5gpu 2psu scrypt mining rig shuts down 1hour later

[jaitor]

I built the following rig:

5x SAPPHIRE TRI-X R9 280X 3GB GDDR5 OC (UEFI)
1x AeroCool Templarius Imperator 1150W 80 Plus Gold
1x HighPower Tech 1200w Gold Plus (HP-1200-G14C-GOLD)
1x Gigabyte GA-990FXA-UD3 motherboard
1x W.D Caviar Green 500GB SATA III HDD
1x Kingston KHX1600C9D3B1/4G
2x Unpowered risers 1x 16x
3x Powered risers 1x 16x

I have the templarius PSU powering the motherboard, the HDD and 2x GPUs with unpowered risers. The other 3 gpus are powered by the 1200w PSU and connected to the powered usb risers.

I Installed Windows 8.1 and plugged one gpu. It automatically installed the Radeon HD 7990 driver. Then connected the second gpu and followed the same process with the other gpus.

I then executed cgminer and everything looks stable at 740Khs each.

However 1h later the entire rig turns off. It always shuts down aprox. 1h later..

i suppose its not a power supply problem..

Regards,

[Remember remember the 5th of November]

Is 1200w even enough for 5 cards? But also check the temps, I've never ran a miner without increasing the fanspeed manually, since AMD cards never increase it enough.

[siggy]

exactly 1 hour later?  sounds to me like a power setting... going to hibernate after 1 hour of inactivity or something like that...

Sigg

[Fraxinus]

apt-get install wicd
apt-get remove network-manager*

This will set your bamt to static ip, helped in my case.

[Monty-Python]

I had the same issue with my rig at the beginning. These settings solved the issue:

1500 / 1035 is the combination that works on most 280x with tc 8192 also update your driver.

this always gives results above 700kh/s

Code:

 -I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-engine 1035 --gpu-memclock 1500 --auto-fan --temp-cutoff 95 --temp-overheat 75 --auto-gpu

but make sure you've got the latest amd driver and if it's a beta driver try the one before that.

Read my first post to find similarities, I am also using Toxcis. Rig has been running stable since.