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Cannot get 99% utilization on 7950 Boost - Page 2

post #11 of 32
Quote:
Originally Posted by GoLDii3 View Post

Im 99% sure its the boost function. Have you applied any overclock to the card?

Those boost models tend to boost from 850 MHz to 925 causing stuttering.

Try disabling ULPS and using the power control slider to 20%.

Just for curiosity,you have this card? http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1841&psn=&lid=1&leg=0

ULPS would not matter, he's not using CrossFire-X.
But yeah, the Boosts feature could be an issue. I've heard that before.
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post #12 of 32
Quote:
Originally Posted by xxpantherrrxx View Post

I will run these when I get home, I am currently at work.

yah, go back to work. that might be a good idea. not worth losing your job. lol
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post #13 of 32
Thread Starter 
I've tried it at stock and with a small overclock to 1000mhz. No difference, and the power slider is maxed out at 20%. I have also used MSI afterburner.
post #14 of 32
Thread Starter 
Quote:
Originally Posted by GoLDii3 View Post

Im 99% sure its the boost function. Have you applied any overclock to the card?

Those boost models tend to boost from 850 MHz to 925 causing stuttering.

Try disabling ULPS and setting the power control slider to 20%.

If nothing else works you may try to edit the bios you have and delete the boost.

Just for curiosity,you have this card? http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1841&psn=&lid=1&leg=0

Yes that's the card.
post #15 of 32
Quote:
Originally Posted by xxpantherrrxx View Post

Yes that's the card.
Try changing to the 2nd bios with the bios switcher.

Use the GPU-z log to file function in the sensors tab and do a quick 3DMark11. You should be always at 925 MHz or whatever is the card maximum speed clock. If you see the core clock drops to 501 MHz or 850 means your card is throttling. You should use the bios that is non-boost and has a lower vcore,because the other bios is the one with boost and 1,25V vcore with hits the card TDP limit so it throttles.

I had the same card and i couldn't use that bios because it throttled.
post #16 of 32
Thread Starter 
One thing I did notice strangely is that this card pretty much locked itself to a 60 degree temp limit, it would not for one reason or another go over 60 at all.

Where is the BIOS switch located at on the card?
post #17 of 32
Even though all hd7950 / hd7970 have a default 20% Power Slider, the actual Wattage that the slider ''extends'' is a pre-programmed value in the Bios.

Many brands tend to adjust that value, comparing hd7970 to hd7950 the ''Default without Power Slider max Wattage" looks allmost like its on purposely limited.

With the tool VBE7 you can edit both the ''Default without Power Slider max Wattage" and how far the % of the Power Sliders goes.
Check this thread for the tool: Ati Hd 7950/7970 bios mod thread

it can very well be the speeds / OC you are running cause it to ''power throttle''.

Basicly what i did was set my 'Default without Power Slider max Wattage" to 300W, and extend the Power Slider % to 50% maximum.
Giving me a total of 450W (insanely ''oversized'') for my card with 50% Power Limit.

So basicly i can run it at 0% Power Limit without the card ever throttling.

Example of the VBE7 Bios Edit tool with what i talk about:
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post #18 of 32
Thread Starter 
Quote:
Originally Posted by prescotter View Post

Even though all hd7950 / hd7970 have a default 20% Power Slider, the actual Wattage that the slider ''extends'' is a pre-programmed value in the Bios.

Many brands tend to adjust that value, comparing hd7970 to hd7950 the ''Default without Power Slider max Wattage" looks allmost like its on purposely limited.

With the tool VBE7 you can edit both the ''Default without Power Slider max Wattage" and how far the % of the Power Sliders goes.
Check this thread for the tool: Ati Hd 7950/7970 bios mod thread

it can very well be the speeds / OC you are running cause it to ''power throttle''.

Basicly what i did was set my 'Default without Power Slider max Wattage" to 300W, and extend the Power Slider % to 50% maximum.
Giving me a total of 450W (insanely ''oversized'') for my card with 50% Power Limit.

So basicly i can run it at 0% Power Limit without the card ever throttling.

Example of the VBE7 Bios Edit tool with what i talk about:

This was at stock settings it was doing it.
post #19 of 32
You could atleast try, Just back up your bios with GPU-Z.
Open it with VBE7 and edit the TDP (W) value either by adding 50W, or changing the Power Limit % max to 50%.

Either way it wont damage the card, and only potentially fix the problem, and perhaps extend the overclock limits. biggrin.gif

edit: Only do this if you have a card with bios switch, but i beleave all 7950/7970 have.

edit v2,
Or what could its just how AMD boost mechanism works on these cards, best thing to do then is to find a Compatible Bios without Boost for your card.
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post #20 of 32
Quote:
Originally Posted by xxpantherrrxx View Post

One thing I did notice strangely is that this card pretty much locked itself to a 60 degree temp limit, it would not for one reason or another go over 60 at all.

Where is the BIOS switch located at on the card?
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