GPU-Z only showing x8 PCI-E lanes??
hey all, im a little worried, GPU-Z is showing Bus Interface PCI-E x16 @ x8
What does that mean, why is not not running at the full x16 lanes? any insight would be greatly appreciated. Cheers
More info please. What mobo and GPU, and which slot are you running it in?
Do you have a sound card in another PCI-E slot?
Card is in first PCI-E x16 slot, no other slots are filled up, using onboard mobo sound. no sli, 1 single card.
even when game is running, still showing @ x8.
either way(one or two) you should have 16x. i dont know that particular board(was thinking p55 but its x58)
ASUS offers three PCI-Express 2.0-compliant ports on the P6X58D-E: the first slot offers 16x link lanes, the second operates at 16x lanes or switches to 8x whenever the third slot is occupied, which also operates at 8x. In a two-card graphics setup using either ATI CrossFire or NVIDIA SLI configuration, the first two PCI-E 2.0 ports operating at 16-lanes per video card offers the most ideal bandwidth.
While adding a third video card for triple-SLI or CrossFireX won't come close to bandwidth saturation and should not see any measure of reduced performance for most video games, there could be a penalty for using that third PCIe slot when SATA6G (Marvell 9123) and USB-3.0 (NEC D720200F1) are enabled. Intel's X58-Express offers 32 total PCI-E 2.0 link lanes reserved for graphics, and the Intel X58 IOH provides an additional four lanes that can be used for graphics or I/O for a total of 36 PCI-Express lanes. More likely uses of those four lanes will be the DMI link, Marvell, and NEC chips, which will share those lanes or borrow as-needed for normal operation.
yeah, so I should be getting full x16 lanes. Should I try reseating the card in the 2nd PCI-E slot?
I'd give that a go. I'm not familiar with that particular board, but there's no jumpers or bios settings to change the PCI-E lanes around is there?
Hmm, that didnt work, still showed up @x8.
The only jumpers are for overvolts. The only thing in the BIOS is for the 2nd and 3rd PCI-E buses. The manual says the first one will always be x16.
So im thinking that GPU-Z is just not displaying the right info?? is there any other programs that will show that info?
everest. maybe a bench software. youre not losing much anyway. but it'd be enerving. probably suga is right, bios fiddling.
_dangtx_ is correct, the difference in performance has been shown to be minimal with current generation video cards. IIRC it's less than 3%, or likely only 1-2 frames per second.
But I'd be trying to figure out why too. When I had this same issue, it was because I had my sound card in the wrong PCI-E slot, causing my slot 1 to downclock to x8.
hmm, ok, i wont worry about it too much. maybe try a different program/benchmark to double check. Couldn't find anything in BIOS or manual.
Thanks for the help though, HWinfo is showing same thing as GPU-Z. hmm, it is strange though, might look into it a bit later.
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