Crossfire Compatibility

[LXIX]

I have'nt been around for a while but I have a quick question before i buy my second video card.

I have a Radeon x1950 Pro with 256mb gddr3

Can i crossfire this card with a Radeon x1950 Pro with 512mb gddr3?
Or do i need the same exact card specs as the first one.
(Both are From Sapphire)

 

[Tmagic650]

This may help:
http://ati.amd.com/technology/crossfire/faq.html