power color hd7970 and hd7990 and R7 apu

[foxmartin23]

i have a gigabite hd7990 6gb and also a powercolor hd7970 3gb also a r7 chip apu . would it be st to build two pcs or one out this ,i have two mainboards and also a athlon quad core ,as two pcs but seen people triple crossfire .would i need a 1000watt psu possible ?

 

[legend001523]

You can't crossfire both cards so 2 different [c's would be better maybe

 

[foxmartin23]

i seen results here http://www.tweaktown.com/articles/5414/amd-radeon-hd-7990-6gb-and-hd-7970-ghz-edition-video-cards-in-crossfirex/index3.html a 7990 is two 7970 cards in 1

 

[legend001523]

^ Hm, so I was wrong, I'd get a crossfire then, should get better performance than two mid tier cards on seperate rigs