Originally Posted by Foxrun
So winter is here in new england and I got my room down to bout 47-51F. Got my cards stable in games at 950/1900/2004 with a 1.150 volt. Temps have hit mids 60s and low 70s, how safe am I, or am I playing with fire?
Voltage is fine. Core clock is up there but I've seen it benched and not out of it's league. Memory over clocking is a bit more dangerous and doesn't' yield or equal better FPS but marginally.
My benching over clock was @ 944Mhz with 1.125v. An EVGA GTX 580 on air cooling is doing great @ 950Mhz. Good VRAM there. Especially in SLI mode where one of the cards usually tend to lower the over all OC, due to not being as well as an over clocker as the other card. Think you got lucky on the VRAM lottery.
I personally won't go over a 15% OC on the Core clock and %5 on the memory over vanilla reference clocks. I've got mine set @890 Core 1780Mhz Shader and 2075Mhz Memory and I keep my voltage at stock 1.0880v for the 24/7 over clock. That's my safe zone without me worrying and it's been this way for three weeks.
Prior to this I had a 13% over clock @ 875Mhz Core 2075Mhz Memory since February 2011 running 24/7. No problems at all.
I'm happy with it as I don't really need it gaming but it's fun anyway squeezing the juice a bit higher, like my CPU. The GTX 580 runs great at reference clocks technically.
Are you a 24/7 over clock @ 950Mhz? and what kind of percent over clock on your memory?
I'd be more concerned over clocking memory. As for a 24/7 voltage bump on stock air cooling, don't bump any higher than you've got it. It's ok for the occasional benchmark up to 1.1250v but nothing more than 1.150v 24/7 IMO.
Keep in mind as with any OC it does wear out the GPU some, when pushed further than intended specs. So degradation does take it's toll and can shorten the lifespan on your cards. Comes with the territory.
With your SLI set up I don't see why'd you'd need to anyway. Very powerful combo. Come over to the [Official] GTX 580 Overclocking Club thread in my sig link. You can get some great ideas about your card there with other owners and their experiences.