WLan Card doesnt work properly after PC Upgrade (CPU, MB & RAM)

Dec 21, 2018
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Hey guys, first of all my specs:

Asrock B450M Pro 4 (before Asrock 870 Extreme 3)
GTX 1060OC Gigabyte - 6GB
AMD Ryzen 5 2600X (before AMD Phenom X6 1055t, OC to 4Ghz)
2x 8GB DDR4 Ram - Corsair Vanegance, 3000MHZ (before 2x 4GB DDR3 1333MHZ)
Samsung Evo 860 500GB SSD
Samsung 1GB HDD 7,2k rpm
DVD/RW
Cougar A450 PSU

WLAN Card: Asus PCE-AC51 Wireless AC750

After the upgrade yesterday i got a strange problem with my WLAN PCIe Card

WLAN & the GPU are working fine, BUT when i start a Game (doesnt matter which game or if its a GPU Benchmark) the signal interrupts or is unusable (0,5mbit and 2000ms ping)
It happens EVERY TIME the gpu is being used!

Frist i thought its the problem of my PSU (only 450W) but its also happening with an underclocked CPU and the GTX 1050 2GB (which needs way less power)

New driver is installed and everything else is working fine!
I tried switching the PCIE Ports with the GPU, same Problem (just in case one slot is damaged).
Using the Card on the smaller PCI Port makes it even worse (Connection is only 20sec stable, then i can't reconnect to the network)

As i said, I don't think it's an PSU Problem (OC 1055t on 4GHZ needs more Power i guess, than the ryzen 5 2600x)

Maybe you guys could help me out!
Thanks
 
Dec 21, 2018
2
0
10
Just reinstalled windows... but same problem
Edit: just tried an old 2,4ghz card - seem to work but the bandwith seems to go down about 8-10 mbit during gpu benchmark, ping seems stable

I dont get it......