I feel the with you i can not get these boards to run faster
So i might be lucky i never saw them hash before the repair, i might have broken some walls out of frustration if i did.
But nevertheless i see people posting speeds these boards never will make, when i connected 1 board direct on my pc it ran at 950 but guess what it did the same speed as it did at 48:2:850 so exact same speed only higher voltage
But again when i took another board and put it onto the same usb mainboard connector they began to asic unresponssive blah blah again
I have just one board, which was modified to use the linear regulator by Drillbit in Sydney. It has been running now for 'ages', like many weeks without any hiccups at an average hash rate of 22.5 GH/sec. It runs at int:53:2:950 using cgminer 3.10.
The estimated BTC that it has generated is 0.65, and cost about 0.625 BTC, so ROI has been achieved in BTC, disregarding the recent upheavals in BTC value, but it still has some time to go.
Cheers