Quote from: Xian01 on November 09, 2013, 04:49:36 AM

Quote from: ionstorm on November 09, 2013, 04:45:54 AM

anyone experiencing fluctuating hash rates with these F16's? Not sure what could be the issue but im mining on Eligius and my 7 miners are fluctuating from 33-45Gh/s, I'd like to keep them more stable at a hash rate of 40-45. Could it be a power or cooling issue, do they run more stable at lower hash rates? Or could updating firmware fix this?

These guys are very temperature sensitive, and CGMiner triggers a thermal shutdown at 53.5C and restarts at 45C.

What temps are you running at ? I suspect you're cycling, which might explain the fluctuation.

FWIW: I've had mine running solid for a few days now and they've settled quite nicely. One box fan blowing down on two wire racks housing these guys, with another floor fan blowing across them to keep 'em ventilated.

http://i.imgur.com/VkoyEdS.png

Xian, I happen to have 18 myself. What is your solution for powering them? I didn't plan ahead for my shipment all that well, so I currently have 12 attached to a standalone 1000W ATX PSU; the other 6 are leeching off of a different PC's spare PCI-E cables (in a different room altogether). I'd like to consolidate them if I can.

For others, I did find my Klondikes occasionally entering cgminer's overheat/recover loop and costing precious hashrate. So I spaced them apart more in my rig and introduced some external fans as others have done. This has helped. Anybody been OC'ing with cgminer recompiled for a higher temp threshold with good results to report? That is probably my next step.