i am mining with r9 270X and r7 240
my config bat
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
SET GPU_SINGLE_ALLOC_PERCENT=100
sgminer.exe -k X11Evo -o stratum+tcp://pool.revolvercoin.org:3077 -u address -p x -I 13
First off do -w 64 on your r270x you've should hit 1.4mh
Also 280x and 290 do same hashrate,im pretty much desperate now I've try everything...
So here my setting for 280x,290,270x in order,if someone can make better hashrate feel free to share
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
sgminer.exe -k X11Evo -o stratum+tcp://pool.revolvercoin.org:3077 -u -p x -g 2,2,2 -w 64,64,64 --thread-concurrency 8196,8000,20000 -I 15,15,15
2MH - 2.4MH - 1.4 MH
Problem seeing, GPU is use at maximum 60% of his capacity.
Dev have good miner and us the shitter?
Here's another problem;
Whats a joke... My miner use 50% of my pc capacity and share work for 20 second. Good for garbage this miner. between this I believe dev mine with good coded miner and got all block
Not launch day,lunch day.
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Is everything ok now ? 
