Help with SLI?

[MatthewC1991]

Firstly i currently have Asus GTX 670 Direct CU II 2GB GDDR5, can i buy an EVGA FTW or do i need same card.

Next how do i set it all up? is it easy?
As in do i need HDMIs for Both Cards etc

 

[MatthewC1991]

i have a z68 Motherboard and ok thanks il get the EVFA FTW then as its cheaper and thats all i meant, will i get the SLI bridge with the GPU or do i need to buy one?