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6870 CF in x16 x4 lanes

post #1 of 8
Thread Starter 
A buddy of mine got a pair of nice 6870's yesterday, & bought a board today.

He returned a Gigabyte 990fx UD-3 to Microcenter since it was faulty (It was) and since he wanted to get some other things (like a mouse) he spent less on a board the 2nd time around.

He bought a ASUS M5A97 EVO AM3+ which is x16 x4 for the PCI-E lanes.

I'm just curious if anyone knows accurately what type of performance hit this is going to take on 6870's specifically, vs x8 x8 CF & in general.

Gigabyte 6870 & Sapphire 6870 are the exact cards.

Thanks.
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post #2 of 8
Shouldn't be more than 5%.
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post #3 of 8
Not crossfire compatible
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post #4 of 8
I'm pretty sure it's CrossFireX compatible - on newegg it says it's Quad-GPU CrossFireX compatible.
 
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post #5 of 8
Quote:
Originally Posted by TheRockMonsi View Post
I'm pretty sure it's CrossFireX compatible - on newegg it says it's Quad-GPU CrossFireX compatible.
The M5A97? It isn't Crossfire compatible, no motherboard is CF compatible unless it has at least 2 x8 slots, and it doesn't say anywhere on the site or Newegg that it is Crossfire compatible.

I think you mean Quad USB.
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post #6 of 8
Quote:
Originally Posted by Zackcy View Post
The M5A97? It isn't Crossfire compatible, no motherboard is CF compatible unless it has at least 2 x8 slots, and it doesn't say anywhere on the site or Newegg that it is Crossfire compatible.

I think you mean Quad USB.
No, any motherboard with 2xPCI-E lanes is crossfire compatible.
    
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by Anthraxinsoup View Post
No, any motherboard with 2xPCI-E lanes is crossfire compatible.
That's what I thought. Zackcy HAS to be wrong, right?

It has to work, It's just the performance hit I'm curious about
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post #8 of 8
You won't really notice the hit. You'll be fine.
   
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