Crossfire HD7950 and HD7970

[petrudrg]

Hey guys. I really like Tom`s reviews so i think this is the right place to post my question
My current setup is:
3770k+H100i
AsRock Z77 Extreme4
16Gb Corsair Vengeance 1866Mhz
OCZ Vector 128Gb+WD Black 500Gb
Gigabyte HD7950 (900Mhz)
Corsair CX 750
CM 690 II Advanced

My question... Is the CX750 enough to add a Gigabyte HD7970(1000Mhz) to the system? I read that AMD Crossfire will use both cards at max spec. The other question is should i do this or should i buy just another HD7950?
Thanks and hope you understand my english

 

[vish93]

i will say buy another hd 7950, and if you buy a hd 7970 it will only run at hd 7950 speed, AMD recommends 750watts or greater power supply so you are just on the edge

 

[WillSK]

Just get another 7950. It'll work much better

 

[MrKambo]

crossfire is only as fast as the slowest component in the chain!

it would be a waste to xfire a 7970 with a 7950, you would be better off getting another 7950 and clocking them the same, also you'll save some pennies!

 

[alienware]

A friend of mine runs a 7950 with a 7970 and gets higher overall scores than running a pair of 7950s.

It's pretty much a waste of money buying a 7970 though as the 7950 will always be cheaper and will do what it can pretty much.

 

[petrudrg]

I guess nobody really tried this combination of GPU`s. What about the PSU? Will it handle the two graphic cards?

 

[alienware]

Personally I would worry about the CX. If it were a TX or HX I would have no reservations.