So I built a PC the other day using:
MSI B450 Mortar Titanium MB
Ryzen 7 3800X
Corsair Vengeance LPX 2X8GB DDR4 2400MHz CL16 CMK16GX4M2A2400C16 (2 sets, total of 32Gb by 4 sticks of 8gb (2 sets of 16gb))
Kingstone A1000 nvme 480gb SSD
Asus RTX 2080TI Dual Advanced GPU
Samsung EVO 850 480gb
Coolermaster 750W platinum 80+ PSU
then I updated the bios to the last version (16/6/2020 ver) and then went into the bios and switched to XMP mode,
BUT I went into a problem...., when I tested the PC using Userbenchmark my memory went like 60 to 72 percentile which is a very low score, then I opened the CPU-Z software and saw the following information:
Slot#1: 8gb 2400Mhz
Slot#2: 8gb 2133Mhz
Slot#3: 8gb 2400Mhz
Slot#4: 8gb 2133Mhz
PLEASE(!) if someone can tell me why does the CPU-Z is showing some of the memory sticks as 2133Mhz and not 2400Mhz????
Can someone help me to solve this issue?, thanks in advance!!
Yes, 16-16-16-39 1.2v.
It needs to be said though that you're not losing -a lot- of performance with those speeds, -maybe- 1%, as AMD's work with the memory controller on the Ryzen 3000 series means memory speed is no longer paramount.