Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My specs:
Windows 7 64bit Ultimate RC
Intel C2D E8500
4gb RAM
Asus Striker II
2x Nvidia GeFoce 260 GTX
OCZ GameXStream 700W 'Dual GPU Ready' PSU

I have Windows 7 RTM but I haven't gotten around to reinstalling it yet.

My issue is, whenever I turn on SLI mode, games will lock up after a few minutes of playing. Temps are fine, nothing is over-clocked and I've got water cooling going to the CPU and GPUs. I've been trying unsuccessfully to troubleshoot the issue myself but I have run into a wall and can't figure out what else to do.

share|improve this question
up vote 3 down vote accepted

Traditionally, in my experience, problems like that are always caused by 3 things:

  1. Heat
  2. Power
  3. Drivers

You already said that 1 wasn't a problem. I wouldn't be surprised of NVidia's Win7 drivers weren't 100% just yet (either cause of the drivers or Win 7 itself), but I would also look at your PSU. I don't know the power requirements of a 260GTX but you might want to check to be sure your PSU can support 2 of those cards.

share|improve this answer
I believe my PSU is 650w or 750w. It was branded 'SLI Ready' so I assume that it should be enough power for it, but you know what they say about assuming... My drivers are the latests and I even ran a driver cleaner before updating. I've not read anything about anyone else having these issues with windows7 and sli so I'm pretty sure its not a driver issue. I may just breakdown and load my RTM copy of Windows 7 to see if that helps any. – Justin Drury Sep 22 '09 at 15:43
The nVidia drivers are probably fine. I am running Windows 7 RC x64 with a 295 (SLI on a card), and it works fine with in SLI mode. I would look at RAM and the mobo drivers (what RAM is in the system btw?) – Daniel Huckstep Sep 22 '09 at 15:49
I believe it is G.SKILL. The RAM is brand new and I believe I was having this issue before I replaced the RAM. I had also replaced the MOBO when I replaced the RAM too. I believe I was using an EVGA 750i FTW or something like that. I will try updating the chipset drivers when I get home tonight and see if that fixes anything. – Justin Drury Sep 22 '09 at 16:08
SLI ready doesn't mean much. What are the specs on the PSU? Maybe a link to the manufacturer's page would help. I'd guess there aren't enough amps available under max load if heat and drivers aren't an issue. – MDMarra Sep 22 '09 at 17:54
+1 MarkM. If you cheaped out on the power supply, I'd be pointing my finger directly at it as the cause. Buy a brand name power supply! – EmmEff Sep 22 '09 at 18:27

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.