Ive run multiple tests on my card and it is stable at 945mhz and 2100mhz for memory at 1.125 volts. My only worry is that is too many volts for 24/7 usage? I noticed a 25% increase from stock settings in Just Cause 2. So needless to say id like to keep it at this volt and speed but is it safe? The card never gets hotter than 85.
Thats a perfectly safe voltage and its the same voltage that I used when I owned a GTX 580 that I had running at 950core. From what I have been reading your safe as long as you do not exceed 1.5vc but in order to do that you would need to flash the card to an unlocked bios. You have a nice card btw, anything at 900+mhz core turns the GTX 580 into a completely different beast due to how well the fermi architecture scales in performance to the overclock being applied.
no, you may NOT do overclock!! because your gpu gets toooo hot!!! but you need new advanced air cooler or new watercooler. I also don't want do overclock for gtx480.
What kind of stability tests did you run on the card for that overclock? I have three GTX 580s in SLI and the cards do get hot. Running in non-SLI single mode is fine, but running in SLI exposes overclocking instability pretty quickly. All three of my cards run at 800/2200. They will run at 850MHz for the core, but the cards require 1.075V to 1.1V and will get close to mid 90s in temps when folding Project 6811 in Folding @ Home. Try looping Unigine Tropics or Unigine Heaven. I doubt your overclock will hold.
Hi My Card Unstable At 950 1000 1900 with 1.20v ! (99.9% Stable, I Think with 1.21v is 100% stable ) ( Temp : 78 ~ 82 ) How could you stable it with 1.125v !!!! :3eyes: ( My card was stable with 1.10v @ 900 1000 and 920 ~ 925 1000 with 1.125v ! ) I think it is related to GPU Batch right? Voltage Table of my card : 875 1000 1.05v 900 1000 1.10v 920~925 1000 1.12 ~ 1.15v 950 1000 1.21v :infinity:
Just some info: The max voltage on reference GTX580 is 1.15V , so unlocked bios will give you max of 1.21V not 1.5V. Some vendors do have the max voltage on there cards of 1.21V. (ASUS) NVIDIA allows you to go up to 1.15V on reference cards with software , consider that as safe. Unlock your bios and you lose your waranty. More info on BIOS editing FERMI : http://forums.guru3d.com/showthread.php?t=336117
The best benchmark i have found that really stress my SLI gtx 580 is AvP benchmark. is pretty short, only 3 minute long. Running heaven, 3dmark, metro2033, crysis, and all those benchmark for hours and it wouldn't fail only to find out that in the first run of Avp benchmark it would freeze half way.
For reference I'm running my GTX470 at 1.26v and it hasn't died yet. Is watercooled and never goes over 65°c. Any higher voltage doesn't get me anywhere as it seems the power circuitry is limiting somehow. I'd say 1.125 is easily safe for Fermi.
My friend burned out his gtx 570 2 days ago with only 1.1V. Theres even a thread in overclock.net on how many GTX 570 have you burn out and they don't recomend anything above 1.080v because it cannot handle high voltage. so GTX 570 users beware. 580 users are fine since it has 2 xtra vrm capacitor for the voltage.
