7950 crossfire ?

[semperflave]

Hello guy's

here are my questions : 

i already have a sapphire hd 7950 and i want to buy another one for a crossfire .

i have found HD 7950 but only oc modele or with " boost"  are they any compatibilite issues with those ones and my hd 7950 stock edition ?

i have a 650 Watt psu 80+ bronze from corsaire i'am not sur if i have to upgrade thios one too ?

Thank you 

[JORDANonPC]

you need a better psu if you want to overclock and be on the safe side something that is 750w would be perfect also I don't think there will be any compatibility issues but it's best to get the exact same model as card as you already have 

[Villain]

You will be fine. I have a Corsair 650w 80+ Bronze and have crossfire 7950's that are overclocked to 900mhz on the core, as well as an i5-3570k overclocked to 4.0ghz and haven't had any issues. There will not be any compatibility issues, and there is no issue with having separate models. 

[M-ursu]

Everything will work, but i would wait for maxwell.

[semperflave]

ok guy's thanks

i also have a sound card (asus xonar essence stx ),  4 hdd , 2ssd and an i5 3570K .

and i'am going with the drop price of the hd 79XX