Ethernet disconnects during heavy load

Hi. After three weeks of using the motherboard (B650M-HDV/M.2), I started having internet problems: every 3-5 minutes, under heavy load (e.g. gaming), my internet goes down for a few seconds. I tried installing a clean Windows and it didn't help. I reset my BIOS to default settings and it didn't help. Of course I turned off all power saving settings in the network adapter settings and installed the latest drivers and it didn't help. Than I connected another PC with the same ethernet cable and everything works fine. I bought a USB ethernet adapter and everything works fine. I have concluded that the problem is with the motherboard, but I really don't want to return it to the store. Are there any other options left to fix the internet problem? Thanks.

Updating to the current version of the bios (2.10) didn't fix anything. Does this mean that the problem is in the hardware of the motherboard itself?

cyberlor wrote: Same exact problem here. Even installing the latest Realtek drivers from RT website and the last available bios. The chip is probably faulty on this specific board. Too bad, because it's a very good one.

Yeah, that's too bad. I'm still continuing to install the latest updates, hoping that might fix this problem.