I have a Gigabyte X99 SOC Force with the latest BIOS (F7a), Intel Core i7 5820k (28 PCIe Lanes), R9 290 with Arctic Accelero Xtreme IV and a PCIe x1 wifi.
The problem is my video card has a tall back plate which prevents me from installing it in PCIE_1 slot to get PCIe x16 3.0
I tried PCIE_4 and PCIE_2 slot but they only give me max PCIe x8 3.0 (note my PCIe wifi is installed on the x1 slot).
I am using a BenQ XL2420z which is a 1920x1080 with 144Hz refresh rate and the problem is my graphics card is performs poorly via PCIe x8 3.0
I did testing with my GPU on PCIE_1 slot (x16 3.0) and under many different games it was able to maintain a solid 144FPS without any dips but I had to remove my backplate to be able to fit it on PCIE_1 slot which resulted in my VRM's getting very hot (90c+).
If I put my GPU on PCIE_4 or PCIE_2 slot so I can have my GPU backplate my FPS on the exact same games never even reach 144FPS and it only hovers between 95~130FPS.
I am 100% sure it is not driver related as I completely remove any traces of the driver via using AMD uninstaller in control panel then use the latest version of DDU under safe mode to completely clean everything.
I need to run my GPU at PCIe x16 3.0 on either PCIE_4 or PCIE_2 slot if there is any way.
edit:
I also tried using the onboard dip switch for PCIE to turn off all the unused slot but it didn't make any difference.
The problem is my video card has a tall back plate which prevents me from installing it in PCIE_1 slot to get PCIe x16 3.0
I tried PCIE_4 and PCIE_2 slot but they only give me max PCIe x8 3.0 (note my PCIe wifi is installed on the x1 slot).
I am using a BenQ XL2420z which is a 1920x1080 with 144Hz refresh rate and the problem is my graphics card is performs poorly via PCIe x8 3.0
I did testing with my GPU on PCIE_1 slot (x16 3.0) and under many different games it was able to maintain a solid 144FPS without any dips but I had to remove my backplate to be able to fit it on PCIE_1 slot which resulted in my VRM's getting very hot (90c+).
If I put my GPU on PCIE_4 or PCIE_2 slot so I can have my GPU backplate my FPS on the exact same games never even reach 144FPS and it only hovers between 95~130FPS.
I am 100% sure it is not driver related as I completely remove any traces of the driver via using AMD uninstaller in control panel then use the latest version of DDU under safe mode to completely clean everything.
I need to run my GPU at PCIe x16 3.0 on either PCIE_4 or PCIE_2 slot if there is any way.
edit:
I also tried using the onboard dip switch for PCIE to turn off all the unused slot but it didn't make any difference.
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