Post
Topic
Board Hardware
Re: Very unofficial review of the BitaxeGamma miner.
by
sidehack
on 30/10/2024, 03:10:25 UTC

Ahh the joys of mass production. You might never see it but 10% of your boards could.

Board deflection of only 1% will cause this, even a .5% settling error of the asic will cause it. Maybe too much paste on asic pad.

More of a problem for Muti asic boards though

We used a pretty high quality thermal pad on the R909 to help with contact and thermal expansion issues. Got along quite well.

Single chip, just gotta make sure the heatsink mounts flat to it and stays flat to it. Two-point with a tiny chip gives a lot of room for swing. Can't wait until we have the new heatsink samples in hand with four screws and a nice solid base for better lateral heat transfer away from the central hotspot.

Phil, sorry yours went out with an unlapped heatsink. It was one of the very first production units after the five samples I built to test thoroughly. We started sanding the heatsinks smooth a day or two after yours went out. Wish I'd thought of it sooner.