Crossfire different ATI cards

Avi Assayag

Distinguished
Sep 10, 2014
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Qudos to all of you pro's here :)I need a straight (and ok, yes - a well explained) answer to this:can I crossfire an ATI Radeon HD7990 (which I own) with an ATI R9 280X (that I'm planning to buy)???

And... what Kind of a PSU will it presumably require (I have currently a 750 Watt 80+ one installed)??

My MOBO is ASUS Sabertooth 990 REV 2.0
CPU model is AMD FX8350

THANK YOU GUYS SOOO MUCH!
 

Pr3di

Honorable
You can check this for some more informations related to your request:
http://www.techpowerup.com/forums/threads/crossfire-radeon-hd7990-r9-280x-toxic.202904/

I don`t think your PSU will suffice, since the 7990 is already a "two card in one".