I have three r9 280x cards. I use ubuntu server 14.04 and installed the amd catalyst driver using this guide as reference:
http://spacience.blogspot.com.tr/2015/11/gpu-mining-in-ethereum-1404-from-scratch.htmlI installed atitweak to set the clock speeds and needed to install a minimal X11 to set the clocks and to see the temperatures.
I put a script in cron run at boot to start xinit in a screen and set the clocks and start the miner in a screen too. it works very stable.
My rig has only 5GB RAM and 5GB swap space.
Thanks for the tips - used to mine on Ubuntu 14.04 (back when DarkCoin/DASH was still competitive with a GPU) with the Catalyst drivers and semi-automated with cron jobs and BASH scripts. If Win7 proves unstable I'll gladly spend an afternoon switching back to Linux. Aside from the girlfriend's gaming computer, the miner is actually the only Windows machine in the house (typing this on my laptop running Ubuntu MATE
)
What clock speeds did you end up settling in on with your 280x's? Did you just adjust core clock speed or did you play around with memory clocks as well?
Wow, thank you so much for those links! Tremendously helpful. Unfortunately though every dropbox link I've clicked in the Google Docs spreadsheet is dead :/
Hello again.
Here is my .sh script to set the gpu clocks: The first GPU is r9 270 and the others are r9 280x.
miner@rig1:~$ cat set.sh
echo "setting clocks and fan speeds..."
atitweak --adapter=0 --set-engine-clock=950 --set-memory-clock=1400 -p "-20" --performance-level=all --set-fan-speed=100
atitweak --adapter=1 --set-engine-clock=1050 --set-memory-clock=1500 -p "-20" --performance-level=all --set-fan-speed=100
atitweak --adapter=2 --set-engine-clock=1050 --set-memory-clock=1500 -p "-20" --performance-level=all --set-fan-speed=100
atitweak --adapter=3 --set-engine-clock=1050 --set-memory-clock=1500 -p "-20" --performance-level=all --set-fan-speed=100
This script is run at boot after calling xinit. And miner starts 5 seconds after that script.
I set the fan speeds to 100% and let the claymore miner manage the fans too. after miner starts, the fans are running about 50% with about 65C temperature.
I played with the clock. if I put more that 1500 for mem clock, hashrate drops. below 1500 hashrate drops too, so I found it's optimal to set them at 1500.
1050GPU is good too. I can make it 1100GPU clock but hashrate increases just a little bit but power usage and heat rises so 1050 is good for me.
here is the output of atitweak -s command:
tim@rig1:~$ atitweak -s
0. AMD Radeon (TM) R9 200 Series (:0.0)
engine clock 950MHz, memory clock 1400MHz, core voltage 1.175VDC, performance level 2, utilization 98%
fan speed 41% (1306 RPM) (user-defined)
temperature 65 C
powertune -20%
1. AMD Radeon R9 200 Series (:0.1)
engine clock 1050MHz, memory clock 1500MHz, core voltage 1.181VDC, performance level 3, utilization 99%
fan speed 66% (3890 RPM) (user-defined)
temperature 65 C
powertune -20%
2. AMD Radeon R9 200 Series (:0.2)
engine clock 1050MHz, memory clock 1500MHz, core voltage 1.175VDC, performance level 3, utilization 99%
fan speed 56% (2167 RPM) (user-defined)
temperature 64 C
powertune -20%
3. AMD Radeon R9 200 Series (:0.3)
engine clock 1050MHz, memory clock 1500MHz, core voltage 1.175VDC, performance level 3, utilization 99%
fan speed 51% (2060 RPM) (user-defined)
temperature 64 C
powertune -20%
GPU 0 is Asus r9 270. stock bios.
GPU 1 is Asus r9280x DC2T. modified bios to lover voltage a little bit.
GPU 2 and GPU3 are Powercolor Turboduo r9 280x cards.bios modified for lower voltage.
I used VBE7 in windows to make bios modifications and used atiflash in a dos bootable flashdisk to reflash the cards.
I have a power meter on the plug and it shows 750watt total system running claymore zcash miner.
The r9 270 makes about 170 hashes and r9 280x cards makes about 290 ~ 300 hashes.
