Yeah no speed drop in all scenarios regardless of temperature.

The replacement unit - S/N 673706478C5D seems good!

I've also RMA-ed mine. The seller sent a new one from a newer batch. Going to receive it today. Will test in next few days...

Packet loss increasing with temperature looks very much like a hardware issue - marginal Ethernet PHY, not likely to be fixable by software. What rate of packet loss is considered as acceptable? From the router's terminal I've done ping test to the server of my ISP and got approx 0.05% packet loss ...

Low speeds from distant servers can be explained by packet loss. See the formula for throughput of a TCP connection: http://en.wikipedia.org/wiki/TCP_tuning#Packet_loss Even small packet loss like 0.1%, combined with typical RTT over the Internet, is significant. TCP just works that way, remember i...

UPDATE4. Indeed, cooling down the router in a refrigerator a bit fixes all the symptoms. UPDATE5. The customer support has suggested a test: to put the ethernet interfaces into a bridge (after setting master-port=none). I think, the intention of this was to check whether the problem comes from the s...

What ver. RouterOS and firmware on your RB?.

6.35/ 3.31

Hi, I also have a weird problem with ethernet performance of HAP AC (6.35). Here is the summary: The good: 1. The Speedtest.net over both wireless (ac) and ethernet gives the same result on the same server; 2. Ethernet performance in local network is also good. Copied a file from one PC to another,...

The one I am testing has horrible wlan performance. Pings are long. Downloads seem to top out around 11-15Megs on 2.4. 56 on 5 gig. I think I had a similar issue with 2.4 band. It seems there is a bug in current software and the workaround for me was setting the 2.4 wireless channel to auto. Any ot...

Hi, I also have a weird problem with ethernet performance of HAP AC (6.35). Here is the summary: The good: 1. The Speedtest.net over both wireless (ac) and ethernet gives the same result on the same server; 2. Ethernet performance in local network is also good. Copied a file from one PC to another, ...