Quote from: eros on July 17, 2013, 12:25:24 AM

Burning boards have ~320 parts and pnp machine handles ~22000cph. So ~70 boards per hour. He can handle over 10000pcs avalons in normal 8hrs workday. But broblem arise from postage. It takes lot of time to pack boards and post to many customers. If average order is ~200 avalons ~10boards it means 50 pack/post per day. And he is alone and have other work too. But if things gone well he handle all orders in week.

Burning test pcb bottom are full painted. Orginal avalons have solder square in every chip locations. I think solder is better heat conductor than paint. Maybe he corrected it production boards..?

You are correct about the pnp machine (i am up to 405 parts now btw).
But i am a professional, and as such I do what I can do best and outsource the rest!
Therefore i'll use a fulfillment service to do the packing and shipping.
I know that any delay will cost YOU, my customers real money and therefore getting your stuff to you ASAP is a priority for me.
Exposing the copper on the bottom will increase the thermal coupling but i want to keep the heat sinks isolated.
(Important for water cooling, electrical corrosion)

Shop Timing:
I agree that this is not the optimal strategy for things like this.
But with all in all 500 People ordering stuff things should not break instantly.
(did choose a beefy server)

And i have some numbers to go with those from yesterday:
Slightly different air cooling setup therefore different temperatures with air cooling. (fan placement)
TL;DL : 450Mhz [9Ghash/s] - STABLE
But at the cost of 94Watts of power.

Air:
431 - 54, 48, 1.30V, 87W, stable
450 - 56, 48, 1.30V, 90W, HW Errors
450 - 57, 52, 1.34V, 94W, slightly increased error rate compared to what i normally call "stable" but close enough

Water:
450 - 54, 32, 1.34V, 94W, slightly less hw errors then with air