What is the reason for the 30% drop in reading speed?

Question

RAM

Good afternoon!
System:
CPU: Intel Core i5 8600k
RAM: 16 GB DDR4 Corsair Vengeance 3000 Mhz
Motherboard: ASUS Prime Z-370P
Video card: GTX 1070
My results in AIDA 64:

Results found on the Internet:

Question: what could cause such a significant drawdown in performance?

Answer 1

pay attention to the memory type on both screenshots: you have a single-channel mode, they have a dual-channel one.