Multi-card for Cuda?

Hey guys, has anybody here successfully plugged 2 totally unrelated graphics cards into a single system?

I'm working on an assignment that requires Cuda, but my current box has a 6970 in it, and I'd like to keep it that way, but for this assignment I've got a homeless 9800GTX+ lying around that I'd like to just slam in and run some code on.

Outside of Windows, any idea how ubuntu's going to do in this situation?

Thanks for any help!

Radeon cards don't support cuda, only nvidia cards. And no you can't SLI or CF-X two unrelated video cards. Has to be say a 660ti and another 660ti can't got 660ti and a 660.

MrWizard6600 said:

Hey guys, has anybody here successfully plugged 2 totally unrelated graphics cards into a single system?

Click to expand...

Yes. Up until two months ago I had a 7900GS and a HD 6850 in the same system. But I was running Windows 7 though. Not sure how Linux would handle it but I'd imagine it shouldn't be too bad.

Danny Bui said:

Yes. Up until two months ago I had a 7900GS and a HD 6850 in the same system. But I was running Windows 7 though. Not sure how Linux would handle it but I'd imagine it shouldn't be too bad.

Click to expand...

Where you using the 7900GS for Physx? Because other than that you could only use one of the cards.

austinwillis81 said:

Where you using the 7900GS for Physx? Because other than that you could only use one of the cards.

Click to expand...

No I was not. I was using the 7900GS to power my other two monitors. So I disagree with that bolded part: I was using the 7900GS just fine alongside my HD 6850 to power two additional monitors. No I was not doing SLI or Crossfire. But that wasn't what the OP was asking about exactly.

Danny Bui said:

No I was not. I was using the 7900GS to power my other two monitors. So I disagree with that bolded part: I was using the 7900GS just fine alongside my HD 6850 to power two additional monitors. No I was not doing SLI or Crossfire. But that wasn't what the OP was asking about exactly.

Click to expand...

Huh, its nice to hear these things play nicely together, nice enough even to have both driver suites installed and running side-by-side.

I just finished plugging in my 9800GTX+. On boot my Displayport monitor refused to come up, but after unplugging it everything seems fine.

I'm a little worried about power, if I do my assignment correctly I'll be saturating that GPU thus causing it to hit its TDP, but so far so good.

I'm gonna bump this for the sake of completeness:

I removed the 9800GTX+ a few days ago and left my driver situation relatively as-is (uninstalled CUDA compiler, uninstalled VS 2010, left display drivers remained in-place).

A few days ago I took out my 9800GTX+ without issue, again, leaving the drivers untouched. After doing this I was able to play a couple games (at least Guild Wars 2) in Eyefinity.

When attempting to play Assassins Creed 3 for the first time the engine wouldn't treat the left and right monitors properly, they were simply black. By switching to a resolution that didn't have bezel compensation, and forcing it full-screen the engine did render about a 50px wide bar on either side monitor. At any resolution, both the steam and ubisoft overlays would draw to the two side screens properly. In hindsight this is obviously an Ubisoft engine issue.

I returned to desktop, having noticed that the wide-screen gaming forum has once again gone down, and switched back into my desktop profile (which tells windows that it has 3 monitors installed, rather than this driver trickery which tells windows it has a single really wide monitor plugged in). My desktop now refuses to enable Aero.

I uninstalled the Nvidia graphics drivers via the uninstall provided from add/remove programs and rebooted.

Windows still refuses to enable Aero.

Looks like my software is pretty thoroughly FUBAR'd. Luckey for me software is soft. I'll start nuking drivers now, I suspect I can recover from this without something as drastic as a reformat, but I've been meaning to do one of those for a little while now too, so that's no biggie.