Hey, so my Gf is running a Gaming 7 Gigabyte Mobo, 6600K, and a 380X GPU. She had a older wifi card rated for 300 Mbps, but her games were suffering from lag and upon further analysis, she was only gettings 70 Mbps TOPS. We have a $300 AX router and pay for gigabit speeds. We got her the same AX wifi card I have in my rig and she's still only getting 70 Mbps tops whereas I'm getting 550ish. I have made sure all drivers are up to date, Latest BIOS installed, nothing fixes it. I am arriving at the conclusion it has to be something wrong with the now 5 year old motherboard.