Can you crossfire same cards from different manufacturers?

Yep! They will work, although I'd make sure to set them both to the same clock settings once installed if they are different by default. I do not know whether non-reference models work well with reference models, but in theory it should all be the same thing.
As long as all of the specs are the same, like have the same memory as well as clock speed. They don't necessarily have to be of the same manufacturer, yet they should be identical in specification.

For example (using a 6950)

6950 2GB + 6950 1GB = won't work

Sapphire Radeon 6950 2GB + HIS Radeon 6950 2GB = will work (in theory)
Actually you can put cards with different VRAM together (6950 1gb and 2gb cards, 5870 1gb and 2gb, etc). The only thing is that you'll only have the smallest VRAM amount available, so 1gb. In CF and SLI, VRAM is not additive. Both cards will carry the same amount of VRAM with the same info, it's like a redundant array (RAID 1 HDDs for example).


Nov 12, 2011
I'm getting a lot of conflicting information on exactly what you can do with Crossfire. Mostly that you need your cards to be in the same range for them to work and I wanted a clarification before I made my purchase.

Currently I have a 5770, can I jump to a 6950 and Crossfire?? Should I just scrap my 5770 altogether and get a 6950 or should I crossfire two 5770?

Thanks for looking.


Jul 6, 2011

It just have to comply with this