Five rigs are ~$950/.90 Ghash/sec
Two rigs are ~$1050/.85 Ghash/sec
Two rigs are ~$1300/.95 Ghash/sec
There are a lot of IRL companies that keep trade secrets from their shareholders.
Yeah, no wonder he wants to call it a "trade secret". He'd catch a lot of flack for building inefficient miners. There's nothing special about those builds. There are hundreds of people on this forum that could build better systems.
thanks why id like to know what the builds are. If he told us we would be able to tell him how to make it more efficient it is. Or if he took our suggestions. a base rig is pretty much the same getting the cards is the hard part.
sempron140
1000w-1200w psu (1200w isnt over kill some cards take a lot more power or he might put a dual core and 3x single core cards then 1200W would support it)
2gb usb stick
1gb RAM
mobo personally i like the MSI 890FX-GD70
then rest is just cards and how cheap you can get them.