5750 and 6770 CrossfireX

[Richard]

I'm planning on buying one of the "new" range of cards from AMD, and I've been looking at the 6770. I had considered buying a higher end card, but it seemed far more cost effective to buy a 6770 to pair with my 5750, than something like a 6850.

Has anyone here got any experience with CrossfireX? Would I need to connect all monitors to the same card to create the eyefinity extended display (requiring an adapter), or can the plug in the secondary card (which would be the 5750)? I also have a feeling I'd need to flash bios, which I'm a bit worried about, so that would be nice to have help with.

Thanks.

[Frement]

The cards must be identical.

[Richard]

The cards must be identical.

Not true, they must just use the same architecture:

http://www.club-3d.com/tl_files/club3d/uploads/en/content/Technology/AMD/CrossFireX/AMD_CrossfireX_Chart_1618W.jpg

[Frement]

Ok, well I got that wrong then :o If you disable CrossFireX you can connect your displays to both cards, but with CrossFireX enabled, you can only connect to one card. Also I didn't flash the BIOS. I have 2x HD 5850.

[Richard]

Ok, well I got that wrong then :o If you disable CrossFireX you can connect your displays to both cards, but with CrossFireX enabled, you can only connect to one card. Also I didn't flash the BIOS. I have 2x HD 5850.

Okay, so I'll have to buy an active DP connector. My motherboard is almost a year old now though, and the new AMD series cards are quite new, so I might have to flash it. I'll probably buy the card first, then see if it needs flashing.

[Capricorn]

I recommend selling one GPU and just buying a higher tier, multi-gpu setups are a pain.

Crossfire doesn't always work that great depending on the game, and stuff like microstuttering happens.