I think the title explains it all. Thanks in advance for the help.
ive also wondered this...also if it matters if one is 2gb and one is 4gb..yes probably a noob question
I'm pretty sure NVIDA needs two exact same cards/Company.
But AMD from what I remember you can CF a 7850 with a 7870 or 7950 with a 7970 but will run at the lower cards speed. Also doesn't need the same company.