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RAM problems - bad stick?

By tchiseen
Aug 7, 2005
  1. I've got 2 sticks of pc3200 ram on my mobo (for specs check my computer options) but its not running at 400 mhz!! its running at 320 mhz (effective, 160 real clock) needless to say, im po'd.
    is there anything i can do with the timings to make the sticks run at the full 200? they're both supposed to! i can get 400mhz with just the kingmax, but having only 512 proves a BIG drop in performance.

    Detailed Info from Everest: (i've taken out empty feilds) note the timings are basically the only things i see different. HELP! i've also added mobo info too.


    * DIMM 1:

    Memory Module Properties
    Module Name Kingmax MPXC22D-38KT3R-FHA
    Module Size 512 MB (2 rows, 4 banks)
    Module Type Unbuffered
    Memory Type DDR SDRAM
    Memory Speed PC3200 (200 MHz)
    Module Width 64 bit
    Module Voltage SSTL 2.5
    Error Detection Method None
    Refresh Rate Reduced (7.8 us), Self-Refresh
    Memory Timings
    @ 200 MHz 2.5-4-4-8 (CL-RCD-RP-RAS)
    @ 133 MHz 2.0-3-3-6 (CL-RCD-RP-RAS)
    Memory Module Features
    Early RAS# Precharge Not Supported
    Auto-Precharge Not Supported
    Precharge All Not Supported
    Write1/Read Burst Not Supported
    Buffered Address/Control Inputs Not Supported
    Registered Address/Control Inputs Not Supported
    On-Card PLL (Clock) Not Supported
    Buffered DQMB Inputs Not Supported
    Registered DQMB Inputs Not Supported
    Differential Clock Input Supported
    Redundant Row Address Not Supported

    * DIMM 2

    Memory Module Properties
    Module Name Mosel
    Module Size 512 MB (2 rows, 4 banks)
    Module Type Unbuffered
    Memory Type DDR SDRAM
    Memory Speed PC3200 (200 MHz)
    Module Width 64 bit
    Module Voltage SSTL 2.5
    Error Detection Method None
    Refresh Rate Reduced (7.8 us), Self-Refresh

    Memory Timings
    @ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
    @ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)
    @ 133 MHz 2.0-2-2-6 (CL-RCD-RP-RAS)

    Memory Module Features
    Early RAS# Precharge Not Supported
    Auto-Precharge Not Supported
    Precharge All Not Supported
    Write1/Read Burst Not Supported
    Buffered Address/Control Inputs Not Supported
    Registered Address/Control Inputs Not Supported
    On-Card PLL (Clock) Not Supported
    Buffered DQMB Inputs Not Supported
    Registered DQMB Inputs Not Supported
    Differential Clock Input Supported
    Redundant Row Address Not Supported

    * MOBO:
    Motherboard Properties
    Motherboard ID 65-0702-000000-00101111-110404-I848P$AH002001_BIOS Date: 11/04/04 20:48:18 Ver: 08.
    Motherboard Name Asus P4P800S-X

    Front Side Bus Properties
    Bus Type Intel NetBurst
    Bus Width 64-bit
    Real Clock 200 MHz (QDR)
    Effective Clock 800 MHz
    Bandwidth 6400 MB/s

    Memory Bus Properties
    Bus Type DDR SDRAM
    Bus Width 64-bit
    Real Clock 160 MHz (DDR)
    Effective Clock 320 MHz
    Bandwidth 2560 MB/s

    Chipset Bus Properties
    Bus Type Intel Hub Interface
    Bus Width 8-bit
    Real Clock 67 MHz (QDR)
    Effective Clock 267 MHz
    Bandwidth 267 MB/s

    Motherboard Physical Info
    CPU Sockets/Slots 1 Socket 478
    Expansion Slots 4 PCI, 1 AGP
    RAM Slots 2 DDR DIMM
    Integrated Devices Audio, LAN
    Form Factor ATX
    Motherboard Size 170 mm x 300 mm
    Motherboard Chipset i848P
    Extra Features JumperFree, Stepless Freq Selection
     
  2. zephead

    zephead TechSpot Paladin Posts: 1,569

    your chipset does not support ddr400, so the ddr400 modules will run at the chipset's limit of ddr333. also with your chipset, DDR333 modules are underclocked to DDR320 specs, when a 800mhz cpu fsb is active. this is to minimize latencies.
     
  3. tchiseen

    tchiseen TS Rookie Topic Starter Posts: 45

    uh, im sorry to disagree with you, but not only does it say riight on the box that it supports ddr400, but i can get a single stick to run at ddr400.

    baring this, is there anything i can do (lower fsb) to get more performance?
     
  4. zephead

    zephead TechSpot Paladin Posts: 1,569

    according to the intel website, the i845 series of chipsets do not natively support ddr400. in your case, perhaps the board ran a single stick at ddr400, but when another non-identical stick was added it dropped down to ddr333. in the end, because of the 800mhz fsb, it dropped again to ddr320.
     
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