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snowcrashed (OP)
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May 29, 2013, 03:55:50 PM
Last edit: May 29, 2013, 05:45:24 PM by snowcrashed |
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I recently changed my rigs motherboard from a ASRock FM2A85X to GIGABYTE GA-F2A85X. Currently using a Sapphire 7850 and 7950 and an APU, running BAMT as OS. I'm have very strange issues with stability and temperature. When I start mining, the cards may work for a minute or two and then the system will reboot. At this point the temperatures are well below acceptable levels, under 70C. If it does get past the first minute or two, the cards will get gradually hotter and hotter up to 80C and then the systems will restart. If I disable the APU/7850 and lower the intensity of the 7950 from 19 to 13, it will run stable but the temperature gets higher than when I was running everything on the ASRock motherboard.
The cgminer settings I'm using are the same as what I ran while using the ASRock motherboard, so I don't think it's that. And the space the two cards have between each other on both motherboards is the same, so I don't think they are ventilated any differently. And I should note that with the ASRock motherboard, I had this rig running for days at a time and it was stable at good temperatures (~72C). Also I've been through the BIOS to see if there's any type of temperature cutoff thing and I haven't found anything.
What could be causing the issues I'm having? I've included my cgminer.conf just in case there's something weird going on.
"intensity" : "19,19,19",
"vectors" : "1,1,1",
"worksize" : "256,256,256",
"kernel" : "scrypt,scrypt,scrypt",
"lookup-gap" : "2,2,2",
"thread-concurrency" : "22336,4000,8192",
"shaders" : "1792,0,1024",
"gpu-engine" : "1125,0,1100",
"gpu-fan" : "0,0,0",
"gpu-memclock" : "1575,0,1350",
"gpu-memdiff" : "0,0,0",
"gpu-powertune" : "20,0,0",
"gpu-vddc" : "0.000,0.000,0.000",
"temp-cutoff" : "95,95,95",
"temp-overheat" : "85,85,85",
"temp-target" : "75,75,75",
"api-listen" : true,
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
Edit: I've also tried mining under Xubuntu 13.04. The system appears to be stable at Intensity 13 (which means a loss of 350 Kh/s) with the temperature for the cards at 71-73C. The 7950 fan is running at 2800RPM, the 7850 at 3800RPM. This is still hotter temperatures and faster fan speeds than what I mining at 20 intensity on the ASRock motherboard. What could be causing such a difference in temperatures between the two motherboards?
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