AMD Radeon 7950 / 7970 Overclocking club

yasamoka · 2013-04-01T09:31:48+00:00

Post here your system spec, HD7950 / HD7970 overclocks, voltages, temperatures, if you have replaced the stock cooler, any further suggestions for OCing. Ben...

yasamoka

Hahah good good, I was steamed!

chassis

hey guys, do you think an XFX Core Edition PRO850W , will be sufficeint to power 2 vapor-x 7950's ...my other system specs are i5 2400..a z77 mobo (probably the extreme 4) 8 gb hyper x ram 1600mhz...4 8cm red led fans and on 23 cm red led fan...1tb hdd..and im going to add a hyperx ssd 120gb (i finally found one in lebanon :) ..thanks in advance

here is a link to the psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817207011

yasamoka

chassis wrotehey guys, do you think an XFX Core Edition PRO850W , will be sufficeint to power 2 vapor-x 7950's ...my other system specs are i5 2400..a z77 mobo (probably the extreme 4) 8 gb hyper x ram 1600mhz...4 8cm red led fans and on 23 cm red led fan...1tb hdd..and im going to add a hyperx ssd 120gb (i finally found one in lebanon :) ..thanks in advance

here is a link to the psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817207011

Yes it definitely can. Where are you getting this PSU from? pcandparts has the non-pro 850W version.

chassis

no actually pcandparts have the core edition pro version...(XFX P1-850S-NLB9 850W PSU) ....they have the same model number

chassis

hello again, i have finally got around to overclocking my 7950, the best I could get out of it is 1130 gpu core and 1425 memory.....I got it stable at1150/1450@1.25v in heaven benchmark but it started showing some artifacts in battlefield 3 so I dropped it to 1130/1500 @ 1.25v and its still stable in heaven benchmark but in game some artifacts were visible...so the only way I could achieve stability in benchmarks and in game was to set it at 1130/1425 @1.25v and in all the the tests I ran ,temps NEVER bypassed 58degrees :)......my question is can I go higher than the 1.25v maybe up to 1.3v? or is it not safe...how about my oc? are the results any good?? thanks :)

yasamoka

I recommend you stress-test with OCCT. Start with the lower voltages / clocks that you have deemed to be stable, and go up from there.

1.3V is safe, I don't recommend such a high voltage for 24/7 operation though. But it can be done. Some 7950s and 7970s are coming at a stock voltage of around ~1.25V, so we can deem that safe at least.

What's your ASIC again? Did you get a second card? Are you OCing the first card, the second card, or both?

Core clock is king; OC that first, then work up the memory.

chassis

My ASIC is 54.1%...im overclocking this card alone not the second one....ive searched around and everyone seems to get to 1200/1500 with no big hassle but mine simply won't on 1.25v....isn't the voltage related to temps so if temps remain low you can increase the volts?

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