Leadtek Extreme Edition GeForce 7800GT

[ghost]

Hi ppl my m8 has a Leadtek Extreme Edition GeForce 7800GT 256MB GDDR3 VIVO TV-Out/Dual DVI (PCI-Express),
Just wondering if he could buy a normal Leadtek GeForce 7800GT 256MB GDDR3 VIVO TV-Out/Dual DVI (PCI-Express)

and run them in SLi ??
If so do i need to change anything or just put the card in and enable it in the BIOS ?

cheers

 

[holyjunk]

i think they have to be the exact same card but get some more opinions first