i5 4570 haswell | R9 280x Crossfire

[Ktrl]

Two R9 280x and one i5 4570 on a MSI B85-G43 GAMING, is a good idea?

which specific power supply do i need ?

P.S: sorry for my English

 

[clutchc]

Not a good idea with that MB. The 2nd PCIe x16 slot is only X4 lanes. http://www.newegg.com/Product/Product.aspx?gclid=CO-jtP2Cub4CFahaMgodAGcAkw&Item=N82E16813130726&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Intel+Motherboards-_-N82E16813130726&ef_id=U3p1iwAABHUpvh1F:20140519222135:s