Originally Posted by Lukather
I've seen it suggested in here that it's safe to raise the CPU vcore up to 1.6v if the 1090 is in a water cooled rig, however my understanding is that 1.55v is the voltage ceiling beyond which the silicon will in fact begin to breakdown, causing instability over time and eventual chip death. The temperature at which the chip is kept with water or Air cannot change this as it is an engineering principle. (These are not my Words I'm quoting another)
"Voltage = heat. You can remove the heat faster with better cooling, but you are still generating heat in the chip by over-volting it. Also, there is the minor problem with electro-migration, where gate material migrates from the +VDC side of the gate towards the GND side of the gate. This process will eventually kill that gate, and your CPU."
IOSEFINI any comment? you've taken this chip pretty far as a 24/7
High volts and temps will kill your CPU faster, I agree, but that CPU will last long enough and will be replaced anyway, because it becomes old(outdated).
If you have a better cooling system (CPU runs cooler), you are able to extend that CPU life a little bit longer.
Since I bought my 1090(april or may , last year), I run it(prime95), most of the time, above that 1.55V limit, so if it last like 2 years(will last more than 2) instead of 10 years, everything is OK.Edited by IOSEFINI - 1/1/11 at 11:32pm