Can I crossfire a standard r9 290 card and a r9 290x tri-x OC card?

[Cenk Brightblade]

Can I crossfire a standard r9 290 card and a 49 290x tri-x OC card?

Here are my specs;

Motherboard
Processor
Power Supply

Is this enough for crossfiring those two?

My card

290x Tri-x OC

 

[rolandzhang3]

Sorry accidentally clicked no, they should work together just fine, though they'd be operating at the speed of the weaker card (though the 290 itself is beastly anyway so you might as well save some money by going with another 290)

 

[Cenk Brightblade]

So if I still buy the tri-x oc version will I get double the power of a standard 290?

 

[rolandzhang3]

Not necessarily, you won't get exactly double the performance in a multi GPU setup, most of the time it should be between 70-80% gains from what I recall