Hello,
I'm having issues with my new PCIe wifi card. The 2.4 Ghz wifi is only 4~ Mbps download and 8 Mbps upload and the 5 Ghz is 40-50 Mbps download and 180 Mbps upload. Hardwired I have stable 400 Mbps download and upload speeds. I've tried numerous drivers (TP link, Asus, Broadcom) and the end result is pretty much the same. My router is only a few meters away. I have  TL-WDR3600 N600 router which is quite old, do you think upgrading router would resolve my issue? If so, what router would you recommend?