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Is this motherboard bad for crossfire? - Page 2

post #11 of 17
How bout an ASRock 890GX PRO3?
8x-8x and cheaper too
Find it on Newegg
post #12 of 17
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
How bout an ASRock 890GX PRO3?
8x-8x and cheaper too
Find it on Newegg
The ASRock 890GX PRO3 board - http://www.newegg.ca/Product/Product...82E16813157244 ?

Newegg has it listed as x16/x4, is it actually x8/x8? Because that would be amazing!
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post #13 of 17
Quote:
Originally Posted by MIKEVALL View Post
lets say you have a 16x PCIE card in a 4x slot, it will run at 1/4th the speed. Go with the 2 16x slots if you want to run a badass CXF
I dont think it works like that ....just saying...



source:

http://www.tomshardware.com/reviews/...x4,2696-3.html

i wouldn't worry about it on any low to mid range card
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post #14 of 17
Thread Starter 
Personally I still consider 2x5850 high end since it is pretty much equivalent to a 5970, and I think based on the more recent article from toms.. http://www.tomshardware.com/reviews/...e,2887-10.html, there is a pretty noticeable difference between x8/x8 and x16/x4. Which I believe would be noticeable in the minimum frame rate department.

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post #15 of 17
Or any of the Asus 890FX boards will support BD as well.
post #16 of 17
Quote:
Originally Posted by anotheralex View Post
Personally I still consider 2x5850 high end since it is pretty much equivalent to a 5970, and I think based on the more recent article from toms.. http://www.tomshardware.com/reviews/...e,2887-10.html, there is a pretty noticeable difference between x8/x8 and x16/x4. Which I believe would be noticeable in the minimum frame rate department.

It's only noticeable in like 1 game really.

Other than that, you really won't notice a difference at all unless you have them side by side in comparison. Either way you'll be getting the effects of Crossfire in your system and you'll be getting higher frames overall.

Personally, I'd wait for the Sabertooth 990FX and save your money. But if you are Crossfiring on a budget, an x16/x4 board will be just fine, and you'll still notice an improvement.

It's actually one reason why I'm considering going Crossfire instead of SLI with my next GPU, incase I need to budget it up and get the board you listed
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post #17 of 17
Quote:
Originally Posted by mannyfc View Post
I dont think it works like that ....just saying...



source:

http://www.tomshardware.com/reviews/...x4,2696-3.html

i wouldn't worry about it on any low to mid range card
Actually thats a big loss ( imo)
I do believe im correct, its just the end result never turns out to be 1/4 less
PCIe 1.x supports a data rate of 250 MB/s in each direction, per lane. This means a sixteen lane (x16) PCIe card should be capable of 16×250 MB/s = 4 GB/s in each direction. But this all depends on lots of factors ,determining what it actually puts out!


http://www.tomshardware.com/2007/03/...sis/index.html

"qoute from this review" ( and this was a few yrs ago )


The conclusion of our 2004 PCI Express analysis was simple: x4 PCIe bandwidth typically was sufficient to run single graphics cards without creating an interface bottleneck. At that time, x8 or x16 link widths were not necessary, and AGP was still powerful enough.

However, the situation clearly is different today, as we found that only four PCI Express links are no longer adequate. Although there are differences between ATI/AMD and Nvidia, and between games and professional graphics, most applications deliver best performance at x16 PCI Express speeds. The two 3D games we used - Quake 4 and Call of Duty 2 - certainly cannot be called demanding these days, yet they benefit somewhat from faster link speeds. The professional benchmark SPECviewperf 9.03 was the real eye-opener, as it categorically disqualifies PCI Express link speeds below x16.

The benchmark results make pretty clear that chipsets and motherboards need to be capable of supporting all graphics cards at the full x16 PCI Express speed. If you run high performance graphics cards on inadequate interfaces such as PCI Express x8, you give away performance.
Edited by MIKEVALL - 5/24/11 at 4:48am
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