Asus board for crossfire hd 5770

I am looking at the following board:

Asus P7P55D $170 before combo rebate:

How does the following affect crossfire performance:

2 x PCIe 2.0 x16 (single at x16 or dual at x8/x8 mode)
1 x PCI Express 2.0 x16 slots (at x4 mode, 2.5GT/s)

Ive read a few discussions that claim that x8/x8 with a lowish end card (5770) will not give you a good increase in performance.

Im interested in crossfiring two 5770's down the road but not sure about this mobo.....

4 answers Last reply
More about asus board crossfire 5770
  1. ohhh i see....disregard.

    I found the answer in the Graphics Card sli/crossfire FAQ.

    Looks like x 8 should perform well. Glad i ditched the X4mobo
  2. i'd suggest u get the 5850 instead of 5770 crossfire... cheaper and performs faster
  3. how is the 5850 cheaper? Newegg has it at $300.....while the 5770 is like $164?

    I would love to have purchased a more powerful card, but i have a limited budget and i cannot drop that kind of money soley on a gpu.

    thanks for the tip though!
  4. 5770 crossfire = 2 X 5770 = $164 X 2 = $300+ = more costlier than a 5850...
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