Re: SkepsiDyne Integrated Node - The Bitcoin Mining Company
Thats a good question. 
You need to keep 2 physical machines to attach the fpga boards too. However I assume you are correct in saying that it doesn't make sense to keep the graphics cards in there. Weirdly FPGA.contract do have GPUS on the go (http://contract.fpgamining.com/?page_id=34).
Oh, and in another rectification, accordding to the wiki (https://en.bitcoin.it/wiki/Mining_hardware_comparison) a real life quad 5850 machines pulls 700 wats but only generates about 1360 MHashes.
You need to keep 2 physical machines to attach the fpga boards too. However I assume you are correct in saying that it doesn't make sense to keep the graphics cards in there. Weirdly FPGA.contract do have GPUS on the go (http://contract.fpgamining.com/?page_id=34).
Oh, and in another rectification, accordding to the wiki (https://en.bitcoin.it/wiki/Mining_hardware_comparison) a real life quad 5850 machines pulls 700 wats but only generates about 1360 MHashes.
You can attach up to 127 FPGA boards to a single host PC and that is only a limitation due to USB root hub. It likely is possible to use more than that if you have 2 USB root hubs but likely isn't worth the effort as the top board is 360MH per board. 127 would net you ~40.5GH/s off any motherboard (and a lot of USB hubs
).