I get 900~ khs and 900~ wu for a solid 10 minutes (average) then i get a sharp decline (drop to 750 wu and khs always stays around 865khs), then it get slow decline by about 1 average WU per minute and then hash rate and then drivers crash, cgwatcher eventually restart the miner after that. For a while, i get alot of artefacts and black lines. Restarting or leave the gpu alone for a while clear that up. I dont get artefacts when i game at 1250 memclock nor 1300.
According to the logs, the process happens faster and faster until drivers insta crash like so :
[2014-03-12 12:02:32] Total hashrate is below Scrypt cutoff 700 Kh/s (0 Kh/s); but am inside the miner's startup grace period (Elapsed:36 sec;GracePeriod:3 min) so did not attempt to restart yet, but I will if the condition exists after the grace period expires.
[2014-03-12 12:04:02] SGMiner process closed outside of CGWatcher!
[2014-03-12 12:04:02] The miner is closed outside of CGWatcher and you've requested for me to ensure it stays running. Attempting to start...
[2014-03-12 12:04:16] SGMiner started successfully.
[2014-03-12 12:04:36] Total hashrate is below Scrypt cutoff 700 Kh/s (0 Kh/s); but am inside the miner's startup grace period (Elapsed:26 sec;GracePeriod:3 min) so did not attempt to restart yet, but I will if the condition exists after the grace period expires.
[2014-03-12 12:06:16] SGMiner process closed outside of CGWatcher!
[2014-03-12 12:06:16] The miner is closed outside of CGWatcher and you've requested for me to ensure it stays running. Attempting to start...
I find it odd that it says the process was closed outside CGWatcher. But whatever, there it is.
So since i have CGwatcher now restart my miner after hashing drop too much. (As you can see at 700, but on the previous logs, by the time the grace period is over, its already down to 500s khs.
So in a nutshell. First critical drop occured after 40 minutes, then after 20, then 10 (its honestly that clean), then 10, 10, 10, 10, 20 (it did go back up), then it goes bad, 3 (was at 690 khs and 3 is minimum grace period), then 3 again (khs was at 300), then insta crash and restart every 3 minutes for about half an hour, then i wake up and stop this madness.
Here's my dxdiag
http://pastebin.com/XM5HW22HThis is my config:
"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"failover-only" : true,
"gpu-threads" : "1",
"gpu-memclock" : "1250",
"gpu-powertune" : "20",
"temp-target" : "85",
"temp-overheat" : "90",
"temp-cutoff" : "95",
"vectors" : "4", (that and -w together is the only way to get khs and wu to a reasonable amount)
"lookup-gap" : "2",
"thread-concurrency" : "25601"
And these are the only 2 .bat arguments used --xintensity 512 -w 128 (its the -w 128 that yield high khs + high WU/kh ratio).
I use SGminer 4.1.0
I already spent days trying different things and settings and next step is changing a setting and not touch the computer for an hour to see if its more stable but i'd like to be stopped right here if there is an obvious issue, as there are prolly weeks worth of combinations to try still.