Hi guys,
I seem to have run in to an issue which I can't solve alone.
Hardware:
- 4 x Sapphire HD 7950 3L
- Gigabyte GA-990FXA-UD3
- Lepa G1600 PSU
- 4GB ram
- 2 x non-powered risers
Software:
- Litecoin BAMT
http://forum.litecoin.net/index.php/topic,2924- 13.4 AMD Drivers
- CGminer 3.1.0
Situation 1:cgminer.conf
"intensity" : "17,20,20,20",
"vectors" : "1,1,1,1",
"worksize" : "256,256,256,256",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"lookup-gap" : "0,0,0,0",
"thread-concurrency" : "20480,20480,20480,20480",
"shaders" : "1792,1792,1792,1792",
"api-port" : "4028",
"expiry" : "1",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1,1,1,1",
"gpu-engine" : "1115,1115,1115,1115",
"gpu-memclock" : "1500,1500,1500,1500",
"gpu-powertune" : "20,20,20,20",
"auto-fan" : true,
"temp-cutoff" : "95,95,95,95",
"temp-overheat" : "85,85,85,85",
"temp-target" : "75,75,75,75",
"log" : "5",
"no-pool-disable" : true,
"queue" : "0",
"scan-time" : "1",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
Hashing Speed:GPU0: ~
600GPU1: ~
660GPU2: ~
660GPU3: ~
660Situation 2:cgminer.conf
"intensity" : "20,20,20,20",
"vectors" : "1,1,1,1",
"worksize" : "256,256,256,256",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"lookup-gap" : "0,0,0,0",
"thread-concurrency" : "20480,20480,20480,20480",
"shaders" : "1792,1792,1792,1792",
"api-port" : "4028",
"expiry" : "1",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1,1,1,1",
"gpu-engine" : "1115,1115,1115,1115",
"gpu-memclock" : "1500,1500,1500,1500",
"gpu-powertune" : "20,20,20,20",
"auto-fan" : true,
"temp-cutoff" : "95,95,95,95",
"temp-overheat" : "85,85,85,85",
"temp-target" : "75,75,75,75",
"log" : "5",
"no-pool-disable" : true,
"queue" : "0",
"scan-time" : "1",
"scrypt" : true,
"shares" : "0",
"kernel-path" : "/usr/local/bin"
Hashing Speed:GPU0: ~
630GPU1: ~
630GPU2: ~
630GPU3: ~
630Issue:
When I lower the intesity to 17 on GPU0, my other cards run at their normal speed.
But whenever I tune the intensity up to 20 on GPU0 the other cards start to hash way below their normal speed.
Extra information:- Before this I had a 7850 sitting in the same slot as a GPU0, I encountered the same problem.
- I do not have this issue when I use windows 7.
Kind regards,
Nick
