Do graphics card have to be same aftermarket brand for SLI?

[theblackshane]

I have an HIS Radeon HD 6850 graphics card. If i want to go SLI do I haft to get that exact version of the 6850 or can I get XFX or GIGABYTE 6850 model? Same graphics card; different aftermarket brand.

 

[clutchc]

Brands don't matter.
http://www.tomshardware.com/forum/245454-33-crossfire-faqs

 

[theblackshane]

Brands don't matter.
http://www.tomshardware.com/forum/245454-33-crossfire-faqs

I was asking because some of them have different clock speeds than other. That doesn't matter?

 

[jerreece]

If the two cards are not the same clock speed the one with the slowest speed will win out. Both will run at that lower speed.

They just have to be the same chipset (i.e. GTX 460 won't work with GTX 470).

 

[Rhavi Marques]

but since the lower clock wins out, 2 of the same cards look better in the rig in my opinion