4th GPU crashing CG Miner (4x Gigabyte R9 280x OC edition)

[bsmack]

I'm running 4x Gigabyte R9 280x OC edition cards. They are all undervolted at 1.144. After about 5 minutes, the AMD driver will become unresponsive and restart, and during that, card 4 will crash and stop hashing (doesn't read dead or sick, but pretty much all the sensors stop working on that specific card). The rest of the cards continue hashing with no issue. Here is my config file:

Code:

"intensity" : "13,13,13,13",
"vectors" : "1,1,1,1",
"worksize" : "256,256,256,256",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"lookup-gap" : "2,2,2,2",
"thread-concurrency" : "8192,8192,8192,8192",
"shaders" : "2048,2048,2048,2048",
"gpu-engine" : "1037-1037,1037-1037,1037-1037,1037-1037",
"gpu-fan" : "0-85,0-85,0-85,0-85",
"gpu-memclock" : "1500,1500,1500,1350",
"gpu-memdiff" : "0,0,0,0",
"gpu-powertune" : "20,20,20,20",
"gpu-vddc" : "0.800,0.800,0.800,0.800",
"temp-cutoff" : "90,90,90,90",
"temp-overheat" : "85,85,85,85",
"temp-target" : "75,75,75,75",
"api-mcast-port" : "4028",
"api-port" : "4028",
"auto-fan" : true,
"expiry" : "1",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"no-submit-stale" : true,
"queue" : "0",
"scan-time" : "1",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",

I've tried downclocking the memory a considerable amount, but that doesn't seem to help.  The cards are powered by an 850w and a 1000w psu (2 cards each, planning on a 3rd card for the 1000w).  The mobo I am using is an Asus Z87 Pro with powered risers.  I should also note that the cards don't ever go above 75 C when the driver crashes.

[bjalbert]

Try the new catalyst 14.1 beta driver and see if that helps. I stuck a couple of those DVI->vga adapters in my cards and get better stability. I don't go the full route of sticking resistors and crap in there but it seems to work. Good luck I have had the same problems.

[bsmack]

Try the new catalyst 14.1 beta driver and see if that helps. I stuck a couple of those DVI->vga adapters in my cards and get better stability. I don't go the full route of sticking resistors and crap in there but it seems to work. Good luck I have had the same problems.

I have tried 14.1 beta and ended up reverting to the last final driver because I thought that might have been the issue.  14.1 beta gives me the same problems.  Unfortunately I can't physically get to the machine right now, but I will definitely try a DVI->VGA adapter when I get a chance.

[bsmack]

bump

Anyone have any more ideas?  I am trying to troubleshoot the miner remotely.

[bsmack]

bump again


Please, I need help getting this stable.

[bsmack]

.

[CMD7790]

What version of windows are you using?
How much system ram do you have?
Are you running CCC and all the other stuff or just drivers only?

I had a similar problem running 3 Sapphire 280x, The main display card would crash and lock up the system.
I went up to 6 GB ram and the driver stopped crashing. I had 2 GB and added a 4 GB stick. It might work with just 4 GB.

[howardb]

I have similar problem with cgminer 3.7.2, three cards fine/stable, forth card crashes or freezes system after only a few seconds of mining. Using Asus R9-280x on Asus P8Z77. If I switch to a P8p67 motherboard I can run four cards but it's unstable crashes from 10 mins to 10 hours randomly.

Using BAMT 1.2 with twin Seasonic 850w PSU. Just upgraded to latest AMD Catalyst beta drivers tonight, will see if that makes a difference. (Edit, no it didn't make a diff!)

Edit: Switched to Asrock H61 BTC motherboard, and it's rock stable with everything else the same! So P8Z77 seems to be the issue for > 3 cards