Re: Very low hash rate with Radeon R9 270X OC 2GB WindForce

Quote from: lethysek on February 11, 2014, 11:44:09 PM

Quote from: Wipeout2097 on February 11, 2014, 03:25:04 AM

cgminer.exe --scrypt -o stratum+tcp://pool.com -u worker -p pass -I 18 -w 256 -g 1 --thread-concurrency 24000 --gpu-fan 85 --lookup-gap 2 --gpu-engine 1120 --gpu-memclock 1500 --gpu-powertune 20

330 kh/s on this conf

I think that it is not a problem of cgminer configuration, because I tried a lot of this and always hash rate is similar.

Problem is propably somewhere else, but the question is where? Embarrassed

The problem is actually known: VRAM latency. There's a thread for 280x: https://litecointalk.org/index.php?topic=12369.0

Unfortunately 270's don't seem to be prioritary...

Instead, if this is becoming frustrating, I suggest you mine a non-scrypt coin like: http://max.1gh.com/