XFX R9 280X low hashrate
I recently got myself an XFX R9 280X card solely for mining litecoins. the system it is connected to is a core 2 duo E8400 , 4GB Ram, 550Watt psu. Windows 7 and bfgminer 3.8.0
the config looks like this.
setx GPU_MAX_ALLOC_PERCENT 100
bfgminer --scrypt -o http://ltc-eu.give-me-coins.com:3333 -u user -p pass --thread-concurrency 24000 -w 256 --gpu-engine 1100 --gpu-memclock 1500 --gpu-powertune 20 --gpu-fan 100 --auto-gpu -g 1 -I 18
I get around 500kH/s with this, but I should be getting > 700 kH/s.
I have tried setting thread concurrency to 8192, I have also tried g 2 and I 13 as most do, no change in hashrate, it seems to cap at around 500 no matter what I do. setting I above 18 does nothing.