Post
Topic
Board Group buys
Re: [OPEN] Prisma 1.4Th/s group buy @ 1.42 btc with coupon
by
sdjernes
on 12/11/2014, 21:44:43 UTC
Hi All,

First Thank You Canary for doing the group buy!

Has anyone noticed that running these on the USB Controller is highly unstable?  

I have two of my three units so far and both are highly unstable.  I can not get them to keep up at anywhere near 1.4Ths.  I can get them to run, but they drift all over the place from 600Ghs to an occasional burst at 1.5Ths.  

I have tried running them on the RPi and the CubieTruck.  I have used the stock 4.7.0 CGminer, Fixed Debian Build of 4.7.0-1 CGminer, and the BlockErupter 4.6.1 build of CGminer from GitHub.  None have fixed or even made improvements.  I have tried both the standard (no --bet-clk option) and --bet-clk=23 timing.  

One thing I have noticed is that there is a lot of extended output in the BlockErupter Controller, that shows the chip status.  Can we get that status from CGminer somehow?