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x8 or x16 crossfire for AMD HD 6950 - Page 2

post #11 of 20
The difference between 8x and 16x is as small is a margin of error. You have nothing to worry about.
post #12 of 20
(from experinace nothing less or more)

X8 by x8 is perfectly fine and tested on a friends set up with 16x by 16 and only diffrence was about 1fps ... even then that was not at minimum FPS but max. So you will be fine bro
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post #13 of 20
Quote:
Originally Posted by tsm106 View Post
There's no maybe about it, x8 will kill a 6990 or 590 because you'll be running each card at x4/x4.
I was pretty sure it would, but I've never owned one nor looked for info on x8 with high end dual GPU cards. Was an educated guess
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post #14 of 20
I was thinking about getting a 6990 when they are in stock some place but with my mobo I guess I will be bottlenecking the card since with only 2 slots it will split it x4/x4/x8 when paired with my 6970? So I would need a new mobo with 3 slots min and space them out to not split the bandwidth?

Quote:
Originally Posted by tsm106 View Post
There's no maybe about it, x8 will kill a 6990 or 590 because you'll be running each card at x4/x4.
post #15 of 20
Quote:
Originally Posted by Topgearfan View Post
I was thinking about getting a 6990 when they are in stock some place but with my mobo I guess I will be bottlenecking the card since with only 2 slots it will split it x4/x4/x8 when paired with my 6970? So I would need a new mobo with 3 slots min and space them out to not split the bandwidth?
x4 width carries a 25% loss over x8/x16 comparatively. With a trifire setup, you'd need x8/x8/x8 total or x16/x8. In sandybridge terms you need a nf200 board since 1155 doesn't support more than x16. So yea, you'd need a new board.
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post #16 of 20
Damn, This is what I get for listening to a sales person when I bought my parts. Well I guess I will get an SSD and a new board but then I think I may have issues with reinstalling Win 7 since my copy is an OEM builders pack copy. I will have to call MS to see if they will give me a key since I am having to replace the board. I was thinking of getting the Asus maximus-z or the PRO WS REVO board that has 4 slots. Good choices?

Quote:
Originally Posted by tsm106 View Post
x4 width carries a 25% loss over x8/x16 comparatively. With a trifire setup, you'd need x8/x8/x8 total or x16/x8. In sandybridge terms you need a nf200 board since 1155 doesn't support more than x16. So yea, you'd need a new board.
post #17 of 20
Quote:
Originally Posted by Topgearfan View Post
Damn, This is what I get for listening to a sales person when I bought my parts. Well I guess I will get an SSD and a new board but then I think I may have issues with reinstalling Win 7 since my copy is an OEM builders pack copy. I will have to call MS to see if they will give me a key since I am having to replace the board. I was thinking of getting the Asus maximus-z or the PRO WS REVO board that has 4 slots. Good choices?
I hate sale's staff at electonics stores.....
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post #18 of 20
Quote:
Originally Posted by KhaoticKomputing View Post
I hate sale's staff at electonics stores.....
Yup that's why we have places like OCN to help people pick the right equipment. I've gone into many PC stores where the staff only had a very basic knowledge of components.
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post #19 of 20
Here is test of x16/x16 vs x4/x4 http://www.hardocp.com/article/2010/...x16x16_vs_x4x4 no difference at all except aliens vs predator which seems buged look at BC2
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post #20 of 20
I run eyefinity and it does make a difference.

Quote:
Originally Posted by LukaTCE View Post
Here is test of x16/x16 vs x4/x4 http://www.hardocp.com/article/2010/...x16x16_vs_x4x4 no difference at all except aliens vs predator which seems buged look at BC2
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