I agree and am very disappointed with my Prisma.  I've been troubleshooting it for weeks and trying different methods to get it to run (windows, linux, usb, controller, etc...).  As of right now, 2 of the 4 boards give off nothing but errors, 1 of the boards is completely dead due to arriving with missing parts, and 1 works.  I can't get any response from asicminer and my group buy seller told me to deal with them and won't accept a return.  My advice, if you insist on buying one of these, make sure you do it with a method that can be charged back in the event you receive a non-functional miner and whoever sold it to you is unwilling to make it right.