Question GPU running in PCIe 4x 3.0 instead of PCIe16x 3.0 ?

[tr0pecs]

Hi,
Recently was wondering why I had bad performance on one specific map in CS:GO, someone mentioned having a similar issue to me and that changing the GPU slot made it run in the correct bandwidth fixing some of their issues.

I checked on GPU-Z wondering if my GPU was also running in the wrong mode and sure enough - it is, but that shouldn't be possible, considering my MB has only 1 PCIe slot, which is 16x 3.0.

System specs:
- Samsung EVO 970 NVMe SSD (Boot Drive)
- Kingston 240SSD
- Unnamed SSD 500GB
- Windows 10
- AMD Ryzen 5 3600
- 16GB HyperX DDR4 3200
- GTX 1060 6GB
- ASUS PRIME B450M-A Motherboard

During the stress test on GPU-Z as well as FurTest my GPU maxes out at x4 3.0. It isn't just like this idle.

The motherboard has only ONE PCIe 16x 3.0 slot, so it's impossible for it to be in the wrong one.

I have no idea what I can do to try and fix this, no guide has been able to help. Can the NVMe SSD have something to do with it?

 

[tr0pecs]

SOLUTION:

MAKE SURE TO CLEAN YOUR GPU CONTACT POINTS!!!

The moment i did it, I turned it on and it is immediately running in 16x mode again

 

[dwd999]

Hi,
Recently was wondering why I had bad performance on one specific map in CS:GO, someone mentioned having a similar issue to me and that changing the GPU slot made it run in the correct bandwidth fixing some of their issues.

I checked on GPU-Z wondering if my GPU was also running in the wrong mode and sure enough - it is, but that shouldn't be possible, considering my MB has only 1 PCIe slot, which is 16x 3.0.

System specs:
- Samsung EVO 970 NVMe SSD (Boot Drive)
- Kingston 240SSD
- Unnamed SSD 500GB
- Windows 10
- AMD Ryzen 5 3600
- 16GB HyperX DDR4 3200
- GTX 1060 6GB
- ASUS PRIME B450M-A Motherboard

During the stress test on GPU-Z as well as FurTest my GPU maxes out at x4 3.0. It isn't just like this idle.

The motherboard has only ONE PCIe 16x 3.0 slot, so it's impossible for it to be in the wrong one.

I have no idea what I can do to try and fix this, no guide has been able to help. Can the NVMe SSD have something to do with it?

The manual is not clear, but the little chart at the bottom of page X (10) implies that the PCIe slot is sharing bandwidth with the m.2 port. Unfortunately the technical writers at ASUS are never really clear on these things. Since you're using the m.2 as your boot drive it would be hard to check this out. (You'd have to clone your boot drive to another ssd and leave the m.2 port empty).