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tips for overclocking 7950 please

Geo-Gamer said:
ahh ok thanks :)

Thats the thing people are saying that bios is voltage locked at 1.25? Thing is i can move mine up and down and i got that bios...unsolved mystery lol
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Yeah theres a lot of people saying different things, but for me it was voltage locked
 
here's a tip: benchmark programs (at least 3dmark11, firestrike, unigine heaven/valley, amd leo demo) are worthless(!!!) at determining game stability. kombustor and furmark at least determine the max temps you could encounter, though that's unnecessary, and you shouldn't run them.

crysis 1 loop is actually very decent - i've found the voltage and overclock values i get from it exactly match what's achievable in other games. regarding benches i have literally been forced to increase voltage by 86mv one time to reach a game stable overclock where 3dmark11, heaven, and leo were able to run for hours. in the same vein i have been 1200mhz benchmark stable, where games crash with anything above 1125mhz. i've had 3 tahiti core cards, on 2 operating systems, with a variety of hardware configs (because i had to test my first two cards in other systems before rmaing them) and this remained true on all, even with benchmark software, and driver updates. valley recently came out and i hoped it might be different. using it to verify an unvervolt, it ran for 2 hours at 881mv without issues, which is ridiculous considering i needed 893mv in the end to be stable for movies using hardware acceleration. i then needed 906mv to be stable in a game for just 40 minutes.

benchmark tools are ONLY for benchmarking, and running them for hours only has the potential to degrade your hardware.
 
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I'm using a xfire setup 7950s and I notice that in afterburner when I select the second card in the drop down the limits on the card are much lower. However I flashed the BIOS of this card to F42 (was FZ1). Is it just a xfire thing or do you think the card has a restriction on it?

I also can't get my memory past 1350. I could up the volts but effort.
 
chris-82 said:
Explain? And why shouldn't u go anywhere near 1.2v? Loads of people do including me I think this is more opinion than fact tbh.
I run my card @ 1150/1450 24/7 @1.225 1250/1580 max mine is a 59.99% ASIC card.

People do to over the 1.3v limit but I really wouldn't recommend it(generally with wc loops)i would try to stay around 1.25v or below aslong as temps are good (generally the vrm temps create instability before the core temp in my experience.

I've not upped the volts on my memory and generally don't see much point in ocing the memory too much as he speed and bandwidth is plenty even when the core is overclocked u hardly see a difference in benchmarks let alone in a gaming environment.
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Maybe read what I said? :p for his Overclock he aiming for 1100 you will not need 1.2v
I was just giving him an example what to aim for on the voltage.
 
I'm using AB for my TF3 V1

1100 core 1500 mem @ 1.163 volts (stock is 1.093)

Temps generally now around 70 degrees playing BF3 unless the heating kicks in (my pc is by a radiator now) :eek:
 
I can barely run my xfire at 1100 at 1.2v. How are you guys doing this!

Damn Windforce cards. You were supposed to be good and then they started making them sloppy.
 
My 7950 does 1100 @ 1.075v and when i bench it does 1200 @ 1.193v. Stock is 1.056v. I have the Sapphire Dual X 950MHz Edition.

Guess if i stuck it under water i could clock this thing fairly high :)
 
MyBrains said:
My 7950 does 1100 @ 1.075v and when i bench it does 1200 @ 1.193v. Stock is 1.056v. I have the Sapphire Dual X 950MHz Edition.

Guess if i stuck it under water i could clock this thing fairly high :)
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Yeah them voltages were pretty similar to mine, it did 1200/1575 at stock which was 1.17v went on to 1320/1960 top benchable under water, so ya could be looking at summat similar.
 
Hey guys,

I finally got my card installed which was a mission because it was to big for my case.

I have voltage control 1.3v max core and 1.7v max memory :)

For some reason the core clock only goes to 1100mhz any ideas?



edit;
msi afterburner will let me have 1.3v core but only goes 1100mhz max
asus tweek will only let me have 1.1v core and has 1700mhz max

How do I get the high clock of asus and the high voltage of msi afterburner at the same time?
 
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To extend the sliders (more overclocking headroom higher clocks) go to properties in the shortcut for afterburner add /xcl on the command line save/apply come out click on the shortcut it should say the limits have been increased go back into the properties of the shortcut remove the /xcl apply reboot computer voila!
Hope this helps
 
chris-82 said:
To extend the sliders (more overclocking headroom higher clocks) go to properties in the shortcut for afterburner add /xcl on the command line save/apply come out click on the shortcut it should say the limits have been increased go back into the properties of the shortcut remove the /xcl apply reboot computer voila!
Hope this helps
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Thanks mate :)

That sorted it
 
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