15 7950s, which can fit on 3-5 rigs (depending on how you plan to set them up), are only $4500. The rigs are $300 each (on the high end). It's not that big of an investment to get 10000kh/s. Even if you go three cards per rig and get nicer parts, your investment is only $6000. Maybe another $40 for risers.
Yep, made the calculation after looking at some hardware and you're actually right! What do people normally use raisers for, to space out the cards?also, you can use raisers to plug the GPU into a PCI-X 1x port. Mining does not require the bandwidth needed by playing video games, so 1x provides more than enough to give the GPU work to do.
but yes, it allows you to seperate the motherboard from the gpu's, giving you far more space and much better cooling.
Thank you.
