Originally Posted by chewdude
I was running well at 900 OC on the 580 and we tried to get aliitle more like i used to so i upped the clocks to 910 and it started downclocking again after it finished a wu.
so Me being busy as i am i asked are fearless leader to see if he could check it out for me and do what he wanted.
heat was never an issue as I have a a 360 rad for it and the cpu and the cpu is not overclocked at all nor is it folding with the gpu so mu temps were in the low 50's folding at 900 now at 935 its around 80 and making my room really hot thanks chief. Looks as if i will be running the ac in my room all winter lol.
What drivers are you using?
If they are later than the 285.62 drivers, you may want to consider rolling back to them.
Also, if you can get enough cooling to keep the GPU below around 50ºC, it will be much more stable at the higher clock speeds.
With your CPU and GPU combo, you should consider at least doubling your radiator area, if not even more.
More cooling will help the stability of both.
Higher speed fans may help a lot too, depending on what fans you are currently using.
I've got a 240 and a 360 radiator for my 580, and a stock clocked Phenom 9650, and just barely am able to keep the GPU below 45ºC with the 1.175v it takes to run my 580 at 975Mhz using a GPU only water block. It starts failing WU's at about 50ºC.
All 3 of the Fermi cards I've had seemed to like being below that 50ºC mark at max OC.
The next step for my 580 will be removing the heat spreader on the GPU and mounting the water block directly against the GPU die.
I'm shooting for 1000Mhz, without having to break out the expensive to operate chiller.
I disassembled my fried 560 Ti, and noticed that there is a gap between the GPU die and the heat spreader, so all of the heat transfer was through the TIM the factory applied between them. I suspect that is the case with most, or all, Fermi GPU's.
I'm thinking that direct die cooling will give another 5ºC, or more, of headroom.