so with my old 9100, I accidently set the core to 700 instead of 500 on time..finger slipped or something.. when I applied the settings, my desktop artifacted like there was no tomorrow.. It lost control.. upon a hardboot and restart, it clocked itself back down and ran fine with a moderate overclock for quitesome time. this was over a year ago, and now my friend is still using the system without a problem.
The core on the 7800gtx go is the same as what is used in desktop cards from what I understand. There are retail 7800gtx cards that are clocked near the 500 mark by default, so I wouldn't worry too much. Heat is your main concern, and with today's cards, as long as they're run properly, they are difficult to damage with heat, they clock down and whatnot. and against your fear of a decreased life span, if you continue to run at those clock speeds, they may reduce the lifespan from 12 years to 9 years, but it wont die tomorrow, and if you clock it back down, it could live closer to its original lifespan. All cards and cores are different, so you can never know for sure, but I would go for it..
Originally Posted by Inspiron9100
If you overclock a card to high ONCE, then is it done for good or?
for this question, if there were no procautions built into the card to downclock at high temps, the only worry I could see is damaging the thermal compound between the card and heatsink, and they are usually able to withstand temps well above what your card could handle without bursting into flame. I guess it's also plausable that a single pipeline could burn out and become unusable, but if this were the case, the system probably wouldn't boot.
regardless of what anybody says when selling a computer or video card, the card WAS overclocked. It's just something that people do. Curiosity. Most of them lie about it, so be glad your seller is trying to be honest. Look around on the forums. you'll see people with higher running overclocks, and even further failed attempts, and unless there was some major negligence, rarely do you see a thread about somebody killing the card strictly due to a single, high overclock