Here's How I did it:
a) Buy Copper VGA RAM Heatsinks. Usually ships in sets of 8, so 2 packs per h-board.
a.1) I bought these: http://www.ebay.com/itm/161102078777?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
b) Affix each piece of VGA RAM Heatsink to the back of each BitFury chip on the H-Board. The RAM heatsinks come with thermal adhesives affixed.
c) Cut a 2 inch strip of DDR3 / DDR2 RAM heatskink for cooling the regulator area. Affix the heatsink to the back of board near the regulator with either thermally conductive glue or use some kind of thermal paste and small dabs of superglue / epoxy at the edges
d) Pencil mod the board until voltage reaches 0.8V. One of my boards is at 0.8V another at 0.84V. I would say 0.85V is the max after which either the regulator will shut down or the hash rate will drop dramatically.
e) Cool the boards with 120mm or bigger cooling fans.
f) Play around with best.cnf (I first changed of all the chip speeds to 54, and measured nonce rate after 10mins of hashing, then changed to 55 and again measured nonce rates. Compared the differences on a excel spreadsheet, and chose 54 or 55 depending on which produced higher hash rates for the chip.)
g) I Use only one pool for mining
h) renice the miner proxy process to -14 or lower
Code:
2100 root 6 -14 33196 18864 4064 R 81.0 3.8 36h27:30 python ./mining_proxy.py -o us3.eclipsemc.com -p 3333 -cu XXXXXXXXXXX -cp XXXX -gp 8332 -v
h.1) I use htop to do ith.1.1) sudo apt-get install htop
h.1.2) pi@bitfury / $ sudo htop
h.1.3) Press F7 repeatedly to reduce nice.
