Quote from: chriscross on March 02, 2014, 11:59:29 AM

Quote from: JBT on March 02, 2014, 10:10:34 AM

Quote from: kabopar on March 02, 2014, 04:27:46 AM

Quote from: chriscross on March 01, 2014, 08:17:03 PM

Quote from: JBT on March 01, 2014, 12:30:00 PM

did a few test and anything with :950 produces asic timeouts
53:2:750   14.4Gh/s
53:2:850   20.25Gh/s HE 1.2%
52:2:850   20.3   HE 1.13%
53:2:750   13.44Gh/s
54:2:850   20.39Gh/s   HE3.9%
55:2:850   13.07Gh/s   HE35%
50:2:950   asic timeout
49:2:950   asic timeout

40:1:850 19.5Gh/s 1.5% 30°C
50:2:950 19.5Gh/s 1.5% 34°C
52:2:950 asic timeout
i also tried your best result
54:2:850 20.0Gh/s 4% 30°C

it would seem that my miner is hardwired to work best at 19.5Gh/s

At 53:2:950 I rarely get some asic timeout messages that eventually disappear. It runs at about 22.5 GH/sec (reported temp 29-30C). It has been running like this for long periods of time (cgminer 3.10 on Win7/64).

Cheers

yeah kabopar i used to run at 53:2:950 24Gh/s HE0.3% 32C ambient 35C , now it refuses to running on anything with :950
now best
53:2:850 19.94Gh/s HE0.88% 24.2C abient27C this one seems the best less Gh but also less HE

54:2:850 20.39Gh/s HE4.4% 25.5C ambient27C

Switched from cgminer3.9 to 3.10 and managed to overclock to 52:2:950 with much less hardware errors and no asic timeouts. Now it averages at 21.5gh/s. Temp is about 36°C.
At 53:2:950 the hardware errors are way over 20%...

My HW error rate at 53:2:950 is less than 3%. The reported temp is 28C now, getting to about 30C at times, with 3 fans blowing at this single board from 3 directions. Maybe you need some better cooling.

Cheers