@agarb 

I'm having the exact model, my signal reading is as following for your reference :

Noise Strength: -92dBm

SNR : Between 44dB to 46 dB

My source internet speed is 500mbps, speed at my destination is around 370mbps.

If you are not getting the speed that you would expect, it could be your router problem.

I had a similar problem previously with my Dlink Router, everything resolve when I replace that router with TPLink Archer AX73.

Anyway, just my sharing and good luck. 

Hope this is helpful.  

Thanks.

https://www.wilsonamplifiers.com/blog/what-is-snr-and-how-does-it-affect-your-signal/

What is a Good SNR Value?

Whether or not you have a good SNR value depends on what type of signal you’re working with. Generally speaking, you want as high an SNR value as possible.

Here’s a basic rundown:

• >40dB SNR = Excellent signal (5 bars). Lightning fast, always associated
• 25dB to 40dB SNR = Very good signal (3 - 4 bars). Very fast, always associated
• 15dB to 25dB SNR = Low signal (2 bars). Usually fast, always associated
• 10dB - 15dB SNR = Very low signal (1 bar). Mostly slow, usually associated
• 5dB to 10dB SNR = No signal, almost never associated, agonizingly slow