95% chance, that the card are faulty...
Try to put only the faulty card in, and see what the miner/GPU-Z telling you
Topic: 2 x 6990's - Faulty Core???? (Read 1083 times)
Also possible its not getting enough power so underclocking its self.
Currently running 830/1250 so normal clock position on the cards.
Fractal Design Define R3
AMD Phenom II X4 840 (4 x 3.2 GHz) AM3 2MB
AMD Heatsink & Fan
Corsair 2GB XMS3 PC3-10666 1333MHz (2x1GB)
2 x ATI Radeon HD 6990 - (XFX) CrossFireX Setup
Asus Crosshair IV Extreme (AMD 890FX)
Motherboard Integrated HD Sound
Integrated Ethernet Lan (Broadband Ready)
Cooler Master 1000W Silent Pro
500 GB SATA-II HDD 7200 8MB
Samsung (SH-D162D) 16x DVD-ROM - Black (SATA)
Microsoft Windows 7 Professional 64 BIT
GPU-Z shots - Check out the shaders and texture fill rate?
??Good Core:
http://img585.imageshack.us/img585/2937/ok6990core.gif
Problem Core:
http://img600.imageshack.us/img600/1500/problem6990core.gif
Check out 8 CU on first core when starting Diablominer..
http://img607.imageshack.us/img607/8104/8cu.jpg
Have tried with and without Crossfire enabled with a dummy plug.... no joy.
Thanks
D
MSI Kombuster would mainly be good for checking heat as it uses OpenGL, which generally will not show artifacts or crashes.
Also try without crossfire.
Post your entire rig setup, that is pretty power hungry so its possible.
Also possible its not getting enough power so underclocking its self.
Run MSI Kombustor its good at picking out artifacts, also Miners aren't fond of Crossfire set up's.
I know mine makes CPU usage, tho I don't need a dummy plug.
I know mine makes CPU usage, tho I don't need a dummy plug.
Definitely possible. Try playing some intensive 3d game or running a 3d benchmark such as Unigine Heaven to see if any artifacts appear or the GPU crashes the game/program.
Hi Guys,
Some help please...
Running 2 x 6990's in crossfire mode on Win 7 64.
3 cores are running @ about 350mh/s each but have one core that runs @ 125mh/s only.
I have noticed that when running Diablo miner I get 8 CU on the core instead of 24 CU on the other 3.
MSI Afterburner reports the core at 99% capacity but only reaches 55C temp... this surely is not running properly.
I think that it maybe a faulty core but just checking with you guys that you have not come across this before.
Any ideas?
Best
D
Some help please...
Running 2 x 6990's in crossfire mode on Win 7 64.
3 cores are running @ about 350mh/s each but have one core that runs @ 125mh/s only.
I have noticed that when running Diablo miner I get 8 CU on the core instead of 24 CU on the other 3.
MSI Afterburner reports the core at 99% capacity but only reaches 55C temp... this surely is not running properly.
I think that it maybe a faulty core but just checking with you guys that you have not come across this before.
Any ideas?
Best
D
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