I am using CPUminer (GC3355 fork) with this command line:
--gc3355-detect --freq=800 --gc3355-chips=400
Avg in Minera shows 26.66Mh/s. Pool shows 26,815 Kh/s, so I think it is accurate. I also have the miner restart every 24 hours as I do see a drop in speed over time. This seems to help keep the speed consistent.
I do run the Gridseed 5 chip units at 850, but that speed gave me less Mh/s on the G-Black.
In case anyone is interested, I have also modded my G-Black by replacing the three 80mm x 38mm fans with two 120mm x 38mm fans. Runs just as cool with a much more tolerable noise level.
- fvineyard
Can you post what replacement fans you used, the three on mine now are very load i want to replace them but not use what with .
NM no need i got two of these
http://www.amazon.com/gp/product/B00FKNAG7Y?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00 running inside it now they are load as hell but not as bad as the three it had those two fans seem to cool it better just to loud but not as load as the stock fans , I think I found two other fans at a DB level at like 42 to 45 at full speed and found a way to add power PWM fans to it that Actually work with PWM like the S 1 s3 s5 etc .