HD5970 not overclocking

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go7roo7

go7roo7

Honorable
Oct 4, 2013
16
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10,520
Hey guys, here is my issue. I have an AMD HD5970 card that I am trying to push a bit to get some better fps in BF4. Stock clocks are set to 725 core/1000 mem. I am running a dual screen setup, and whenever I OC the card, my second screen begins to flicker, and I notice my core speed at idle goes from 400 to about 125. As soon as I set it back to default it stops this behavior. The OC I am trying to get is about 800 core/1200 mem which is nothing insane and has been done before. I am not trying to kill my card here.

I am not sure why the card is downclocking itself to 125 when idle, though I know this occurs naturally to save power ( on stock clocks, it downclocks to 400Mhz), but I am sure this is the root cause of my screen flickering.

Also, I have tried Overclocking the card with MSI afterburner and Furmark to test. On stock clocks (if my memory serves me right) I got a 6000 @ 1080 with no AA. I will do another bench when I get home just to check. Now I tried raising the clock by 5Mhz and my second screen starts tearing and Furmark starts getting square artifacts. I bought this card in 2011 and it was discontinued shortly after I purchased it. The card has never failed me, so I am surprised that it cant even hold a 5Mhz OC without getting artifacts....

The rest of my components.

ASUS Crosshair V Formula 990FX
AMD FX-8150 @4.2
G.SKILL Sniper 8GB DDR3 1866
AMD HD 5970
Hitachi GST Deskstar 2Tb
Antec Kuhler H2O 620
CORSAIR CMPSU-850TX 850W PSU
NZXT Phantom (whorange)

Any help?

Thanks
 
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Chainzsaw

Splendid
Dec 31, 2002
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Some silicone is better than others. Yours just might not be able to handle overclocks very well. What are your NON oc temps vs OC temps? That may give you a clue to what is happening.

Check out this OC review:

http://www.anandtech.com/show/3590

Those 5970 VRMs run quite hot. You may be running into thermal bottlenecks which a 3rd party cooler may or may not help.

Basically I recommend not OC'ing your GPU.
 
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go7roo7

go7roo7

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Oct 4, 2013
16
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So I went quickly home for lunch and I read that AMD performance options can interfere with OC on this and other cards so I turned off all Performance enhancements and use MSI to OC. Guess what, it worked. I will post pics in a bit.

Some pics of stock clocks and OC clocks, temp and fur score






















 
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go7roo7

go7roo7

Honorable
Oct 4, 2013
16
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10,520
I could do that, IF there was an actual aftermarket cooler to use. I dont know why but all the aftermarket air and water coolers have dropped off the face of the world for this card. I cant even find anything used to help cool it.

I would love to add an arctic cooler accelero to the card but those arent made any more.
 
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go7roo7

go7roo7

Honorable
Oct 4, 2013
16
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Finally I figured it out. The card seems to have a cold bug.

While lurking on about probably 30 forums, I saw a post that someone wrote:


edi_2
Registered User

Hi, Its called a cold bug. Open catalyst and create a slight overclock (5mhz) preset. Name the file and go to c:/users/username/appdata/local/ati/ace/profiles

there will be your created preset there. open it with notepad and change values 15700 which is a core speed when idle to 40000. also change mem speed from 30000 to 90000. save it and run preset from catalyst.

now when idle your core will be set tro 400 and mem to 900 and this should fix your cold bug.

I got home, tried it and BAM! worked! Now when I try to OC the card, it does downclock when idling, but not to the point when the screen begins to tear or have any issues.

 
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