I'm topping out at 11.30/m with that flash and this difficulty. This is across 17 units. Almost all are above 11.22/m
Thanks for the input... I'm trying to eke out whatever I can out of the singles with their current configuration. So far (after 17hrs) they are looking like this:
PGA ENABLED STATUS TEMPERATURE MHS AV MHS 5S ACCEPTED REJECTED UTILITY FIRMWARE
0 Y Alive 52.40°C 856.07 865.42 12,463 28 11.98/m 872
1 Y Alive 51.80°C 836.12 857.69 12,086 17 11.62/m 864
2 Y Alive 55.50°C 856.14 865.43 12,448 18 11.97/m 872
3 Y Alive 56.50°C 847.26 857.68 12,334 14 11.86/m 872
4 Y Alive 54.50°C 878.98 890.71 12,574 24 12.09/m 896
5 Y Alive 54.00°C 833.09 857.68 11,946 15 11.48/m 864
6 Y Alive 53.00°C 855.80 865.46 12,445 21 11.96/m 872
7 Y Alive 57.40°C 856.28 865.19 12,479 11 12.00/m 872
8 Y Alive 53.60°C 856.97 874.05 12,450 31 11.97/m 880
9 Y Alive 56.50°C 864.40 873.73 12,355 30 11.88/m 880
I've basically been waiting a day, then checking their utility. If it falls below 11.62, I've dropped it down a notch and tried again. Right now it's pretty good, haven't reflashed in a few days. Until I can figure out a sure-fire way of keeping them cool without having to run the a/c 24/7, I'm probably going to leave them as is.
My plan is to eventually take them out of their cases, re-thermal paste all of them (so far only three have been redone) and flip the top fans.
I should note that I have switched to P_Shep's cgminer (
https://bitcointalk.org/index.php?topic=88379.msg973745#msg973745), since it's optimized for FPGAs. I was running into issues where over the course of a day or so, they'd slowly start throttling themselves down. With P_Shep's update, this no longer occurs.