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Got a 7970 how do i Overclock it?

post #1 of 14
Thread Starter 
Hello guys, i managed to get an HD7970 for $350 at a sale and i've been an Nvidia fan since i started gaming and upgraded from my 4870. AS you can see in my Sig Rig i have 2 570's that i just took out.

This is more of a test drive for AMD i figured i'd get a cheap 7970 and see how they fare against Nvidia but enough of that.

How do i get this bad boy up to speed? What are some general expectations that most 7970's land on? I just spent the most of my day changing my PC case as well so i really just want a quick and dirty OC so suggestions would be nice before i hit the sack.


Thanks.
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post #2 of 14
Very nice deal thumb.gif. This thread might help a lot when oc'ing the 7970:
http://www.overclock.net/t/1265543/the-amd-how-to-thread
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post #3 of 14
Assuming you have downloaded Catalyst control center and swept all your nvidia drivers using driversweeper:

Open it, go to "performance" or whatever tab the OC settings are in (my desktop isn't nearby and I can't remember the name of the tab) and crank clock to 1100 mhz or so, memory to whatever looks good, and voltage to whatever looks good. Also bump fan speed if you can tolerate the noise.

Sorry for the non-scientific answer, but the awesomeness of your overclock will really depend on luck. You will have to fine tune the OC yourself (if you bluescreen, either drop clocks or bump voltage).
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post #4 of 14
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post #5 of 14
Thread Starter 
Thanks for the replies guys keep em' coming.
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Bender
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post #6 of 14
1) first choose your program you want to use, i prefer afterburner..
2) find a stable core clock while testing for stability by play a few games and do a 3Dmark11 run
3) then start to overclock the VRAM. for your vRAM try one OC then do a 3Dmark11 run on it repeat until your 3Dmark11 score goes down.. this means you are losing performance due to too much data been sent to the vRAM that it is using ECC. for example say your VRAM is set a 1600 and your 3Dmark11 score is 9000 the you try 1650 and your score drops to 8700 in 3dmark11 then you have found your optimal VRAM OC as in the example 1650 is losing performance due to ECC
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post #7 of 14
Thread Starter 
kept OCing and it kept crashing then i realized that the fan was not scaling quickly enough to match the temperature. was almost hitting 90c when the display driver crashed.

A quick Fan profile in Afterburner and it's responding much much better
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Bender
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post #8 of 14
Quote:
Originally Posted by th3illusiveman View Post

kept OCing and it kept crashing then i realized that the fan was not scaling quickly enough to match the temperature. was almost hitting 90c when the display driver crashed.

A quick Fan profile in Afterburner and it's responding much much better

cool yeah a fan profile/curve helps too... keep at it and keep us informed thumb.gif
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Going to be chaep
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Wife's Rig
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CPUMotherboardGraphicsRAM
i7-3770k Gigabyte GA-Z77X-UP5 TH MSI GTX460 G.Skill TridentX 2400 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
Plextor M5p 128GB 2 x WD 500GB Blues LG Prolimatech Megahalems Rev C 
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Arctic F12 CO PWM x 2 Push/Pull Windows 7 64 bit Ultimate LG IPS235V Corsair AX850 
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Coolermaster HAF 912 advanced (Asia version) 
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I5-3570K Gigabyte Z68X-UD3H-B3 Inno3D Ichill GTX660 8GB G.Skill RipjawsX 1600 
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Samsung 830 128GB WD black 500GB Liteon Coolermaster Hyper 212+ EVO 
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Win 7 ultimate Samsung Syncmaster 932gwe+ OCZ ZT series 550W Coolermaster 410 
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1.67Ghz Atom stock 1GB DDR2 2 x 500GB Western Digital Cavier Blacks [RAID 1] 
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post #9 of 14
Thread Starter 
After spending some time with this card i managed to get the following

1180Mhz core with 1149Mv (+20% PL)
As for memory i just put it at 6200Mhz because i don't know how fast this stuff can go on average and my GTX570s can only manage 4000mhz QRD

Good news is it goes like hell. Its a very very fast card and it plays battlefield 3 much much smoother than my 570's can. There is almost no stuttering and i managed to get High-Extreme settings to run in the 100-120 Fps range and it was awesome.

Bad news is it is Loud as hell too. The card reaches around 70c with a 60% fan speed and that's when things start getting irritating, I don't know if its louder than my 570's (One was reference the other TFIII) because i use a new case but it is very audible and definitely comparable to SLi noise.
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Bender
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Asus MG279Q Logitech G510  Corsair TX750 CM II 690 Advanced 
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post #10 of 14
You could grab an arctic accelero cooler for it. I have one on my 6990 and it works like a dream. Other than that, just try to make sure that your GPU isn't starved for air in your case.
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