Asus P5W DH Deluxe sufficient for Crossfire (2x4850) or will it bottlneck?

[nib95]

I'm hearing something to do with PCI Express bottlenecks or something. Can someone tell me whether my motherboard would be able to manage Crossfire 2 x 4850 all right? Or is it best to stick with a 1 GPU (4870) solution till I get a better motherboard?

 

[akhilles]

Maybe since the board does CF X8:

http://www.asus.com/products.a...l1=3&l2=11&l3=248&l4=0

Or you can wait for the HD4870X2 coming out end of month or next month. The crown jewel.

 

[mkln]

i was also wondering about the same thing. according to tweaktown's review, even the PCI-E 2.0 8x (effectively 16x PCI-E 1.x) lanes are a bottleneck. i am still awaiting other reviews regarding this issue.

 

[nib95]

Originally posted by: akhilles
Maybe since the board does CF X8:

http://www.asus.com/products.a...l1=3&l2=11&l3=248&l4=0

Or you can wait for the HD4870X2 coming out end of month or next month. The crown jewel.

Likely well out of my price league. And honestly, the size of that thing scares me. It looks as though it would gobble up my PC and turn it in to a cooker lol.

 

[lopri]

As much as that board is one of my all time favorites, I have to be honest and say that it'll hold down some of CF performance. When I tested a HD 3850, using the second PCIe slot alone gave about ~10% less performance. For HD 3850, the CF bridges might help out a bit but HD 4850 is almost as twice as fast as HD 3850. You will be losing some performance.