Wrong section but....you only need a dual core CPU,4gigs RAM,80gig hdd or bigger(if you keep wallets on it) & AMD 470/480 4gig/8gig or 570/580 4gig/8gig vid cards.....

Brand name powersupply is a must.....

You can get Nvidia cards but they cost more..........

You can get mobo with 1 or 2 16x PCIE slots & most come with 2-4 1x PCIE slots,so you get 4-6 cards on em.

You will need risers for the 1x PCIE slots,I recommend this one:

http://www.ebay.com/itm/332076189157?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

https://forum.ethereum.org/categories/mining/p1

I mine eth for now & will pick another altcoin when goes POS or becomes unprofitable.