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Overclocking question for HIS 7950

Temp.sgk

Temp.sgk

Temp.sgk

Associate
Joined
26 Jun 2011
Posts
416
So after overclocking my card, played warframe and at a random length of time in the mission, it says Display driver AMD has stopped responding and has recovered.

So I loaded up valley benchmark, just kept it running for quite some time and I got this warning as well.
I do know it is my overclock setting as I tested without OC and its fine, but don't know how to approach it. Should I decrease my core speed+decrease voltage or increase voltage and see if I don't get this problem?

I don't think its the gpu memory as I tested using valley benchmark at default memory settings, with the core speed+volts at Overclock.

Using a HIS iceQ boost 7950 OC at 1100/1500 with afterburner at 1.206mv. I flashed my bios so I'm using a no boost.

The weird thing is, during overclocking, there was no problem with valley benchmark, however just running valley for a random amount of time, without bench I have this problem. Probably I miss that while only relying on valley bench to OC.
 
Overclock your core clock before the memory, as the memory bandwidth on the 7950 is already good so should be done last. Have you increased the power draw to the maximum? A 7950 should manage 1100MHz without any real difficulties.

I find Heaven 4 to be a better stress test than Valley.
 
Try upping the voltage to 1.25v and see if it's stable. I've found overclocks to be fine in Valley but crash in Heaven 4, so I'd try that as well.
 
If i really want to fry my card i am using Metro benchmark with everything on max...
 
The reason for this is every game and benchmark create different stress levels on the card so I can make it through benchmark runs and then crash in game sleeping dogs always used to crash my supposed stable oc on my gpu that was fine with everything else.

You will find you will come across a game sometimes that will make your oc crash and sometimes drivers can also change your oc stability(for better or worse)

Personally I benchmark a oc if it's sable then I do real world tests!( playing games it's what I bought it for after all!) u will find it will crash fairly quickly or crash after 30 mins a hour plus or its fine remember this can change from game to game depending on how on the limit you are and the game.


In afterburner make sure your slider to 20%
Did you get any lines down the screen or did it just lock up,shut the game down? If so I would say its most likely the core you're having issues with.

Personally for gaming I wouldn't bother running the memory any faster than 1450 as I don't think you will get any real world gains for going higher as has already been said the memory bandwidth is already very good.(obviously if doing benchmarks you want to run as fast as u can before memory correction or instability kicks in)

It looks to me that u have reached the limit of the core with that voltage.
Before I suggest you upping your voltage what temps are u running? At idle and under load? Below 75c under load is fine

As Tepic has said max I would be going on air and with okay temps would be 1.25v,now step up the volts to make your current oc stable (just play the game it was crashing on when it crashes/if it crashes up the volts slightly rinse and repeat untill it doesn't crash)

When u have found the volts to keep that core speed stable write them down afterburner for some reason doesn't save profiles properly (well doesn't for me).

If you then decide you want to push for more u can go either two ways up your core by 20-30 at a time and then do the rinse repeat method above or go straight to 1.25v and just keep upping your core untill its unstable then back off a little untill its stable say 10-20mhz roughly when doing either method make sure to be keeping a eagle eye on temps this will be the killer! (Aswell as excessive volts but you will be in the safe zone regarding volts aslong as heat is under control)

When doing this reset your memory to stock and once you have reached max core vs volts and temps and capability put your memory back upto the 1450 or whatever u wish and check for stability.

Hope this helps

Chris
 
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Idle is 32c, max under-load is 68. It says that Display driver AMD has stopped responding and has recovered. Actually not very bad, It dosen't crash my system so I could easily fix, in warframe it justs freezes but I can ctrl+alt+delete and come out of it. I plan to have very stable 1100/1500 clocks, I won't go any further.

Anyway I'll try the suggestions today and see if it fixes.
 
id drop the memory a lot have shown it really doesnt increase fps much and it may make your oc more stable . or it may need a notch up.
 
The memory overclocks on the 7950 only seem to make a difference to me in eyefinity resolutions and even then its small, in games I don't notice any difference between 1200/1600 and 1100/1500 which is what I run daily as the 1200/1600 needs too much volts imo.
 
Temp.sgk said:
edit: for the memory I don't have to change the memory voltage, can do 1500 at stock memory voltage.
Click to expand...

I think that's the culprit, the Ice-Q's weak point, the vram isn't the best.

As said drop the vram clocks, I run mine@1300MHz now on stock voltage for stability, if you want to run@1500, up the vram voltage.
 
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Try it in steps. 1.21v first, then 1.22v. Up to 1.25v is no problem.

Also, reset the memory clock to stock, as above.
 
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I wrote that guide you linked. The problems you mention sound like too little core voltage. What you need to do is gradually increase the core voltage until the display driver crashes stop. You should also leave your memory at stock 1250mhz until you have your core clock 100% stable.
 
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