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7950 OC

P4Clock

P4Clock

P4Clock

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Joined
6 Feb 2010
Posts
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Barnsley
What are the basic OC's i should see with a 7950.

My old card msi r7950 was a boost casr so i just let it be, but it died and i have ordered a powercolour 7950 but it just a stock speed card so i would like to put a moderate OC on it, what should i aim for on a card that as no voltage control(or i dont think it dose its due for delivery today)
 
I expect it will have voltage control. You'll just need to use the PowerColor overclocking tool in order to use it. If not i can alter the bios for you to give you voltage control.
 
LtMatt said:
I expect it will have voltage control. You'll just need to use the PowerColor overclocking tool in order to use it. If not i can alter the bios for you to give you voltage control.
Click to expand...

:D, i know its a silicone loto but what sort of clocks should i been looking it.
 
old ones do anything upto 1000 or over the newer ones do 1100-1200 depends how good a clock you have.

i have one that does 1200 stock :D
 
i would like to get 7970 speeds and i would be happy. i have been told this is no problem for even a bad clocker
 
I do 1075/1600 with stock volts on my Dual X 7950 and its 100% stable. Slight bump up to 1075mV for the core gets me up to 1100 core stable.

Do u have 2x 6-pin power connectors or a 6+8-pin?

Usually the 6+8-pin's clock better anyway.
 
MyBrains said:
I do 1075/1600 with stock volts on my Dual X 7950 and its 100% stable. Slight bump up to 1075mV for the core gets me up to 1100 core stable.

Do u have 2x 6-pin power connectors or a 6+8-pin?

Usually the 6+8-pin's clock better anyway.
Click to expand...

2x6pin and 2x8pin
 
right the powercolour OC thing is crap, it dont run right and crash's all the time so i am using after burner.

I am a little unsure on what voltage changes i can make.

@stock card 800 core and 1250 memory
@ stock volt i got 1000 core and 1300 memory

i have not pushed to the point of fail yet i wanted to take some advice on the max voltage to use on stock cooling
also how hard should i push the memory
 
My 7950 does 1175/1600 at 1.185v for a reference. Any higher and I have to bump voltage a lot higher which makes it run to hot/loud for my liking.

Also, don't worry too much about memory clock as you only get small gains. Concentrate on finding maximum core clock first. Use heaven bench to test. Few loops and it should be stable. Also keep an eye on temps.
 
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i have been running furmark for 5min's just to get a ruff stable reading so i can try and find the max

now @ 1075core, 1300 memory(will stick at that till find max core)
volt @ 1.080, max temp 72c

i will download heaven bench now

What isthe option "power limit%" for ?, its set to 0% defolt
 
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wow wa wee wa..... "power limit %" is boss

all tests was run at 1100 core and 1300 memory 1.081mV

1, power limit 0% FPS min33, avg39, max48 Furmark 2003
2, power limit 10% FPS min34, avg39, max49 Furmark 2405
3, power limit 20% FPS min43, avg50, max59 Furmark 2928
 
Try not to use Furmark as it stresses the card to excessive and unrealistic levels. Think buying a shiny new car then sitting revving it to 5000rpm in the driveway for hours.
 
Yeah, pretty much. Ask guys like 8 pack who say to avoid using such program's and just using your PC. I've seen systems prime stable for hours crashing when web browsing.
 
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