I just installed an AX200NGW wireless network card in my Dell Inspiron 5566 laptop for access to my 5ghz network at home. The original card was a Qualcomm QCNFA335. Over 2.4ghz I was pulling 35mbps down, and 25 up. Now over 2.4ghz I'm pulling 8mbps down and 55up, and over 5ghz I'm pulling 12mbps down and 320 up (940/880 Frontier FiOs).
I installed the latest drivers from Intel for bluetooth and wifi.
Any ideas why the download speeds have decreased? I know this isn't a high performance laptop, but it shouldn't have decreased in wifi performance.
Intel hates me saying this, but I believe that there is a systemic bug in their Wireless drivers that is responsible for the slowdowns and disconnections that are being reported across the Intel wireless solutions.