My GPU is running at 8x instead of 16X
stealth1111
Canada Member
in Hardware
My GPU is running at 8x instead of 16X
my mobo is My asus z-97-e
when i plug in any thing on the second PCI-E slot it makes my first slot run at 8X
because all my PCI E X1 is been BLOCKED by my Graphics card.... so i plugged in my Wifi PCI E on the second slot of PCI E X16
any ideas how to fix this?
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From your user manual. It looks like you might need to find a setting to ensure you are in "single vga/pcie" mode instead of dual.
Just to confirm:
In this image, confirming your setup:
yes that is correct Slot 1 is used by Sound card
To confirm that you are looking at the right problem:
If that works, then you can look for a setting to limit second slot bandwidth to x8, or something similar. There are a number of settings/options referenced that you might look out for here: https://graphicscardhub.com/gpu-pcie-running-x8/. I would start with looking for a setting to limit bandwidth, then updating BIOS if available, and go from there.
when i remove the Wifi card my GPU is back to 16X
Okay, sounds like you are on the right track then. Start looking through BIOS for settings!
this line makes it seem like you might be out of luck though:
yea... i was looking all over the Bios no luck its a cheap Mobo so yea lol..........
Thanks Tushon your always Msg me back on all my Posts your a life Saver!!!!
i might make a another post later on. On making a NEW PC!!! this pc is 7+ years old thinking of making a new PC not sure yet!!! i hope you will be there for me on that 1 too hahahh
Thanks alot!!!
So have you tried the GPU in slot 2 and he others in the 1x slots?
It's not a motherboard setting. It's a hardwired division of the PCIe lanes and there's no way around it. Almost every motherboard outside the high-end consumer range does something similar. Best case here is to plug your wifi card into the PCIEx1_3 slot if your GPU isn't blocking it.
Yikes, so to bring up this post from the dead, note that I'm not so sure that it makes a difference whether you're using an x8 vs. x16 PCIe slot, especially if you have a higher end GPU. Tests that I've seen "on the intertubez" has suggested that it makes <2% difference for most gaming related tasks, which is generally "insignificant, and probably within margin of error". I think where it makes more of a difference is in cases where you have a LOT of transfers to the GPU (which doesn't really happen in games - the geometry information sent to GPUs are usually much smaller than the workload that the GPU does to render all of those pretty pixels. Which means that while there is a limit on how fast you can send information to the GPU, the vast majority of the work the GPU has to do is processing an image, not getting more information for the next image to render, so that limit doesn't really matter that much. Note that much of this I got from PCIe 3.0 x8 vs. x16: Does It Impact GPU Performance?, which is more or less in line with what I was expecting (whew!)
This isn't true for certain "professional" workloads, where the GPU might be continuously talking with the CPU (or if your machine is old enough, SLI/Crossfire which does plenty of GPU-CPU-GPU traffic where that might noticeably limit frame rates).