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x16 Possible for 4th PCI-E Slot on RIIIE?

post #1 of 6
Thread Starter 
I'm a bit confused right now. All four slots are hardwired for PCI-E x16 and in all documentation, Asus always refers to them as x16 slots.

Here's an image from a Crosshair demonstrating the difference in wiring between an x16 slot and an x8 slot:



Please note that on the RIIIE, they're all wired like the top slot on the image, meaning they should be x16 capable.

I'm trying to run one card in the bottom slot. Since the RIIIE has switches to turn the slots on and off, I've tried messing with those but I can't coax x16 out of it. So did Asus do it just for the marketing? So they could claim four x16 slots (although the second and fourth cannot possibly run at that bandwidth)?

A few things to note, don't tell me to move the card and don't tell me x16 and x8 are practically the same. When your GPU is frozen and running at 1160/1200, they're very different.
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post #2 of 6
im almost certian it can run at 16
post #3 of 6
Thread Starter 
Wanna try?
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post #4 of 6
can my board caught fire im waiting on advanced rma cause i got no hs's sad thing is they dont stock them so ive been waiting for months
post #5 of 6
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post #6 of 6
it should be able to tun 16x, is there anything else in any of the other slots? check your BIOS, try disabling SATA6G and USB 3.0.
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