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Crossfire 7770's BF3 FPS drop - Page 2

post #11 of 19
Thread Starter 
Z77 rather than H77 - revision 1.0 - and maybe that's it one of the slots is 4x

I don't know how to work out whether that would bottleneck or not, though there must be a formula.
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post #12 of 19
Quote:
Originally Posted by dogbiscuit View Post

Z77 rather than H77 - revision 1.0 - and maybe that's it one of the slots is 4x

I don't know how to work out whether that would bottleneck or not, though there must be a formula.

my bad. yes, even the Z runs off the souhtbridge. here, tsm106 explains it . . .

http://www.overclock.net/t/1361427/pcie-2-0-x4-enough-or-no#post_19307040
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post #13 of 19
Thread Starter 
Aha, looking at my motherboard block diagram, the x16 slot goes straight to the CPU but the x4 slot goes to the chipset and shares a bus with the other slots and ethernet controller.

So what board would run both slots off the CPU ?
Edited by dogbiscuit - 5/25/13 at 8:15pm
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post #14 of 19
a lot of them do. depends on your budget. most of them are up there. here are a few that are relatively cheap.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128544

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157294

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131837

http://www.newegg.com/Product/Product.aspx?Item=N82E16813138354

you have to scroll down under details and check the Expansion slots. i think most 1155 boards can only run X8X8.

edit: i noticed the Gigabyte on that list has exposed mosfets, which can lead to poor overclocking result. it could be a factor if you choose to upgrade to a 'k' version of ivy. i imagine we will go haswell or the next gen for our upgrade.
Edited by rdr09 - 5/26/13 at 3:14am
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post #15 of 19
I think you're running out of vram, set textures to High, Mesh to High or Medium and turn off msaa.
post #16 of 19
Thread Starter 
I did something much better, took out the 7770's and swapped in a 7850. Problem solved the easy way. Pretty good these 7850's.
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post #17 of 19
Quote:
Originally Posted by dogbiscuit View Post

I did something much better, took out the 7770's and swapped in a 7850. Problem solved the easy way. Pretty good these 7850's.

best solution. good job, man.
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post #18 of 19
Thread Starter 
What happens if i try and crossfire a 7850 with a 7770, flash-bang-smoke or just a fail ? Or with luck a system boost ?
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post #19 of 19
Quote:
Originally Posted by dogbiscuit View Post

What happens if i try and crossfire a 7850 with a 7770, flash-bang-smoke or just a fail ? Or with luck a system boost ?
it would boot its not going to cause a nuclear meltdown lol but the crossfire isn't going to work and it would just use whoever card is in the x16 slot

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