Overclocking athlon 64 X2 4200

By sabenfox · 16 replies
Dec 19, 2005
  1. Hey all, i'm trying to overclock my athlon 64 X2 4200, my system specs are below

    GIGABYTE GA-K8N Pro-SLI Socket 939 NVIDIA nForce4 SLI ATX AMD Motherboard

    MSI NX7800GTX-VT2D256E (Lite) Geforce 7800GTX 256MB GDDR3 PCI Express x16 Video Card White Box - OEM

    AMD Athlon 64 X2 4200+ Manchester 1GHz FSB Socket 939 Dual Core Processor Model ADA4200BVBOX - Retail

    CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered Dual Channel Kit System Memory Model Twinx2048-3200c2

    Creative Sound Blaster Audigy2 ZS SB0350 8 (7.1) Channels PCI Interface Sound Card

    also a generic hard drive

    I went into the bios and changed the front side bus from 200 to 210, rebooted, and now i'm running at 2.3 instead of 2.2. Then i went from 210 to 215 and the system hangs. Do i need to add voltage to the ram to try and get it to boot, do i need to add voltage to the cpu, i'm not sure what i need to do. All i have ever used to overclock is the FSB as i've heard it's the safest.
    Thanks !
  2. howard_hopkinso

    howard_hopkinso TS Rookie Posts: 24,177   +19

  3. brandl

    brandl TS Rookie Posts: 20


    to overclock this processor, is not like the old ones (athlon xp) that you just incrase the fsb and it was done.
    now, you need to watch the:

    htt/memory relation

    htt voltage

    so, you should read a complete guide to overclock your computer to do it in a "safe" way and get a good result. other thing is that no system is equal, so you need to try a lot of configurations till find one fine to you.
    keep looking for guys that have the same specifications parts (mobo, cpu) and watch what they are done in their systems.

    good luck!
  4. Coyote

    Coyote TS Rookie

    Sabenfox, I'm working on the same thing:

    AMD Athlon 64 X2 4200+ Rev E6, 85w
    Gigabyte GA-K8N Pro SLI
    Kingston KHX4000 DDR500 RAM

    I can get to 210 MHz (x11, 2.3 GHz, DDR420) easy, at default vCore (1.10 - 1.34 vcore with Cool & Quiet) and I'm running stable on it now.

    That board always powers up at stock, then OCs and does a quick stress test during the POST. If your OC isn't stable, it will watchdog and reboot. This is a good thing, because you can then press DEL before it OC's it again. You don't have to clear CMOS.

    HT Multiplier: Anything much over 210 FSB is going to require you to drop the HT Multiplier to 4x: The HT bus will NOT do much over 2000 MHz. 200x4 is 1600, and any overclock will raise that. As long as your HT is running between 1600 and 2000, you won't suffer.

    RAM clock and timings: FSB is not RAM SPEED! The FSB is multiplied to the full CPU speed, divided down to the RAM clock, and then x2 for DDR. If your RAM is limited to DDR400, and you raise the FSB to raise the CPU clock, lower the CPU/DDR ratio to keep DDR400. If you also need to drop the CPU multiplier, you might need to raise the CPU/DDR ratio to keep your RAM at DDR400.

    If your RAM can OC, set it to Manual 2/2 and the BIOS will calculate proper timings for speeds over DDR400. To get this to work you MUST set DDR ratio to Manual. IF you leave DDR ratio at AUTO, the BIOS will not adjust the timings for a higher FSB. (Also, ratios above 2/2 should be able to give DDR500 at 200 FSB, but don't work right)

    vCore: Start with 1.45 if you are going over 210. WATCH YOUR TEMPS if you raise vCore. When you change vCore, The BIOS will lock the vCore from being changed by CnQ, so your chip will not cool off as much when idle anymore.

    Multiplier: You can lower it but not raise it. Don't bother unless you Also, if you drop your multiplier to get a higher FSB, cnq can't lower it.

    I found I needed 1.45v to get it to POST over 210. I could POST at 250x11 (2.73, DDR500): Memtest86 ran non-stop at 250x11, and my memory is solid at DDR500, but Windows would not boot.

    By raising my vCore to 1.5 and using 240x11 I could boot and run Prime95. As soon as my temps hit 60C, I started getting random errors.
  5. YellowC4S

    YellowC4S TS Rookie Posts: 107

    How I overclock...The Somewhat Complete Guide to A64 Overclocking Part I

    I'm not familiar with what is controllable on your particular board so I'm going to give it to you generic. You can find a lot more information on this at;

    Critical Overclocking Programs you’ll need:

    CPU-Z: General System Monitor and report.
    Memtest86: You'll need to run this from a Floppy or Bootable CD. This basic program is still considered the best for testing your RAM
    SuperPi: Intensive mathematical program that stresses CPU/Memory pretty extensively. I like this program because it gives you a good indication of your overclock in under a minute’s time.

    Critical Components for a Quality Overclock

    Power Supplies are missed so often when it comes to figure out why your system isnt overclockig the way it should. DONT SKIMP HERE! Get yourself a quality Power Supply and you'll never regret it. The Power Supply that comes with most cases is garbage. If budget is tight, Go with an ANTEC or ENERMAX case. These usually come with a pretty decent supply.

    There are several more factors that go into a quality and Stable A64 Overclock, a few of the factors we need to take into Consideration are

    CPU Multiplier
    CPU Voltage
    HTT Frequency
    HTT Multiplier
    Memory Divider (There is ALWAYS a memory Divider with a A64 system)
    Memory Voltage
    Ram Timings
    Chipset Voltage
    AGP/PCI Lock

    Finding the right combination of these settings is the only way to get the most out of your A64

    CPU Multiplier
    All A64s are at least Half Locked. This means that you can set the CPU Multiplier Lower than stock, but not Higher. This is a Good thing. Very rarely with A64's would you ever need to raise the CPU Multiplier over the Factory setting. The exception to this are the FX chips, they are fully unlocked.

    CPU Voltage
    Most A64s have a default voltage of 1.4v to 1.6V. A64s are extremely efficient and usually can only take about 1.7v before they just start producing excess heat. I've run my Mobile up to 1.9v but found it did NOT help my overclocks and simply caused the CPU to produce enormous amounts of heat. These are NOT XP-M chips! While I doubt that running voltages between 1.75 and 1.9 will cause any permanent damage, it certainly has not shown to be beneficial in any tests I’ve seen so far.

    HTT Frequency
    A64s don’t use a traditional Front system Bus. Instead they use a HyperTransport. I can only assume its abbreviated "HTT" to differentiate between Intel’s "HT" and Hyper-Threading Technology. They are VERY different.

    The HyperTransport is what controls the base frequency for communications and CPU speed in our A64 System. The CPU Speed is controlled by the HTT Multiplied by the CPU Multiplier, The HyperTransport or Memory controller is controlled by the HTT Multiplied by the HTT Multiplier, and Memory speed is controlled by the HTT Frequency, Multiplied by the CPU Multiplier and then DIVIDED by the Memory Divider. That’s a bit confusing for most folks. And it took me a while to grasp the concept as well.

    HTT Multiplier
    Most AMD Motherboards are designed to handle an 800-1000 MHz Hyper Transport bus. Factory Default on 754 CPUs is 800 MHz (A 4X Multiplier) and 1Ghz (5x) on 939 CPU's this is a Critical part of Overclocking an A64 to the Max. Pushing the HyperTransport past 1Ghz can cause all kinds of system instability that is commonly misconceived as "I maxed out my CPU" or "My Ram is holding me back"

    Memory Divider
    This is one of the most Confusing aspects of A64 Overclocking. There is ALWAYS a memory divider. Setting the Memory to 1:1 means that the HTT bus is multiplied by the CPU Multiplier and then Divided by the CPU Multiplier to set the Memory speed. This means that it is OK to run your Memory at its peak efficiency and still go higher with your HTT bus if your CPU can take it. Take note that I said its "OK" not advisable. There are still sufficient tests out there showing that running a 1:1 ratio will garner you the best overall performance. I plan on adding a few test results in the next week or so showing the difference in performance using a higher memory divider than CPU Multiplier.

    Since A64's use an On chip memory controller, the Ratio must be calculated a bit differently than old. 5:6 is NOT always 5:6.

    Memory Voltage
    Most motherboards offer a degree of memory voltage options. The memory of choice lately has been Samsung TCCD Based modules with Brainpower PCB's. These Modules run at 2.6v stock voltage, and can usually do no better with voltage up to about 2.8-2.9 volts. There have been a few reports of better settings with voltages over 3v, but these seem to be pretty rare

    Most other memory can benefit from having additional voltage run through it. The king of this is the elusive Winbond BH-5 based memory modules. If you’re lucky enough to have some of these, you may want to invest in an OCZ Memory Voltage Booster if your motherboard is compatible as these can run some very impressive timings with a lot of voltage....
    Speaking of Timings...

    Memory Timings
    There are 5 Numbers in our Timings that we need to worry about a lot. Personally, I would like to learn more about the other numbers, but as of this writing, I'm pretty much in the dark there.

    What we do need to worry about are CAS Latency, RAS to CAS Delay, RAS Precharge, and Cycle Time(Tras), and CPC (command Per Clock)
    Ideally, we want these timings to be 2-2-2-5 1T. Most TCCD based module does this at 200 MHz (DDR400) and can usually go up to 215-220 with a Bump in Voltage to 2.7, and then we need to loosen them to go higher. 2.5-3-3-7 is still considered reasonable memory timings for an A64 system, and some people even go out to 3-4-4-8, but I would personally advise against using timings that high with an A64 System. We ALWAYS want to use CPC (1T) this means the Command per Clock interface is enabled. 2T performs extremely poorly on A64 systems. But since our memory controller is on the CPU, the Double Sided memory problem that plagues XP Motherboards is not evident. Give AMD a WOOT for that one.....

    Chipset Voltage
    Usually just a small bump in Chipset Voltage will stabilize a flakey HTT bus. 1.6 is Stock on most motherboards, but 1.7 to 1.8 is acceptable as long as you have decent cooling on your Northbridge chip. Many A64 Motherboards use Passive heatsinks on these chips so before you install your dandy new A64 system, take off your NB Cooler and replace the Factory thermal past with some AS-5. This is usually enough to keep the MB Cool enough to run the extra voltage. Placing Ram Sinks on your Southbridge and any other heat producing chip is never a bad idea either.

    AGP/PCI Lock

    The AGP and PCI Bus' are tied together on all motherboards that I know of. They are also derived from the FSB (Or HTT in the case of AMD) frequency by a divider. NVidia NForce chipsets have whats called a PCI/AGP Lock. This keeps your PCI and AGP Bus at a constant speed no matter what your HTT bus is. This is CRITICAL. If y our PCI bus is too fast, you WILL corrupt hard drive data. If your AGP Bus is too fast, you WILL have Video problems. Via Chipsts have been known to have Faulty PCI locks. This appears to be corrected in the KT800 Pro Chipset, but KT800 and below SHOW a PCI Lock in most bios's but it doesnt do much... This is a Primary reason why overclockers stay away from these boards.

    On your Nforce or Via KT800Pro board you want this setting at 33Mhz if its listed as a PCI lock, or 66-67Mhz if its listed as a AGP Lock. Pushing this offers absolutely no benefit as the bandwidth provided by these frequencies is more than todays Hard Drives or AGP Video cards can use.

    Disable this. This is a feature that will automatically UNDERCLOCK your system if it feels it doesnt need to run so fast.... WHo are "They" to tell us how fast out CPU should run?

    Now.... What do we do with all this Information??? Start Overclocking of course.....

    First Thing First... Let’s see how fast our Processor can go.

    Set your Memory Divider at its lowest setting. (Usually 100 or 133) This will give us a LOT of headroom to push out CPU.

    Next, Drop your HTT Multiplier to 3x and your CPU Multiplier 1 Notch (If you have a 2 GHz CPU, drop your Multiplier down to 9x)

    With these settings most AMD systems will boot and run at a 230HTT so go there first. Once you get into Windows, Run a 1Million run of SuperPi, and then a Prim95 Max heat test for about 10 Minutes. If it passes both of those, its time to go further.
    Go 5 MHz at a Time and Repeat. During this we'll want to raise the VCore of our Processor to maintain stability. Once SuperPi and/or Prime95 fail, raise your VCore .05 Volts and Try again. SEE CPU Voltages Ademdum at the end of this guide for processor specific Voltage recomendations.
    This is a Slow Time Consuming process, so have a few Mountain Dews and some chocolate bars handy.

    Once your push your HTT bus back over 800 MHz (267HTT Bus) raise your Chipset Voltage up to 1.7

    with any luck, you'll hit 260-280HTT Depending on your CPU.

    Write this info down and then we move on to testing out Memory.
    As stated above, A64s are VERY efficient, there have been reports of outrageous overclocks using the stock AMD Heatsink. But I would still recommend a high quality Swiftech or Thermalright Unit. (Dee DavidHammocks HSF Guide for specifics)

    Anyway, Standard Desktop chips should be kept under 55c in ALL cases. It should NOT be hard to keep then under 45-48c with good quality cooling. Running higher than that is a good indication that you have misapplied your HSF and/or AS-5 Remount.
    Mobile chips are rated a bit higher, but there is still no reason to ever see temps higher than 55c. The lack of an IHS provides better contact with the Heatsink and it’s very possible to keep temps at 45 and lower with quality cooling. Even with high overclocks.
  6. YellowC4S

    YellowC4S TS Rookie Posts: 107

    Part II

    Torture your Memory Next
    Memory is usually the Culprit in holding back overclocks. Finding out the capabilities of what our memory can do is critical.

    Drop your HTT bus back down to 200, and reset your Memory Divider to 1:1 (Usually "AUTO") Leave your CPU Multiplier at 9x (For a 10 Stock Multi) and let start out at 215 at Stock Timings, Bump VDimm up to 2.7v(Or +.1Volt)

    The 2 tests you want to do here are SuperPi 1 Million and Memtest86 You'll need a Floppy disc or Bootable CD to run Memtest86 (Or if you have a DFI UT, there is a Modded BIOS available with Memtest built in)

    Run 5 Passes of Memtest86, then boot into Windows and Run SuperPi. You won’t be fast, but SuperPi 1Million runs a LOT of numbers through your Memory. If all goes well, go up 5 MHz at a time until one starts to error.
    That’s where we need to start loosening the timings.
    Go up .5 on Cast Latency, 1 on RAS to CAS Delay, 1 on RAS Precharge, and 2 on Cycle Time (Tras) and Repeat these tests. Depending on your memory,
    you may want to loosen them more, but I would suggest keeping them under 3-4-4-11 if at all possible. If you’re using Memory Other than TCCD based, don’t be afraid to bump your Memory voltage more. Most modules will take 2.9-3.0 Volts just fine and BH-5 has been known to go as high as 3.3 to 3.5v!

    Once you've found your Memory’s max speed, this is where we need to do some math. Most likely there’s a sizeable gap between what your CPU can do and what your Memory can do. That’s OK.... That’s why we went down a Notch or 2 on our CPU Multiplier testing.

    Lets say your CPU went to 260 Stable with a 1x drop in your Multi, Not bad.... a 340Mhz O/C on a stock 2Ghz chip... but your memory only went to 230 before you had to go to slow in your Timings. That’s OK.... Drop the HTT down to 230 and bring your Multiplier back to stock speed (10 xs in our example) you should have a Rock Solid 300Mhz overclock on your hands.

    If the Gap between your Memory and CPU is so high, you can’t get to your Max CPU Speed with your Stock Multiplier, we may need to run a higher Divider on our Memory.
    If we're talking 30+ MHz base difference.... You should probably drop your Memory Divider down to 166 and use your Max CPU Speed we figured out. Less than 30 MHz and you'll probably get better performance running 1:1 at your Memory speed. I say this because we'll be losing memory speed at our best settings at that point. Only use a Higher Divider IF your CPU speed will bring your Memory speed to within 2-5 MHz of your MAX Memory Speed. 240HTT X10 = 2400Mhz, Divided By 11 (166) brings out Memory down to 218Mhz If out MAX speed as 236, we're Giving away Memory bandwidth for no reason. However, if your Max CPU bus is 260, then we get this 260x10 = 2600 /11 = 236.
    See how that works? Now out Memory is maxed AND out CPU is maxed....

    Hope this helps.
  7. sino1969

    sino1969 TS Rookie

    any help ? overclocking an athlon x2 4200+

    Hey all, i'm trying to overclock my athlon 64 X2 4200, my system specs are below


    2 X GoldenMars Desktop 1GB DDR2 PC6400 800MHZ DIMM


    2 X 1 GB GOLDMARS DDR2 PC 6400 800


    I went into the bios and used the overclocking option +10% , rebooted, and now i'm running at 2420 instead of 2200

    i run CPU-Z


    VOLTAGE : 1.360
    CORE SPEED : 2420 MHZ
    MULTIPLIER : X11.0
    HT Link : 1100 MHZ

    Thanks !
  8. jack_spratt

    jack_spratt TS Rookie

    Thank you YellowC4S for such a fantastic comprehensive guide.

    I know this topic is somewhat dead, but I 'll ask here anyway.

    Having used YellowC4S's guide I've managed to overclock my 4200+ on a KN9 ULTRA mobo to 4614ghz which isn't bad. that's with 240 HTT, 1.4V 11x multiplier 400mhz RAM. If I go to 248 HTT then the system becomes v unstable (I've tried using up to 1.5V with this and get the same problem) and I can never get it to POST boot at 250 HTT (though haven't tried many high voltages with this).

    I wondered if anyone had any tips on how to go higher than this, and also I wanted to ask if it is really necessary to slow down my RAM from 800 to 400 (the slowest my mobo will let it go) in order to O/C. I mean, seems a bit of a sacrifice, although a few hundred more mhz on the CPU is presumably much more valuable than the lost mhz on the RAM...?

  9. deeps1987

    deeps1987 TS Rookie Posts: 109

    I have a

    ASUS A8N-SLi Socket 939 NVIDIA nForce4
    AMD Athlon X2 64 4200+ Manchester 1GHz FSB Socket 939 Dual Core
    ATI Radeon Connect 3D X1900 XTX 512MB
    Corsair Twinx1024r-3200c2 Platinum (2X1GB) DDR400 PC3200

    I tried to overclock it last night, and found it to be rock solid at
    240 X 11 @ 1.45V
    this gave me it 2640mhz per core, which is 5280Mhz total, from 4200Mhz
    All this is running on air cooled components, my temps didnt increase that much (before OC it was around 49*C, now its 52*C)

    But as 'brandl' said, things get way more complicating
    My RAM is said to run at 2-3-3-6 @ 2.75V, which it did, prior to overclocking the CPU.
    After i overclocked the CPU, the best i could get from it was 2.5-3-3-6 @2.7V
    Iv never Overclocked before, so i dont know how far i can overvolt my RAM.
    CPU is at 240 FSB/HTT and my RAM is rated at DDR400(200Mhz right?) will this work correctly, or will i have to reduce my FSB/HTT to 216, and overclock my RAM to 433Mhz to bring them inline?
    (433/2=216) My Mobo only lets me select, preset RAM Mhz' (i.e 333,400,433...etc)

    Another thing, according to CPU-Z, my HT Link is 720Mhz......is that good or bad? In the BIOS my HT settings are set to auto, as i dont know how to use theses.

    So basically, id like to know if i overclocked my system to best settings, and if it is possible to lower my RAM timings, aswell as what to do with the HT Link, if anything.

    P.S. i have included CPU-Z Screenshots, if they help

    Attached Files:

    • CPU.JPG
      File size:
      45.3 KB
    • RAM.JPG
      File size:
      32.3 KB
  10. KingCody

    KingCody TS Evangelist Posts: 992   +8

    hi deeps1987,

    1.) Forum etiquette:
    1a.) you should have started a new thread for this, instead of reviving an old thread. (but I'm a nice guy so I'll help you out anyways ;))

    2.) CPU speed:
    2a.) you have an Athlon64-X2 4200+. the "4200" is it's PR rating / model number. it is NOT its actual operating speed. it runs at a default speed of 2600MHz.

    2b.) you have a dual-core processor, but the cores are independent of each other. they cannot work together as a single high speed processor, so you can't add the two speeds together because it doesn't work that way.

    2c.) your default speed was 2600MHz (not 4200MHz) and your overclocked speed is 2640MHz (not 5280MHz). you only overclocked it by 40MHz (not 1080MHz)

    2d.) your default CPU multiplier is 13. with a BUS speed of 240MHz x13 your CPU would have been overclocked to 3120MHz. since you dropped your CPU multi down to 11, you only ended up with a CPU overclock of +40MHz (as opposed to +520MHz if you left the CPU multi at 13)

    3.) RAM Speed:
    3a.) socket-939 uses DDR RAM. DDR stands for double-data-rate. basically it transfers data two times per clock cycle. so the effective transfer speed is twice the actual operating speed. DDR400 has an actual speed of 200MHz and an effective speed of 400MT/s. when calculating overclocking values you need only be concerned with actual operating speeds. effective speeds are seen/referenced more often for simplicity and marketing reasons, but when overclocking pay no attention to effective speeds.

    3b.) your RAM is "said to run" at 2-3-3-6@2.7v at it's default speed of 200MHz (DDR400). it is not guaranteed to run at those tight timings at higher frequencies. you rasied the BUS speed up to 240MHz which also raised the RAM speed up to 240MHz as well, that is why you had to relax the timings to stabilize it.

    3c.) what you refer to as "preset RAM Mhz' (i.e 333,400,433...etc)" in your BIOS settings are not actually preset frequencies, but they are actually frequency ratios/dividers. on an AMD64 system the RAM speed is determined by a divider of the internal CPU speed.

    3cc.) at default speeds your RAM divider will be the same as your CPU multi (both the system BUS and RAM will operate at 200MHz). so when your CPU is running at 2600MHz, if you select DDR400 in your BIOS then the RAM will use a divider of 13 to run at 200MHz. if you select DDR333 then your RAM will use a divider of ~15.5 to run at (or near) 166MHz. if you select DDR266 then your RAM will use a divider of ~19.5 to run at (or near) 133MHz. these divider values will not change, so now that you know them you can use them to calculate your RAM speed when overclocking your CPU.

    3ccc.) let's use your overclock settings as an example. at a CPU speed of 2640MHz with your BIOS RAM setting at DDR400 (divider=13) your RAM will run at ~240MHz. if you select DDR333 (divider=15.5) your RAM will run at ~170MHz. get it?

    4.) HTT Speed
    4a.) your hypertransport (HTT) speed is determined by a multipler of the system BUS speed. all socket-939 CPUs have a HTT speed of 2000MT/s (1000MHz). since the default system BUS is 200MHz, the default HTT Multi is 5 to get 1000MHz.

    4b.) since you left your HTT speed set to "auto" in your BIOS it lowered the HTT multi down to 3 [240x3=720MHz]. there is little/no gain by overclocking the HTT and it often leads to instability if overclocked too high. for this reason you want to keep the HTT speed as close to 1000MHz as possible without going to far over it.

    4bb.) in your case [240x5=1200MHz] is too much and your system would be unstable, but [240x3=720MHz] is lower than it has to be. [240x4=960] is very close to 1000MHz and it doesn't go over so a HTT multi of 4 is the right speed to use in this case.

    5.) voltage
    5a.) raising the voltage to any component does NOT overclock it. raising BUS / multi speeds and reducing dividers / ratios are what overclocks components. as you overclock higher and higher the component may need more juice (voltage) in order to remain stable. remember the component was designed to run at it's default speed and voltage, when you increase that you also shorten it's lifespan. how much it's lifespan is actually shortened is different for each individual component, but it will usually become obsolete before it's "shortened" lifespan is over anyways.

    5b.) raising voltages DOES have risks. no component is equal. every component can handle a different voltage. just because jimmy bob down the street runs his CPU a +2volts 24 hours a day doesn't mean you can. your CPU may burn up just by raising it by +1volt. if you're worried about burning up your CPU/RAM/motherboard then DON'T raise your voltages. you can overclock until the cows come home on the stock voltages without damaging your components, since you're new to overclocking I highly suggest you leave your voltages at their default values until you gain some more overclocking experience.


    EDIT: I think I covered everything, but I'm tired ;). reading all that may be confusing at first, so you may need to read it over a few times but it should eventually become clear. if you have any more questions let me know.

    good luck and happy overclocking :wave:
  11. deeps1987

    deeps1987 TS Rookie Posts: 109

    hey KingCody,
    thanks for the reply, just a few questions/comments

    "2.) CPU speed:
    2a.) you have an Athlon64-X2 4200+. the "4200" is it's PR rating / model number. it is NOT its actual operating speed. it runs at a default speed of 2600MHz."

    according to AMD my processor is rated at 2200Mhz.

    My default speed was 2200Mhz at a Multiplier of 11 (it doesn't go any higher) at 200FSB/HT (11x200=2200)

    I know overvolting doesn't overclock, what i was saying was i had to increase the voltage to run at my desired settings, because my computer wouldn't even start, so therefore i had the choice to loosen my overclock, or increase volts to make it more stable, i did a bit of both, to compromise.

    The RAM divider thing still don't make sense to me.

  12. Cinders

    Cinders TechSpot Chancellor Posts: 872   +12

    When you brought the HTT up from 200 to 240 you not only overclocked your processor but you also overclocked you memory too. Normally your memory runs at 200MHz, DDR400 or PC3200 <----- all the same speed. Now your memory is running at 240MHz, DDR480 or PC3840.

    A divider is a BIOS device that allows you to overclock your processor without overclocking memory. A divider is also a BIOS device that allows you to overclock your memory without overclocking your processor. Normally your processor and memory run on the same base frequency of 200MHz with a divider of 1/1 or 1 so the divider doesn't make a difference to the clock equation. I used to know exactly what the equation was but it's been a while since I've needed to calculate anything and I reduced the the equation down to "overclock the processor and memory at one to one and use whole number processor multipliers"

    Oh, T2 command rate on your memory is very slow. You may want to rethink your overclock with a command rate of T1 because it will significantly increase the amount of work that both your memory and processor do at significantly lower clocks. You can measure any increase in memory and processor work with SANDRA. You'll want to "back off a bit" if you try to make something faster but your scores start to go down because you've reached the limits of your hardware.
  13. deeps1987

    deeps1987 TS Rookie Posts: 109

    Thanks Cinders, i get it now
    so when the divider is set at 400, its stock (200) 1:1
    what if i go to 333 (166) or 433 (216)

    does that mean that, if i overclock my CPU, and i set my RAM at 433 (216) it brings them back inline?

    and thats why when i overclocked my CPU, it automatically turned down the divider, to keep it as close to 1:1 as possible?

    if so, i get it :D

    i know im gonna sound stupid now, but which ones are my T1 and T2 timings? is T1, my 2.5?
    and what should me T2 be at?

  14. Cinders

    Cinders TechSpot Chancellor Posts: 872   +12

    Yes I do believe you have it. I would't place a memory divider and then raise the HTT to counteract it though.

    Yes, your motherboard can and will set a memory divider for you if you raise the HTT without specifying that you want to raise the memory frequency also. Dividers other than 1/1 are usually performance downers, but allow you to compensate for parts that aren't as capable of overclocking as other parts you may have.

    Nine, ten eleven, twelve, thirteen are all good processor multipliers, but nine point five, ten point five, eleven point five, twelve point five usually make your memory performance go down because you've introduced a memory divider with the point five.
  15. Cinders

    Cinders TechSpot Chancellor Posts: 872   +12

    Your command rate is set at 2T and is usually listed seperately from your other memory timings in your BIOS. Look at the picture of your memory timings. Near the bottom of the picture you'll see command rate 2T.

    Go back into your BIOS and set your HTT to 200 and then find and set your command rate to 1T. Don't forget to set your HTT to 200 or your computer probably will not boot. Go through the overclocking process again and find your memory's maximun speed at 1T. It will be less than 240 but you will have a faster computer.

    I think, though I'm not 100% sure, that you need to set your memory divider to manual in the BIOS to make sure your memory runs at 1/1.

    *EDIT* I downloaded your manual and you need to set the memory divider to 200 to make sure the BIOS doesn't throw in a different divider and your command rate is also in the same place but is listed as 1/T/2T memory timing. Set it to 1T. /*EDIT*
  16. deeps1987

    deeps1987 TS Rookie Posts: 109

    thanks for all your help Cinders, really appreciate it
  17. Cinders

    Cinders TechSpot Chancellor Posts: 872   +12

    My Pleasure :)
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