Originally Posted by MainStageNews
Originally Posted by RagingCain
Yes it is normal. Not all things are even. The cooler your card is, the longer it can run at stable OC clocks. The more "intense" the card has to work, (note: that does not just mean running at 99%) the more likely the instabilities appear. Benchmarks are only synthetic representations of performance. What a user does with while playing is often much more challenging than any benchmark. For example, standing around in Crysis 3, and continuously spinning around 360, sinusoidally is extremely tough to render.
AMD drivers completely crash and are sloppily handled often throwing exceptions to the OS without a solid recovery method. This is the black screen afterwards.
Multiplayers are always reduced graphics but increased CPU load.
I think that covers everything. Reduce overclock or increase voltage. Stability is often dependent on the title/benchmark you are using and does not always translate well from program to program. Crysis 3 is a very intense GPU game on all fronts.
Wow great response Rep
I do have a few more questions. What would you suggest I do to get the highest OC possible in a game? Since im already getting near or at 80*C in Crysis (I really hate reference cards
) i dont want to increase the voltage more than I have. But I was thinking to slowly reduce my core clock my about 5 MHz at a time till I get something that dosent crash after 30min of playing. Good idea or would that take a long time to get the right OC? On another note im going to be setting up my first watercooling loop with in the month and I was wondering what the most voltage you would put into a 7970? Is it just until I get the temps past where im comforable or is there kind of like a level where if you go past in will severily decrease the longevity of your card? Thanks again.
Haha, I have one of the highest water clocks for Crossfire and I topped out around 1357MHz with 1.300V. I was a little lucky having two great cards (both references
Reducing clocks by 5 MHz will take long, try 10 or 15 MHz at a time. You are losing very very very small amounts of performance. You also have to understand that the original 7970 starts at 925 (even the 1GHz are the same hardware) so you are overclocked by 30%! You aren't getting any more performance and the numbers at this point are bragging rights. Temperatures is usually what kills cards. Too much voltage sure, but you need more voltage as temperatures increase to maintain stability, thereby in my mind, temperatures are to blame.
A good 24/7 overclock is not the highest overclock, its a good overclock, with very little additional voltage, that has great temperatures. Too high or too low is often pointless outside of benchmarks.
1100 MHz is good, 1150MHz at the same voltage and temperature would be better.
Benchmarking has little affect on card longevity, unless you go too far and kill it. It is how you run your card the other 99% of the time that usually kills the card. You don't need overclocks sitting on the forums for example. Unless Flash has gotten too bloated these days..
Regarding watercooling, best advice for that is talk to watercooling guys in the forums and get starting out info there. Keep in mind it is a huge investment.