295 problem

[byron_hinson]

Got a GTX 295 today (BFG) and when I run any games or 3d mark - they run for about 2 minutes then I get a full lock up of the system. My PSU is an old Dark Power 1000 Watt (Be Quiet) - is it likely to be the PSU? Asking as I did a clean install as well and got the same problem

 

[elpedro]

Check the amps supplied by your PSU's 12v rail and the amps required by the 295. Does indeed sound like a PSU issue.

 

[byron_hinson]

It says 75v in total across the 12v rails. Would it make a difference that the PSU Is nearly 3 years old despite it being a 1000 watt model. If I take out the 295 and put back my 280 it works perfectly! Agggrrr

 

[khemist]

Could be high temps, what are you using to monitor temps?, my temps used to be high in a cramped case (antec p182) when i had a 295 and dropped a whole lot when i got a lian li a77.

 

[byron_hinson]

Temps seem ok - happens even when the case is wide open to air too.

 

[Sasahara]

The PSU should be more than fine, unless it's faulty.
Have you tried a different connection configuration, maybe you are overloading a single power cable.

The card may be faulty or driver issue.

 

[byron_hinson]

Well I've tried the card in single gpu mode and it ran fine. Seem when Multi GPU is enabled that it all goes to pot. The only other thing I can think of is that I have a crossfire board - yet I was told the GTX 295 still works fine in that.

 

[Sasahara]

Having a crossfire board won't affect it.

Looks like you may have a faulty card or a driver problem.
Have you tried a selection of driver builds?

 

[byron_hinson]

Cheers - going to return it

 

[mmj_uk]

It could be power supply, I use an 800W BFG and believe it or not I also have an OCZ 1000W PSU which on paper has more amps on all the lines including the 12V, in practice the OCZ gives cold boot probs when overclocking whereas the BFG doesn't.

My point is there's no magic number with PSU's as they vary so much from model to model, I won't recommend you rush out and buy a new PSU but try to test the card on another system as it may not be faulty.

 

[byron_hinson]

Yeah may try it round my parents tomorrow