Post
Topic
Board Hardware
Re: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping)
by
ferncreekminer
on 12/11/2014, 18:47:11 UTC


[We did not participate in group buys, this is our own experience]

Hi, so, this has been a total nightmare.  But, I found this information posted by CrazyGuy to be reliable https://bitcointalk.org/index.php?topic=795477.0 and he points out flaws with the dip switches and notes on the "virtual boards".

Also, 3/16 of the prismas I've received had caps rattling around the boxes.  I have 5 of our own I've yet to open, 4 from a customer I've yet to inspect.  These all came straight from AM.  Also the Tube we received, I'm guessing as compensation, had components that had fallen off in the shipment.  This has been a total disaster. 


[/quote]

Question as to the packaging - are your units packed with the 4 blue tubes keeping the prisma in place or did they have 4 white squares shaped pieces of foam to keep the prismas from shifting?

I have 2 working units from CG GB on hand my batch1 unit had 4 white square pieces of foam & the prisma had shifted in shipment. the 2nd unit I got AM had changed to using blue foam tubes (a bit bigger) and the unit had not shifted during shipment.

Got another unit on the way from Canary's GB.

Luckily both of my units so far are working great since I have moved from the BE Controller to the Minera RPi image that CG created. When on the BE Controller it couldn't handle 8 hashboards - 1 board would cause the unit to stopping hashing after 1hr - 1.25 hrs.
Even on the RPi the unit seems to have issues if I use a pool port that is set for vardif - using a port set to difficulty 2048 works great though.

http://i.imgur.com/0RRLSU0.png