I'm trying to test Litecoin mining using a SAPPHIRE 7950 3GB, but I'm getting no more than 410 kh/s instead of expected 600 kh/s
gpu and mem speeds can go higher but don't increase hashrate
I've tried --shaders 1792, nothing spectacular happened.
OS is win7 64bit, 8GB RAM, CPU [email protected], GPU temp around 63 Celcius
Here's the batch I run:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer -o http://POOL:PORT -u USER -p PASS --scrypt --intensity 15 -g 1 -w 256 --thread-concurrency 8192 --gpu-engine 1000 --gpu-memclock 1350
Any suggestions? Can you post your working settings and speeds?
Thanks!
Update 1
NEW WORKING SETTINGS, still at 400 Kh/s
--scrypt --intensity 18 -g 1 -w 256 --thread-concurrency 21712 --gpu-engine 1100 --gpu-memclock 1600 --gpu-powertune 20 --lookup-gap 2
Update 2 (see below)
Better settings for me so far giving 575 kh/s
--scrypt --intensity 13 -g 2 -w 256 --gpu-engine 1095 --gpu-memclock 1475 --gpu-powertune 20 --lookup-gap 2