please help me correctly!!!!!!!!!

[alibakhshi1988]

hi every one
i want to change my cracking system
i want to buy hardware looks like list that is below:
mainboard with 4 or more way crossfire
4 vga card
and others to need
which brands and models are you offer to me
please explain your reason that why u offer this...
Beforehand i thank to all of yours
good luck

[epixoip]

do some homework and search the forums. this is a common topic that has been discussed at-length.

[alibakhshi1988]

do some homework and search the forums. this is a common topic that has been discussed at-length.

i do
but informations very uncoordinate
i'm confused especially in vga card models between 7990 and r9 290x

[KT819GM]

You want r9 290x.