XFX 7950 DD BE Low GPU usage, low frequency, fps drops.

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DJready

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Jul 13, 2010
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I got XFX 7950 DD Black Edition

Rest of PC specs:
FX 6300 4.4GHZ (perfectly stable prime95 in games, not overheating)
8Gb DDR3 1600Mhz
500Gb HDD
Chieftec APS-550S, 550w.
XFX 7950 DD Black Edition STOCK clocks out of the box.

So the problem is if i have power limit set to +0 It will throttle down in games and unigine frequency will drop bellow 700Mhz and the GPU usage will be jumping all over the place. I have to manually change power limit anywere betwen +14 to +16 to have GPU frequency normal at stock 900Mhz and gpu usage steady at 96-99%.

The biggest problem with upping the power limit is temperatures once i up it to +16 the temps in games like BF4, Watch Dogs get 71-73c with fans at 60%

I wonder if there was any sort of fix that dosen't need upping the power limit to work properly?
 
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DJready

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I know the temps are within normal but the fact that i have to increase power limit to 14 to 16+ on stock to have it work according to the specs of gpu. If i wanted to overclock gpu any more than 900Mhz would mean over 80c, i already have good fan curve set in MSI AB.

But what i'm puzzled the most why do i have to manually increase power limit, shouldn't the GPU work according to its specs as it should right out of the box.
So thats why i'm wondering if there is any fix by XFX, AMD, or anyone else that fixes the the use of power limit and works like it should from 0+.

This isn't the only case, many of 7950 has this issue and it's already been reviewed on:
http://www.overclock.net/t/1394623/belials-comprehensive-guide-to-7950s
 
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coozie7

coozie7

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Your card is actually 100 MHz overclocked, the original reference frequency for a HD7950 is 800/1250 and that may be the underlying issue-you have an overclocked card that needs that little extra power to run properly.
Increasing the power limit won't hurt the card, but it'll stop the throttling, which is why you're seeing the higher temperatures with a raised limit.
I have the stock clocked card shown in the Overclock.net article and they're quite right about that blasted cooler, even at 800/1250 it sounded like a jet fighter on takeoff and STILL hit 75C under gaming load, even here in cool, damp England.
The solution: http://www.quietpc.com/gel-icy-vision-amd Add one Zalman FanMate controller, set it to 1700 RPM, OC to 950/1400 and now I get 65C under Metro LL benchmark, in almost total silence. :)
One last possible point, maybe the PSU is causing the card to drop out? It's not a top tier unit and you're running a pretty highly strung rig, any way you can test with a stronger unit to conform/deny it is the culprit?
 
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DJready

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Yeah but the max Thermals aren't reached yet, Card won't throttle down until it reaches 85-90c, I am far away from that like i said 71-73c, so it's beyond thermal throttle. Even if i clock the frequency down bellow the spec to 850Mhz which is bellow the rated spec of 900Mhz it will still throttle to 300-700Mhz even tho the temps are 64c, which ofcorse is the problem with FPS drops with all that jumping.

Agean i'm not trying to overclock the graphic card just want it to run at STOCK as it says on the box without need for power limit fix.
Because running at power limit +0 will allow me to run the fans slower and still have decent temps and less noise.
 
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RobCrezz

RobCrezz

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I dont know about AMD, but Nvidia GPU boost also throttles on power target, so it will clock it down if necessary to maintain the set power limit, eg. 200w.

If you want the fans quieter then just adjust them so it doesn't go above 40% fan speed until 80'c.
 
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DJready

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If thats the case how can i set to non boost version of 7950. Cause the old GPU's didn't have that kind of limit i could clock the hell out of my old GTX 460 and still would not throttle or clock down.
Thats the thing i wouldn't want it hitting 80c specially since i like to play long time. I would rather stay in low 70s. Which i can acchive with power limit 0+ but the GPU at that setting just throttles down GPU usage and GPU frequency even at stock frequency or bellow that.
 
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