New here and need help with Hardware config

[Eurodancer]

Hi!

I have two 7950 cards. Each of them mining LTC at two different PCs.

I want to make a rig from them & +1 7950 in the future. Three 7950 in total, what my MB best choise?

Asrock B75 PRO3 + G1620
GIGABYTE GA-B75-D3V + G1620
Gigabyte GA-P75-D3 + G1620
MSI B75A-G43 + G1620

MSI 970A-G43 + AMD Athlon II X2 280
Asus M5A97 LE R2.0 + AMD Athlon II X2 280
Gigabyte GA-970A-DS3P + AMD Athlon II X2 280
MSI 970A-G46 + AMD Athlon II X2 280

ASRock FM2A75 PRO4+ + AMD Athlon II X2 340
ASUS F2A55-M LE + AMD Athlon II X2 340
MSI FM2-A55-G43 + AMD Athlon II X2 340

I want to place 2x7950 to the 2 PCI-E x16 slots on the MB and 1x7950 to the PCI-E x1 with raiser (without power mod). Wich MB can support 3x7950 without damage itself by high power needed?