MSI R6950: A problem like no other... (Watch out: LONG POST!)

Crystalyzer

Honorable
Sep 10, 2013
6
0
10,510
Hello everyone,

I've got this problem for some time now, but it didn't really bother me untill I upgraded my system with a new CPU, Mobo, Ram and CPU-cooler (and a case.) These are my full specs:

CPU: AMD FX-8320 overclocked @ 4.14 GHz
Mobo: ASUS M5A97 EVO R2.0
GPU: MSI R6950 2GB TF3 PE Clock @ 800 MHz and Memory @ 1300 MHz
PSU: MS-Tech 750 Watt
RAM: Kingston 8 GB @ 2133 MHz
HDD: 500 GB Caviar Blue (not the problem, I swear)

Now for the problem:
As you can see i'm not running the GPU at it's stock 850 MHz clock speed. When I do this, my computer will freeze and show a screen as if looking at the side of a stack of colored paper (artifacts.) I have to turn it of by holding the power button and reclocking the card to 800 MHz on the next startup. THIS ONLY HAPPENS IN GAMES AND GRAPHICALLY INTENSE APPLICATIONS.
I also noticed that my Kmark scores are below average for my kind of graphics card when looking at the MSI Kombustor Score page. (X1350 and P2256)

When gaming at 800 MHz there are no difficulties. But it does bother me to lose 1/9 of my total clock (which is still about 11.11%)

After some research i found out that when I raised the core voltage to 1.200 V instead of 1.110 V i can run the card at 850 MHz and 1300 MHz for the memory. However when i try to raise the core clock further It locks up again!


Just to clearify:

YES I did update my drivers and have always kept them up to date. I have tried to reinstall them. I even tried the AMD Catalyst Beta drivers, which don't seem to do anything.

YES My GPU has enough power going to it.

YES My GPU is under full load in benchmarks such as Kmark, so it isn't bottlenecked in any way I know of.

I have tried about everything except for raising the core voltage even higher because that could harm the GPU. Could the card perhaps be damaged? It has always run in SLI before without any overclocking, before I bought it from a friend.


You are the true God of GPU's if you can help me with this increasingly anoying problem.

Thanks in advance
 
Solution
Sounds like a very unstable card if you have to up the core voltage to hit stock clocks, if your stable at stock clock with increased voltage I would just leave it. Clearly the card is not the best so keep don't try and overclock.

I would either send it back for replacement if it's still within the warranty, or look into buying a newer card. Unfortunately there isn't much you can do when the hardware is faulty.
Sounds like a very unstable card if you have to up the core voltage to hit stock clocks, if your stable at stock clock with increased voltage I would just leave it. Clearly the card is not the best so keep don't try and overclock.

I would either send it back for replacement if it's still within the warranty, or look into buying a newer card. Unfortunately there isn't much you can do when the hardware is faulty.
 
Solution




was just going to say that ahha.. I would say as well your card is dying. but is 1300mhz on the memory stock? sometimes cards cannot handle memory overclocks very well at all. The only time I had the same symptoms as you was from to high of a memory overclock and the screen would turn into a rainbow
 

Crystalyzer

Honorable
Sep 10, 2013
6
0
10,510
1300 MHz is the stock memory clock. Although the core clock above 850 MHz become a bit more stable when I lower the memory clock to, say, 1240 MHz. Still it crashes above 880 MHz
 

Crystalyzer

Honorable
Sep 10, 2013
6
0
10,510
Well, I found a solution :)

I wondered was wondering for a while why the card became more stable when i increased the voltage. However I was afraid to do so because I didn't know the limit.

Today I downloaded the driver recommended to me by MSI which is the Catalyst 08.00.0903...
This version seems very outdated, but it was uploaded to the MSI site last month.

I think I went a bit yolo, but I pushed the core voltage to 1.300 volts! Suddenly I was able to run the card stable at 900 MHz for the core, and 1250 MHz for the Memory.

The Twin Frozr 3 cooler really shows it's power here, because the card never went over 68 degrees Celsius! :D