GPU on pcie x16@x4 3.0

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   Motherboard: AsRock Z97 extreme4

Cpu: Xeon E3-1231 v3

Gpu: Msi GTX970

Ram: 2x8Gb

OS: Windows 10

GPU-Z and
speccy tell me that my GPU is running on a x16 pcie-port @x4 3.0. Why is it
only x4? 

This doesn´t
change when I use the build in GPU-Z performance test. The test only changes
the speed from 1.0 to 3.0 but the lanes stay at x4.

I´m using
the upper pcie port (PCIE2) and there are no other pci-cards in the motherboard
now.

I tried the
PCIE5 port which is meant for a second GPU at x8. This time GPU-Z tells me I´m
using a x16 port at x8 3.0 which should be correct.

I also
tried a different GPU (GTX1080) but nothing changed.

I´m using
the newest drivers for the GPU and the motherboard. I also reinstalled windows
10.

Can anybody
help me?

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Hiro Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Sep 2017 Location: Austria Status: Offline Points: 4	Post Options Post Reply Quote Hiro Report Post Thanks(0) Quote Reply Topic: GPU on pcie x16@x4 3.0 Posted: 14 Sep 2017 at 1:30am
	Motherboard: AsRock Z97 extreme4 Cpu: Xeon E3-1231 v3 Gpu: Msi GTX970 Ram: 2x8Gb OS: Windows 10 GPU-Z and speccy tell me that my GPU is running on a x16 pcie-port @x4 3.0. Why is it only x4? This doesn´t change when I use the build in GPU-Z performance test. The test only changes the speed from 1.0 to 3.0 but the lanes stay at x4. I´m using the upper pcie port (PCIE2) and there are no other pci-cards in the motherboard now. I tried the PCIE5 port which is meant for a second GPU at x8. This time GPU-Z tells me I´m using a x16 port at x8 3.0 which should be correct. I also tried a different GPU (GTX1080) but nothing changed. I´m using the newest drivers for the GPU and the motherboard. I also reinstalled windows 10. Can anybody help me?

ASRock_TSD Members Profile Send Private Message Find Members Posts Add to Buddy List ASRock_Official Joined: 20 Mar 2015 Status: Offline Points: 8907	Post Options Post Reply Quote ASRock_TSD Report Post Thanks(0) Quote Reply Posted: 15 Sep 2017 at 11:36am
	Dear Hiro, Thank you for choosing ASRock. Regarding your case, we provide some suggestion. 1. Clean up the PCIe slot. 2. Check with latest version GPU-Z. 3. Install the latest NVIDIA driver. 4. Run GPU stress test to check if the graphic card is running at PCIe x16 speed. Thank you! Yours truly, ASRock TSD

Hiro Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 Sep 2017 Location: Austria Status: Offline Points: 4	Post Options Post Reply Quote Hiro Report Post Thanks(0) Quote Reply Posted: 17 Sep 2017 at 12:39am
	Hi! I already cleaned the slot. I'm using the latest version of GPU-Z and the latest drivers from nvidia. I tested the PCIE2 (x16@x4) slot and the PCIE5 (x16@x8) slot with the "3DMark fire strike" benchmark test. I get about 5% better results with the PCIE5 slot. When I use the PCIE2 slot it stays at x4 all the time even though the FurMark stress test is running. Edited by Hiro - 17 Sep 2017 at 12:47am