7950's only @ 575 Kh/s | Bitcointalksearch.org

I have x2 7950's and x2 290x's

the 7950's were defaulted by cgminer to a worksize of 64, if i try increasing this number to 256 the machine locks up.

Is there any other settings i can try to change to squeeze more out of the 7950's?

Code:

{
"pools" : [
{
"url" : "stratum+tcp://middlecoin.com:3333",
"user" : "xxxxxxxxxxx",
"pass" : "x"
}
]
,
"intensity" : "20,20,20,20",
"vectors" : "1,1,1,1",
"worksize" : "256,64,64,256",
"kernel" : "phatk,poclbm,poclbm,phatk",
"lookup-gap" : "2,1,1,2",
"thread-concurrency" : "24000,24768,24768,24000",
"shaders" : "0,0,0,0",
"gpu-engine" : "1000,1200,1200,1000",
"gpu-fan" : "0-85,0-85,0-85,0-85",
"gpu-memclock" : "1400,1250,1250,1400",
"gpu-memdiff" : "0,0,0,0",
"gpu-powertune" : "20,20,20,20",
"gpu-vddc" : "0.000,0.000,0.000,0.000",
"temp-cutoff" : "100,100,100,100",
"temp-overheat" : "95,95,95,95",
"temp-target" : "90,90,90,90",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

Topic: 7950's only @ 575 Kh/s (Read 393 times)