I have 6 R-box miners running on CGminer on a Windows 7 machine.  They seem to run ok but even running them at a clock speed of 290 I am getting only about 200Gh/s from the 6 of them or just about 34Gh/s each They do peak at about 208-210 Gh/s (still under 35Gh/s each)  but only brief peaks. 4 or 5 times a day I have to restart 2 3 or all 6 of the miners as they slow down to high teen to low twenties GH/s

I thought it was power related as I had all 6 running from one 360W PS to start with but I have since bought and hooked up a second 360W PS and put 3 units on each and still the same. I can not get speeds of anywhere near the 35 GH/s each I was expecting with any kind of consistency. I get nearly 35 for brief peaks but it drops off to average a bit under 34 and then drops off to less than 25 after a few hours. I have the 6 units set up spaced out with a 20" box fan blowing across them and they run about 39-40c so I don't think it is heat related either.


My question is, What am I doing wrong or is it just a design flaw that these units can not run for more than a few hours at a time reliably?


Is there an updated firmware or driver I should try? Any suggestions would be appreciated.