Been running 10.6....has been rock solid. bit the bullet and moved to 11.5 and hash improvements 3.5 mhs per rig...(better than nothing)..

rig 1 x6 580s
rig 2 x6 580s

i forgot to add -oldkernal 1 initially and got a stack of memory errors...and the errors dramatically reduced when -oldkernal 1 was added and hash rate stayed the same.

just notices some instability with the hash rates..jumps to and from 173-181 a fair bit....

my current config:

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
EthDcrMiner64.exe -epool eth-asia1.nanopool.org:9999 -ewal xxx.rig1/xxx -epsw x -mode 1 -ftime 10 -oldkernels 1

any help would be fantastic.

thanks.
 

cheers