the crossfire and pcie issue plz help

kais67847805

Honorable
Dec 15, 2013
3
0
10,510
hi everyone
i wanna buy a mobo "msi b75a g41 atx" and plug a GC Radeon R9 270X , i wanna know if i add in the future another 270x the crossfire will able to work with 100% efficiency or not ?? PS: the mobo has a PCIE 3.0 x16 and a PCIE 2.0 X16 PLZZZ help plzzzz