Hey there,
I'm still quite new to crypto currencies and mining and I've been searching Google and multiple Forums for a solution up until now - but my rig still is not running. My apologies for any spelling mistakes and wrong grammar but english is not my native language.
First my setup:
Asrock H61 Pro BTC /w Intel G645T
4GB RAM
1000W ENERMAX PSU
x1 to x1 riser cables
Windows 7SP1 (total Linux noob with no knowledge at all)
CGminer 3.7.2 / Catalyst 13.12
1x ASUS R9 280X DC2T
2x Sapphire R9 280X Toxic
Initial setup with the ASUS and one Sapphire was running just fine with 780KH/s for the ASUS and 600KH/s for the Sapphire. I created two separate folders for CGminer and started two sessions with the following settings:
ASUS:
del *.bin
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
...\cgminer.exe --scrypt -o -p X -d 1 --lookup-gap 2 --thread-concurrency 8192 -g 2 -I 13 --auto-fan --gpu-fan 30-85 --temp-cutoff 85 --temp-overheat 80 --temp-target 72 --gpu-memclock 1800 --gpu-engine 1150 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale
Sapphire:
del *.bin
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
...\cgminer.exe --scrypt -o -p X -d 0 -I 13 --lookup-gap 2 --thread-concurrency 8192 --gpu-memclock 1875 --gpu-engine 1160 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale
I was wondering why the Toxic was running at 600 only - but hey, it ran stable so I didn't care then and temperatures and everything were all fine. Today I installed the second 280X Toxic and the system keeps crashing after about 20 minutes. I created a third CGminer folder and started mining with these settings:
del *.bin
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
...\cgminer.exe --scrypt -o -p X --shaders 2048 -I 13 --gpu-fan 65 --no-submit-stale
You will notice that I set shaders instead of TC, as it was suggested on some pages I went looking for a solution. Here a screenshot while the miner is still working:
GPU 0 and GPU 1 are the Sapphire - unfortunately with different BIOS, GPU 2 is the ASUS - all working at default clocks
Any help configuring this rig to run stable around 2.1MH/s (700KH/s each should be possible as far as I know) is greatly appreciated. As I am still quite new in this business the reward will be somewhat limited to the ammount I was able to mine until now. PM me if you need any further information like screenshots or configuration information.
Thanks in advance if you read the whole post and are trying to help.
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