[Reward] 3x 280X Setup - Help needed

[Monty-Python]

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:

Code:

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.

[1715576105]

1715576105

[1715576105]

1715576105

[grippy54]

I think the multiple cgminer instances is tough to manage personally. Why not try one, with a config. And consider moving to sgminer, some folks report higher khs.

Once you install sgminer, write the config. To do this launch sgminer with one of your batch files, then type S for Settings, then type W for Write config. Edit the config in the sgminer folder and put in something like I show below. Then restart sgminer without any arguments in your batch.

You’ll need to tweak the gpu-engine and memclock settings. As you can see, the values for them are separated by commas, but this should get you going.

{
   "pools": [
       {
           "poolname": "1",
            "url": "url",
           "user": "user",
           "pass": "pass"
       },
       {
           "poolname": "2",
            "url": "url",
           "user": "user",
           "pass": "pass"
       },
       {
           "poolname": "3",
            "url": "url",
           "user": "user",
           "pass": "pass"
       }
   ],
   "failover-only": true,
   "intensity": "13",
   "vectors": "1",
   "worksize": "256",
   "lookup-gap": "2",
   "thread-concurrency": "8192",
   "gpu-engine": "1150,1150,1070",
   "gpu-memclock": "1600,1600,1600",
   "gpu-powertune": "20",
   "gpu-threads": "2",
   "auto-fan": true,
   "temp-cutoff": "90",
   "temp-overheat": "85",
   "temp-target": "80",
   "queue": "0",
   "scan-time": "1",
   "expiry": "120",
   "api-port": "4028",
   "log": "5",
   "temp-hysteresis": "3",
   "kernel-path": "/usr/local/bin"
}

[foodies123]

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.

[Monty-Python]

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.

- DRIVER UPDATE: checked as 13.12 is the latest driver except 14.x beta (see above hidden somewhere in the wall of text ^^)

I am currently trying your settings. Is there a point that you don't set a target temperature or fan speed? Starting this config heats the GPU up to 75° and then hell breaks lose when all fans are set to 100% and take forever to calm down. Or is it just me again being impatient?

[pwpwpw]

I have 5 280x DC2T, and 3x GB 280x rev2, only this driver worked for me, the others never really gave high Kh/s. amd_catalyst_13.11_betav9.5.exe
Don't know anything about the toxics, but for the Asus, there are bioses that can reach 800kh++, I have them all flashed. msg me if need help.

[grippy54]

- DRIVER UPDATE: checked as 13.12 is the latest driver except 14.x beta (see above hidden somewhere in the wall of text ^^)

Don't use the beta drivers. There have been reports of it causing trouble with mining.

[Monty-Python]

After now 5 hours of mining, it seems to look quite well.



2.1MH/s stable with acceptable temperatures and high WU-rate. Foodies123, I owe you. ^^  I reset the display values to check if the hardware errors re-occur, temperatures went beyond 75° before air cooling fan was proper positioned. Now I am looking for long-term stability, next update tomorrow...

@pwpwpw
Definitely interested as I am planning to split the rig in the future to setup two separate rigs with only one GPU-/card-type. Are you using Linux or Windows? Will try to figure out that BAMT thing tomorrow.

[NameTaken]

Tips I found to increase my hashrate is using SGMiner 4.0 with optimized .CL and .BIN, use the iGPU and turning off the CPU's powersaving C-States in the BIOS.