8800GT power supply

By mitch04 ยท 45 replies
Nov 1, 2007
  1. Hi im wondering of buying the NVIDA 8800GT I have herd that there better then GTX and GTS. my 8600GT is running ok but I have just bought an 22inch LCD and i want full resolution. i got a 400wat power supply do you recon that will be ok? dont really want to buy a bigger power supply.

  2. Ph30nIX

    Ph30nIX TS Rookie Posts: 243

    It depends on your other components, and the quality of the power supply. Often cheap power supplies with not operate at the wattage specified. If you have expensive gear it is always worthwhile spending a fair amount on the power supply. I think 10% of the total cost was said once before on the forums but I cant quite remember.
  3. kpo6969

    kpo6969 TS Maniac Posts: 710

  4. beef_jerky4104

    beef_jerky4104 Banned Posts: 822

    I would recommend upgrading to a better PSU.
  5. zipperman

    zipperman TS Rookie Posts: 1,179   +7

    Your Motherboard manual will tell you the
    min and max it needs.
    But 400 is a good size for the average user.
    Testing it;s voltage output is important.
    asus has a test,what is your MBD ?
  6. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    This PSU is of excellent quality and offers more than enough power for your card and the rest of your system.
  7. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    is there a program to see how much voltage Im using??
  8. zipperman

    zipperman TS Rookie Posts: 1,179   +7


    You have an asus motherboard.If you have a cd install "Probe"
    or download it at asus.
    You can also get a reading in the bios.
    Heres an interesting link on the subject.

    Heres the Test,

    Edited by Moderator: Removed quote. There`s no need to quote the post directly above your own, unless you`re only replying to a specific section, in which case you would only quote that section. ;)
  9. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    hey my mother board is an ASUS M2N-MX X series. cpu 3800+ dual core athlonx2. the power supply is 400wats Omni.

    it says on the powersupply
    DC |3.3v | +5v | +12v | -5v | -12V | +5VSB |
    Output|--------------------------------------- |
    Max |14a | 25a | 12a | 0.5a| 0.5a | 2.5a |
    400watts |
    thats what it says on the power supply
  10. Juanra

    Juanra TS Rookie Posts: 19

    12a on the 12V rail is very low. Are you sure that's what it says. Because if that's what it says, you might need to upgrade.
  11. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    yeh it is im using geforce 8600Gt now
  12. zipperman

    zipperman TS Rookie Posts: 1,179   +7

  13. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    I think it's 21A, not 12A, since my calculations don't give me that 12A value. 125W max on +5V & +3.3V + 2.5W max on -5V + 6W on -12V + 12.5W on +5VSB = 146W. Subtracted from 400W gives 254W on the +12V rail, which translated to 21.167 ~ 21A. An 8600GT needs at least 18A on the +12V rail so if there wasn't enough power I'm sure it definitely wouldn't run. The 8800GT would need more power and the PSU I recommended before would do well.
  14. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    I would get it but I dont no what to do with the old one sell it on ebay?? I tried probe but everytime I start it up just doesnt respond. i tried that site and put down all what i got and say 330watts it needs with the 8800GT??

    http://www.extreme.outervision.com/index.jsp I did it and it recommends 341watts
  15. zipperman

    zipperman TS Rookie Posts: 1,179   +7


    Did you install the version on your mbd cd ?
    Did you get an error message ? Wrong board maybe ?
    It seems you might have the have the wrong Probe version,thats why haveing a motherboard cd is so important.
    ? Do you have One ? and a manual ?
    Who installed your Motherboard ? Please answer this.
    There might be other utilities to install on it.
    As for PWS you don't skimp on this,your results indicate a 500 watt.
    The old one doesn't have much value,save it for backup.
    So do you know how to connnect a PWS ?
    You need the manual or pay someone who does.
    It's a very important to be done right and not block air flow.

    Attached Files:

  16. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    the cd i got from the mother board just wont work for anything because im running windows vista.
  17. Gavin_Capacitor

    Gavin_Capacitor TS Rookie Posts: 47

    My advice would be to buy a 8800GT (providing your PSU has a 3x2 pin power connector) and try it. It will probably be ok with a 400w PSU (it depends on so many things like other parts installed, age of PSU, brand, the list goes on). Worst case scenario your PSU isn't powerful enough and you have to buy another one, making you wait a few days to use your shiny new 8800GT.
  18. mitch04

    mitch04 TS Enthusiast Topic Starter Posts: 154

    oh k so wont blow up or anything. just wont work cause if worse comes to wores I will just buy better power supply
  19. Didou

    Didou Bowtie extraordinair! Posts: 4,274

    Check the Asus website, there might be a newer version which works with Windows Vista.
  20. aznn3rd

    aznn3rd TS Rookie Posts: 112

    I'm pretty sure it can run. My friend runs his 8800GT on a 380W and it works fine.
  21. Bigfellla

    Bigfellla TS Rookie Posts: 98

    Famous last words. This issue also relates to efficiency. The better quality PSU's will be more efficient and therefore less expensive to run. My opinion is that you need a 550W quality Antec or similar for that card.

    I use a 750W corsair, which is overkill, but i will want to upgrade specs in the future. It has a 60A on 12V rail amazingly.

    380W is asking for trouble and the point is, when it does go, it is likely to take out other components with it.
  22. kpo6969

    kpo6969 TS Maniac Posts: 710

    Antec EA 380w = 27amps
    Fine for a 8800GT

    8800GT on a 250w psu:

    If you know what your doing it can be done.
    I run my system with a 26amp psu.

    For an Antec 27amp psu at a $20 price point I can't really disagree even though I wouldn't do it myself, but it can and has been done. My opinion.
  23. Bigfellla

    Bigfellla TS Rookie Posts: 98


    That doesn't prove anything. Funny how over 80% of the thread you referenced are joking about this because he WILL toast something. Its not magic. You can run a system like that for months, but then BANG. You don't just lose a motherboard, you lose a whole system. Add in the extra cost of running a rubbish overstretched PSU (electricity costs due to low efficiency), and then add in the cost of new CPU, Motherboard and GPU, so you could save a few bucks.

    Your comment should read, "If you don't know what you are doing, you'll believe whatever you want to believe". LOL.

    What you wont believe, or accept, is how many issues, from low FPS, BSOD's etc are caused by a underpowered of failing PSU. Not worth it. Buying a cheap PSU is false economics and not good advice. Just my opinion.

    *edit* show me the 12V rail with a multimeter, during gaming.
  24. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    A 250W PSU is grossly underpowered but then, the whole point was that it can work. It won't always but it can. Most users do not realize that the average system may only draw about 300W at most and even a PC with a high-end dual-core\quad-core CPU and a high-end graphics card like the 8800GTX draws under 400W, which needs only a good quality 400-450W PSU such as an Enermax Liberty or a Corsair 450VX.
    As for buying cheap PSUs, it's okay as long as you don't overload them and if you can't afford a good-quality one. But it's not recommended and I believe that's what we at TechSpot are for. :)
  25. aznn3rd

    aznn3rd TS Rookie Posts: 112

    Are you referring to both urls or just the one about the 250W shuttle? Because the EarthWatts PSU seems to be a very strong PSU. Also, for just $5 more, you can get a 420W EarthWatts at newegg, which seems enough for your current build
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