Wifi Adapter Disconnecting from Wifi Router

Hello Guys,

My pc is around 5 years old, recently I started having cut outs in my wifi connection. I have comcast but since the modem is far away, I use a network card to connect to the router. The router I use is NetGear R6250 its an AC compatible router or wifi 5 as now its called. My wifi card in my PC is GIGABYTE GC-WB867D-I. I upgraded to 600 Mbps Speed with comcast and I know my router is cable of giving me the speed but ever since the upgrade (or so I think) the network card keeps dropping connection. I connect my phone to the same AC wifi and no problems so far. I also check speeds and I only get around 70-100 Mbps on PC but on my phone I get around 300-350Mbps. I checked the specs of my network card it is capable upto 800 Mbps. Is there anyway I can narrow down that my network card is going bad? I just want to be sure before I invest in another one. Also please link if you have a recommendation for a good wifi 5 card. I cant get wifi 6 because then I would have to change my router too which I don't want to do.

Any help is greatly appreciated.
Thank You

Ztruker said:

When do the drop outs occur?? Is it while you are using it or after your return from sleep mode?

By WiFi 5 do you mean a dual band 2.4/5Ghz?

dual band 5 Ghz, drop out occurs when using computer like watching videos etc. I changed out my network card and also connected ethernet to my PC. My ethernet also had a dropped connection yesterday so maybe the network card was not malfunctioning.