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Title: 2 x 6990's - Faulty Core???? Post by: doodie on July 21, 2011, 07:44:53 PM 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 Title: Re: 2 x 6990's - Faulty Core???? Post by: Ryu.Hayabusa on July 22, 2011, 03:01:18 AM 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.
Title: Re: 2 x 6990's - Faulty Core???? Post by: Neokolzia on July 22, 2011, 05:10:00 AM 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. Title: Re: 2 x 6990's - Faulty Core???? Post by: bmgjet on July 22, 2011, 06:00:12 AM Also possible its not getting enough power so underclocking its self.
Title: Re: 2 x 6990's - Faulty Core???? Post by: Neokolzia on July 22, 2011, 07:09:19 AM Post your entire rig setup, that is pretty power hungry so its possible.
Title: Re: 2 x 6990's - Faulty Core???? Post by: organofcorti on July 22, 2011, 07:37:36 AM Also try without crossfire.
Title: Re: 2 x 6990's - Faulty Core???? Post by: Ryu.Hayabusa on July 22, 2011, 08:19:08 AM MSI Kombuster would mainly be good for checking heat as it uses OpenGL, which generally will not show artifacts or crashes.
Title: Re: 2 x 6990's - Faulty Core???? Post by: doodie on July 22, 2011, 10:28:40 AM 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 Title: Re: 2 x 6990's - Faulty Core???? Post by: PLaci1982 on July 22, 2011, 10:33:04 AM 95% chance, that the card are faulty...
Try to put only the faulty card in, and see what the miner/GPU-Z telling you |
