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5770 Crossfire on 16x / 4x - Page 3

post #21 of 25
Yay, I was thinking about this last night. I am planning on trading my amd for a p55 setup.
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post #22 of 25
I'm running two 4850s on a 16x / 4x PCIe 2.0 board. I've run 3Dmark Vantage a bunch of times, and there isn't any noticeable performance difference with my setup than the benchmarks posted on the web in reviews, at 16x / 16x or 8x / 8x. I'd probably need to repeat the mark a whole bunch of times to get a good sampling size, but if there is a negative effect, I can say with confidence that it is very small.

I would imagine (though not certain) that a 4x PCIe 1.x would be a bit more noticeable bottleneck, however.
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post #23 of 25
Thread Starter 
Quote:
Originally Posted by aurance View Post
I'm running two 4850s on a 16x / 4x PCIe 2.0 board. I've run 3Dmark Vantage a bunch of times, and there isn't any noticeable performance difference with my setup than the benchmarks posted on the web in reviews, at 16x / 16x or 8x / 8x. I'd probably need to repeat the mark a whole bunch of times to get a good sampling size, but if there is a negative effect, I can say with confidence that it is very small.

I would imagine (though not certain) that a 4x PCIe 1.x would be a bit more noticeable bottleneck, however.
Thats good to read, eventho you are using another videocard as well another mainboard.. but good to read once again that performance on 16x / 4x is still really good.
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post #24 of 25
Thread Starter 
Now the last thing i wanna be sure of is..
Is my x4 slot really a 2.0, or does it run on 1.1?

On Asus website this is written:

1 x PCIe 2.0 x16 (single at x16)
1 x PCI Express 2.0 x16 slot (at x4 mode, 2.5GT/s)
2 x PCI Express 2.0 x1 slots (2.5GT/s)

That looks like v1.x, as 2.0 is double the speed afaik.. why does it need to be so "complicated" lol
Edited by rck1984 - 3/18/10 at 6:03pm
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post #25 of 25
Thread Starter 
Allright, i decided to go for a 5850 instead of Crossfire 5770, something some of you suggested before. I thought it wouldnt be possible to return my 5770, but it is possible.
Now one last thing, the guy from the store told me they only have a MSI 5850 in stock, would this be a good choice for a 5850? i dont find that much about the MSI on the net compared with ASUS or Sapphire.
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