I have a Sapphire r9 270x but just can't get over 75 kh/s without HW errors.
It's strange I can't set a thread concurrency over 1024. I thought TC was a multiple of the shader count. My gpu has 1280 shaders and I can't even set thread-concurrency=1280 ?
It gives me "Error -61: clCreateBuffer, , decrease TC or increase LG"
I'm on windows with the modifed cgminer 3.7.2
try to use setx GPU_MAX_ALLOC_PERCENT 200 (or even bigger number).
I use vertminer and directly execute the command above.
I don't use vertminer.conf to set the parameters, it makes a lot of troublesome. For example, setx GPU_MAX_ALLOC_PERCENT 100 can not be active if you use vertminer.conf, even if I separately execute setx GPU_MAX_ALLOC_PERCENT 100 before running vertminer.
But for my 280x system and 7850 system, I can use vertminer.conf.
Thanks, but GPU_MAX_ALLOC_PERCENT 200 didn't help.
I finally managed to double the rate by setting
GPU_MAX_ALLOC_PERCENT ""With that I'm getting 155 kh/s , WU: 144.2/m, no HW and hardly any rejects
conf is:
"scrypt" : true,
"gpu-engine" : "1100",
"gpu-memclock" : "1500",
"intensity" : "12",
"gpu-threads" : "1",
"shaders" : "1280",
"thread-concurrency" : "4096",
"lookup-gap" : "2",
"worksize" : "256",
I think there's still more possible, will be trying it without the conf file