Need advice for a crossfire

Tudorel Luca

Reputable
May 2, 2015
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4,510
Hi guys, first of all I'd like to let you know that I'm not that good with this kind of stuff, I do know some things, but not enough to make a decision.

So, this is my rig :
AMD FX 9590 Black Edition 8 Core OEM Processor 5GHz - H80 Cooled

Gigabyte GA-970A-UD3P AMD Socket AM3+ Motherboard
Corsair Memory 16GB DDR3 PC3-12800 (1600MHz)
XFX HD 7990 AMD Radeon Graphics Card 6GB
Aerocool X-Predator X3 Avenger Edition Red Large Tower Case
Aerocool Templarius Imperator 1150W PSU 80+ GOLD
Seagate ST2000DX001 2TB Desktop SSHD Hybrid 3.5" SSD 7200rpm

My questions are : What changes do i have to do to my pc to put another 7990 on it ?
Can i put as the 2nd card a r9 290x?

My budget is limited, so i would prefer to not make any changes if it's possible.

Thank you very much in advance ! :D