Quote from: bitcointaco on December 25, 2013, 01:53:17 PM

Your thread concurrency is way too low. Try 25984.

Here is the cgminer.conf which gets all 3 of my 7950s up to 655kh all day long:

{
"pools" : [
{
"url" : "stratum+tcp://pool.pool.url:3333",
"user" : "user",
"pass" : "password"
},
{
"url" : "stratum+tcp://pool.pool.url:3333",
"user" : "user",
"pass" : "password"
}
]
,
"intensity" : "18,18,18",
"vectors" : "1,1,1",
"worksize" : "256,256,256",
"kernel" : "scrypt,scrypt,scrypt",
"lookup-gap" : "0,0,0",
"thread-concurrency" : "25984,25984,25984",
"shaders" : "0,0,0",
"gpu-engine" : "0-0,0-0,0-0",
"gpu-fan" : "0-85,0-85,0-85",
"gpu-memclock" : "0,0,0",
"gpu-memdiff" : "0,0,0",
"gpu-powertune" : "0,0,0",
"gpu-vddc" : "0.000,0.000,0.000",
"temp-cutoff" : "95,95,95",
"temp-overheat" : "85,85,85",
"temp-target" : "75,75,75",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

There is some problem:
- I can't set intensity greater than 13. With 13 i haven't any hw error, with 14 or more, i have too much hw error.

- I can't set thread concurrency greater than 8192. If i use greater value i have this error--->
maximum buffer memory device 0 supports says 536870912
your script setting come to 939524096
error -61 etc
failed to init GPU thread 0 disagling device 0

one question: that overclock need an overvolt too?