Ok. I don't think its an issue with wifi card.
Reason 1 : When ethernet cable is connected directly to
laptop speed is above 70 mbps, but when ethernet cable is connected to
router and from output port of the router, if Lan is connected to laptop, speed is below 30 mbps.
In this scenario, no wifi card is involved and I believe it should be the same ISP speed that I must be getting. This also means to me that the moment
A9 router is in between, there is a lag of 40-50 mbps speed.
Reason 2: In the last 3-4 weeks, Along with
TP-Link and
Asus models I had tested
Netgear R6220. This consistently gave above 60-70 Mbps range in a surface pro 6.