Sli - Windows 7.. Problems


Long time IT enthusiast,
Long time reader,
First time poster.

Windows 7 Ultimate (build 7000)
Intel Core2 Extreme q6850, currently 3.66GHz
EVGA 790i Ultra SLI, Bios version currently P08 (have used P06, and P07)
EVGA 8800GT (x2)
OCZ DDR3 PC3-16000 6GB

Have tried Nvidia drivers versions: 182.05, 181.22, 181.20, 180.48 am currently using 185.20

When running apps and games with a single card there are no errors. When I enable SLI, performance decreases substantially and every 6 or so seconds all input (mouse, keyboard) will freeze; for instance in Far Cry 2 I'll be moving forward, suddenly controls freeze up but the character in the game keeps running forward, till I regain input. This keeps happening until it freezes for 10 or so seconds, then the computer restarts. Very frustrating

One thing I'm concerned about is that the second 8800GT I have I bought off of Newegg as a reconditioned card. I read good reviews about EVGA reconditioned cards so I thought I'd take the chance.

So Is the problem with Windows 7 and it's lack of proper SLI compatibility? Or is it the reconditioned 8800GT? Or something else entirely?

Would love to resolve this issue. Thanks in advance

20 answers Last reply
More about windows problems
  1. Stress test each card on its own with Furmark for a few hours. If they're both ok, try with no OC on the CPU.
  2. What do you expect with Windows 7 as it's not even released yet. It's in BETA stage.

    Anyway have you tried putting in another machine under Vista or XP, at least then you could determine if the problem is with the card or not. If you don't have another PC you could always get a 40Gb HD for about £25.00 and install XP/Vista on that to try. If it's not the card i'd raise your concerns with Microsoft so it can be ironed out for it's release.
  3. PEBKAC issue.
  4. Quote:
    Your having SLI problems with a beta version of windows........NOOOOOOO!

    How do you know your overclock is stable? Your computer passes 12 hour stress test like prime 95 or othos right?

    If your a long time IT enthusiest, you would know that the first thing you do when your having these issues is see if your having the same problems without overclocking.

    The idea is to encourage posters to ask questions, not discourage them. Mr Aeronautical ;)

    But yes he does have a point, put your computer to default settings and run it again.
  5. L1qu1d said:
    The idea is to encourage posters to ask questions, not discourage them. Mr Aeronautical ;)

    But yes he does have a point, put your computer to default settings and run it again.
    Oh please, an early version of a pre-released test OS not working smoothly?, who would have thunk it. :pfff:
  6. that isn't the point though, we're not here to discuss that, I mean its just a build off Vista, how many problems can it have other than the ones that came with Vista?

    Honestly my windows 7 beta, is more stable than my Vista lol, and Faster booting...alot faster.

    This isn't a ground up build like Vista was, (from what I understood about vista) So the bugs we saw in Vista Beta won't be the same as this one. I mean if I didn't know it was beta, I wouldn't have noticed the difference. :)
  7. Is it not running DX 11 then?
  8. yes it is, but its backwards compatible:) I mean if no game uses x11, it will just use the already complete dx 10.1 technology.

    Frankly I have absolutely no problems, no freezing, nothing, and I'm running it on a laptop, which has a much higher error percentage, because its a pre configured system, that require custom drivers in most cases. I just installed the windows Vista drivers for my video like a charm.
  9. Cool. :) I might get round to trying the beta myself, although with my kinda luck it will be just as the self destruct timer kicks in.
  10. haha let us know;)
  11. Tri boot now
    vista ultimate 32bit, vista ultimate 64bit, windows 7 build 7000 64bit

    Tried the 3 latest drivers in each except w7 where I tried the 5, Same problem in each.

    As for my cpu overclock, I should have clerified. When I installed windows 7 I set bios to defaults to eliminate problems, also when I initially could not get sli working. Since then I've been working my way up to a stable 3.66GHz. Moot anyways.

    As for individual card stability, I ran furmark for 1h30min on each which came up clean. Furmark is also quite difficult to watch for extended periods of time.

    I'm thinking now that the two cards I have just aren't very friendly together?
  12. Traduction:

    Windows 7 does not like The Hybrid SLI/CrossFire

    Microsoft published a document discouraging the manufacturers of machines to deliver a system hybrid CrossFire or SLI.

    Microsoft does not like Hybrid

    For reminder, Hybrid SLI or CrossFire combines two graphic chips (an IGP and a dedicated graphics board) and use only the IGP 2D and the IGP and the graphics board 3D or when the system at need of more graphic performances.
    The position of Microsoft is rather surprising in front of the craze than the users have for this kind of solution.

    The document of Microsoft explains that Windows 7 will not manage nativement this kind of configuration which he considers "unstable" judging that it offers only a " inferior experiment".
    It will thus fall to the manufacturers of graphics boards to write stable and successful pilots managing this feature.
  13. I no longer have 8800GT's in SLI, but try either one, especially stress test the CPU first, straight lock-ups sounds like CPU, but I don't lean with coincidence that it's only why SLI is enabled. But from my point of view....Ebay both the 8800GT's, you'll get 70-100+ for them, and go buy a GTX260 216, it's better and it's a single card and more overclockable for the heat, just my 2 cents from my experience.

    Windows 7 will be better, but the drivers aren't official and SLI does not have a good history of instantly working, or giving the best results period.
  14. Greetings

    Same problem here!, windows vista worked fine with my 6600 GT in SLI, then I installed 7, in SLI mode machine crashes in the windows experience index test.

    It seems that vista isn't so bad after-all :D
  15. Bgsjust,

    Microsoft does have an official Windows 7 Support Forum located here . It is supported by product specialists as well as engineers and support teams. You may want to check the threads available there for additional assitance and support.

    Microsoft Windows Client Team
  16. it's windows 7 i have tried 3 different sets of cards and the second i turn on sli there are all sorts of problems, any time i go to run a game, BOOM blue screen of death.
  17. I used to have similar problems with my Windows 7 64bit pro SLI issues too.
    RESOLVED by updating firmware bios for the video cards. I went to and got the firmware specifically made for my cards, I then applied the exe file with only one card installed at a time. This allowed me to run SLI without getting the nvidia drivers corrupted.
    Try it. Note: the firmware is a tiny file which can be found on your card manufacturer website (not nvidia).
    I have no issues since doiing that. I also run my SLI 8800gt setup to my 1080p plasma tv using DVI -> HDMI cable.
    Good luck and hope youhave same success as me.

    I used nvidia driver version 195.62 beta.

    Similar SLI Win7 issue is described in detail here:
  18. (((((((((( FIX ))))))))))

    MY fix is to not youse (SLI or Crossfire)
    thay are to unstable. i have had way to much trouble with SLI
    Never again.

    All my games are now flying in windows 7
    yousing (One ATI 5870 video card)

    :pt1cable: :pt1cable: :pt1cable: :pt1cable:
  19. Daykes said:
    (((((((((( FIX ))))))))))

    MY fix is to not youse (SLI or Crossfire)
    thay are to unstable. i have had way to much trouble with SLI
    Never again.

    All my games are now flying in windows 7
    yousing (One ATI 5870 video card)

    :pt1cable: :pt1cable: :pt1cable: :pt1cable:

    That was your problem, you need two cards to do Crossfire and ATi cards can't do SLi.
  20. It would appear SLI does not work well with Windows 7. I have two GTX 280 video cards in SLI. My computer crashed to desktop with most of my games--usually on launch or not long afterwards. I took out one of the two cards and everything now works fine.
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