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Mixing 5870 brands for CrossFire

Not a problem as such but if u have one with an unlocked BIOS and the other without, you wont be able to clock the one without as high as the one with.
 
Haven't even looked at BIOS on my Sapphire 5870 etc.

Can you crossfire lower spec models i.e. 5850? I would assume the 5870 would downgrade to 5850 levels?
 
What resolution are you running at? Anything below 1920x1200 with modern games on max settings will be utterly destroyed by a single 5870, at least as far as I know :)
 
neo-omega said:
Right on the money there, in hybrid crossfire the faster card is slowed to match the slower one.
Click to expand...

Core speeds aren't adjusted, the only thing that is is memory usage. If one card has 2GB of RAM and the other has 1GB, both cards will only be able to use 1GB each.
 
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Call of Pripyat should have even higher requirements me thinks? It's a relevant comparison if the engine used is the same.

@Mikey

Overclocked 5850s in CF will perform the same as 5870CF.
 
Mr Krugga said:
Call of Pripyat should have even higher requirements me thinks? It's a relevant comparison if the engine used is the same.

@Mikey

Overclocked 5850s in CF will perform the same as 5870CF.
Click to expand...

So get one 5850 and overclock it and cf it?
 
Mikey said:
So get one 5850 and overclock it and cf it?
Click to expand...

Actually it's as simple as get two 5850s, Crossfire them, overclock both with voltage set to 1.15V (stock 5870) and clocks to 850/1200. Check stability and temps to be on the safe side. Usually you can squeeze some 50MHz more at this voltage anyway. Performance difference will be within 5% margin of favouring 5870 clock for clock.
 
Mr Krugga said:
Actually it's as simple as get two 5850s, Crossfire them, overclock both with voltage set to 1.15V (stock 5870) and clocks to 850/1200. Check stability and temps to be on the safe side. Usually you can squeeze some 50MHz more at this voltage anyway. Performance difference will be within 5% margin of favouring 5870 clock for clock.
Click to expand...

I already have one Sapphire 5870 card
 
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