He'll give you lots of hugs.

Regarding lack of standoffs, I have found laying the boards down and using two on the bottom to connect them works well.  For me, most of the dinky

40mm fans where toast anyway so I removed them and use three 120mm fans per bank of 10 boards.  I reversed the cables and run them under

each board and the fans blow in from the cable side. This allowed me to use half the standoffs AND get better cooling.  They take up slighty more

space but I have plenty of that.  I will post a pic soon. Works really well actually.

Edit: Finally got the errors under control.  Seems more than four boards drops the SPI bus voltage too much.  Back fed this into the last board on pin 10 and no more errors!

I noticed that with 5 boards, the voltage was only 1.55 at the last one. some chips apparently don't like it this low and send out a lot of bad data even though they are hashing

with low errors.

Sunday. On this day the last big bet slips submitted last month will be decided.

Well, dozerz has been using the forum for hours and hasn't replied to PMs or paid for the coin yet.

So it's looking like he's welching on his obligation here.

dozerz: please prove me wrong.

ok I'll give that a shot.  So I can just pull the female connectors out of the molex plug and hook them up. 

I'm only trying to get a chain of six to work - i get 100% HW errors.  I tried chainminer - couldn't figure that out - so I installed cgminer using the kanos directions. 

It recognizes the boards - sometimes up to 93 chips - never all of them of course. 

I'm powering the Pi using a usb cable.  I am not powering the controller board as there is no way to do so - it has an odd 4 pin connector on it that looks close to a molex - but the molex from the power supply wouldn't fit into it.  Not to sound like a n00b but I'm stumped on that one.

Some one referenced overclocking the pi itself to 900mhz - is there a quick and easy way to do that?

I did use chainminer, briefly to compare against Cgminer.  I prefer Cgminer because I monitor it's API remotely.  I will try to post pics of my modifications

to the control board, when my second Raspberry Pi gets here.

Do these boards run slower in larger setups?  I have had a problem with boards running much slower when 15+ are connected to one controller.

I am using raspbian/Cgminer4.3.4.  I tested ALL of the boards individually and have 20 of them that do 40Gh+ by themselves.  This is 2.5Gh per

chip.  When they are chained 5 boards to a bank, some them only manage 1.0-1.2Gh.  The errors look good, rejects look good but speed is way

low.  They are cooled by 120MM fans running at full speed and 1500W of clean power(wired together by 14 gauge wire).  Seems that it is a bus

issue.  Maybe a CGminer issue?  I posted earlier some suggestions, these worked to cut errors/rejects but now speed issues.  I am starting to think

these boards are POSSESED!

Thanks for any advice/feedback.

I am not onsite where my boards are. Does anyone know the length of the brass bars included with these?  I guess about 20-24mm.

2x 220 uF tantalum.  Might need more though.  It is important to use low esr caps.  The caps aren't required, but do reduce the errors somewhat.

Example: http://www.mouser.com/ProductDetail/AVX/TPSC227M006R0125/?qs=nuh5PIvfcbyhUuXGL20cAA==