It's an avalon Chinese copy, 55nm

1100W PSU

http://translate.google.co.uk/translate?hl=en&sl=zh-CN&u=http://detail.zol.com.cn/power/index367491.shtml&prev=/search%3Fq%3DGX1100m%26client%3Dfirefox-a%26hs%3DtOS%26rls%3Dorg.mozilla:en-US:official%26channel%3Dfflb%26biw%3D1280%26bih%3D920

As for the hardware issue Tom_o pointed me in the right direction already...

"1) Fuses blown on those modules (upper left of each submodule on the blade PCB, usually marked "FUSE1" or two fuses right next to each other with a "P" on them - see the btmine thread in Group Buy).
2)  Bad connection on the pits from the blade board atop the blade connecting to the 4 PCBs of 2 worker modules each (the pins could be bent or misaligned).
3)  Power supply marginal, such that only certain modules are getting enough current.

You can check 1) with a voltmeter (some resistance across fuse means it is blown, near-zero resistance means the fuse is fine)
You can check 2) via visual inspection
You can check 3) but putting in a known-to-be-beefier power supply and seeing how it goes

Personally, I'd go with #1, but that's only because that's what I experienced with my own Avalon clone.

Hope this helps!   And good luck!"

I've checked the thread and btmine had posted a picture of the fuse location so thats where I'm going to start...

http://www.imagebam.com/image/f71c0d303222836

Ineterested to know if anyone else has managed to fix the possible fuse issue? especially where to get the fuses from.

I'm useless with a soldering iron, tempted just to live with it.