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safe power limit for the 7970 OC

post #1 of 9
Thread Starter 
is 20% a good power limit for the 7970 or maybe 10-15%?
post #2 of 9
Thread Starter 
Also what's TPD?
post #3 of 9
TDP is the thermal design power, it is a reference to how much cooling a part requires.
    
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post #4 of 9
TDP is the amount of heat the board will generate at its maximum load.

And Max Power Limit as it can make your card throttle, like if mine is on PL 0% I have seen as low as a 10% drop in frames as it takes the TDP into account. But i would test it out your self what % works best. Cause with my testing at my cards stock 925/1500 mhz it took only 10% to get its full power out of it. Only after hitting a 1ghz on the core did I have to go up to 20% as I am currently running at 1200/1600mhz @ 1.299v. If i had a watercooling I could probably go higher but probably not much.
 
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post #5 of 9
Just push it right to 20%. No point in anything else.

With my OC 20% wasnt enough and I need +40% with a registry mod. Its 1325/1.25v
post #6 of 9
Thread Starter 
Quote:
Originally Posted by terraprime View Post

TDP is the amount of heat the board will generate at its maximum load.

And Max Power Limit as it can make your card throttle, like if mine is on PL 0% I have seen as low as a 10% drop in frames as it takes the TDP into account. But i would test it out your self what % works best. Cause with my testing at my cards stock 925/1500 mhz it took only 10% to get its full power out of it. Only after hitting a 1ghz on the core did I have to go up to 20% as I am currently running at 1200/1600mhz @ 1.299v. If i had a watercooling I could probably go higher but probably not much.

I don't seem to be able to OC. I am new to OC do I tried max core and memory and ik that's not safe just want to see how much I can get but then crash on valley so then I start like 1100 core then like 1100 memory still crash lowered to like 1080 core 1390 memory crash like 1 min thru it ever time valley crash it freezes make bsod noise but no bsod. Lowered it to 1070 and 1385 no crash then bf3 gives me some directx error it I lowered it then to 1065 1380 no crash then windows 8 gave me system service expection bsod googled it found it was the gpu problem so I guess it was OC. It seems I only get 3 extra fps I want at least 10 fps more frown.gif
post #7 of 9
Have you increased voltage? Download HWInfo and use MSI Afterburner to overclock.
post #8 of 9
Thread Starter 
Quote:
Originally Posted by Derpinheimer View Post

Have you increased voltage? Download HWInfo and use MSI Afterburner to overclock.


Yes I have been using msi afterburner I was scared to upper my voltage because I heard it can damage ur gpu also I don't really know much about uppering my voltage
post #9 of 9
You should read this: http://www.hardocp.com/article/2013/02/10/sapphire_hd_7970_oc_edition_video_card_review/3#.Uhv1zT-vMoc

As for voltage, many cards come reference at 1.25v. But there is a chance you have a card like mine way below that [~1.05v]. Someone with card type 1 might say, "Oh I hit so and so on stock voltage!" and you wonder why you cant get near that.. Well, your stock voltage is a lot lower. Does that mean putting yours at 1.25v is ANY different than their card? No. Not at all.

But if you are scared of overvolting, then take the 1050MHz and stick with it.
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