I just purchased a Dell Precision T3400 Desktop PC to run a multi-display flight simulation for an exhibit. I would have perferred a Dell XPS 630 but that wasn't an option because my custom software application required Windows XP and I was also a government purchaser. In true Dell style, I needed to purchase their (Dell's) configurations or I had to shop elsewhere. I was instructed by the application developer that the simulation would work the best on a pair of GTX 280s (Driving three monitors) running in NON-SLI mode. So I had Dell include two GTX 280 GPUs which Dell said would work with the current power supply delivered with the system (525 Watts).
I had a bit of a struggle getting the various power supply adapters but I got everything connected but didn't power up yet until I see your response.
Can any of you see a problem running two GTX 280 GPUs (Non-SLI) in a T3400 in terms of Power Supply capability and heat dissipation among perhaps other things ? While I can't say for sure, it looks like the system has good cooling with a huge heat sink on the fan blowing air right across the CPU Chip and alongside the back of one of the GTX 280s though I'd like to get your thoughts as well.
While the Dell salesman said it would work, I think the rating of the power supply is low at 525 Watts. If so, would you recommend upgrading to a larger Power Supply ? If so, which should be the basic specs I should look for to assure it would power the GTX 280s ?
If Heat dissipation will be a problem even with a larger power supply, can you recommend a pair of Nvidia GFX cards similar to a GTX280 that will work ?
Two GTX 280's on a 525 watt 41 amp power supply, and a Dell salesman said it would work ? It might , but you'd be pushing it hard.
You'd better get a new psu, something like a Corsair 750, it will help with heat dissipation by giving you some overhead and not running as hot to begin with.
Also, add a fan to the rear grill to act as an exhaust.
Something else you may want to think about, is that the card in the secondary slot will only be running at 8x, may hurt it's performance.