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PCI-E x16 is only PCI-E x8 electrical?

post #1 of 19
Thread Starter 
I had a question on This Motherboard

In the picture is has the middle PCI-E x16 slot labled as:
PCI-E x16
(electrical x8)

Please explain this to me.
Thanks!

(Picture attached as thumbnail)
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post #2 of 19
Theres 3 PCI-E slots on that mobo right?
post #3 of 19
This slot accepts PCI-E 16x cards but only at 8x speeds.

It is ment for physics cards not graphics cards, the 2 PCI-E 16x slots flanking it are ment for the SLI'd video cards. Physics doesn't require (yet atleast) that much bandwidth, so 8x can be used.
    
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post #4 of 19
Thread Starter 
Quote:
Originally Posted by wire View Post
Theres 3 PCI-E slots on that mobo right?
Yes, there are 3 PCI-E x16 slots on the motherboard.
Why would the middle one be labled like that?
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post #5 of 19
x8 is still good for just about everything underneath a 8800 or HD 2900 as far as I know. The Asus M2N-E SLi runs in x16 if one card is in and x8 if two cards are in, but you could still run two 7950GT's in it without a problem.
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post #6 of 19
Because the middle one is supposed to be used by a physics card for future triple sli/physics thing which will never happen now.

The top and bottom slots are full 16x for SLI use though.


Even the top of the line video card would run on 8x almost the same as on 16x. They use nowhere near the maximum bandwidth of those slots.
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post #7 of 19
does that just mean that you can have another card if you need more monitors or something

it still has sli 16x slots (and 8x electrical means that it'll process half the data of a 16x slots, which isnt noticable)
post #8 of 19
Quote:
Originally Posted by eureka View Post
does that just mean that you can have another card if you need more monitors or something
I have heard of people arranging for SLI plus a PCI card for more monitors, but I am not entirely sure if you can have SLI plus a PCI-E card in the middle slot for multiple monitors.
    
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post #9 of 19
Thread Starter 
How many monitors do you need? Each graphics card should support 3.
Would you want like 9/16 monitors to make a giant screen?!?!
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post #10 of 19
If they don't use anywhere near the maximum bandwidth, then why are they coming out with a new pci-e 2.0 specification?
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