Question I purchased 32GB of 2666Mhz Corsair DDR4 16GB(2x8) 2 show up as 2666Mhz and 2 show up as 2133Mhz

[dwjackson]

MOBO ASUS PRIME B450M-AII
CPU Ryzen 5-5600G
PSU Corsair Professional AX-850 Fully Modular

CMK16GX4M2A2666C16
DDR4 16GB(2X8GB) 20220694892060
2666Mhz 16-16-18-35 1.20V VER 4.32 2133Mhz
CMK16GX4M2A2666C16
DDR4 16GB(2X8GB) 20220694892061
2666Mhz 16-16-18-35 1.20V VER 4.32 2133Mhz

CMK16GX4M2Z2666C16
DDR4 16GB(2X8GB) 182220659344178
2666Mhz 16-16-18-35 1.20V VER 3.31 2666Mhz

CMK16GX4M2Z2666C16
DDR4 16GB(2X8GB) 182220559344179
2666Mhz 16-16-18-35 1.20V VER 3.31 2666Mhz

All made in TAIWAN

CMK16GX4M2A2666C16 VER 4.32
vs
CMK16GX4M2Z2666C16 VER 3.31

Is slightly different part number and VER number enough to show up as different speeds
If I swap channels the results are the same all sticks are all marked 2666Mhz
I am not overclocking
I have D.C.O.P set at 2666Mhz

thanks for any response

 

[SkyNetRising]

Can you show screenshots from CPU-Z - memory and spd sections?
(upload to imgur.com and post link)

 

[dwjackson]

I am running Debian 12.04 can you advise a way to do this on Debian?
Never mind I found CPU-x for Linux.
I was able to clock all 4 sticks to 3200Mhz which is fast enough for me.
I still don't understand why one channel runs at 2666Mhz while the other
channel is 2133Mhz

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Last favor I will ask of you how can I mark my posts solved?

 

[SkyNetRising]

I still don't understand why one channel runs at 2666Mhz while the other channel is 2133Mhz

That's not, how it works.
All ram works at same frequency.

 

[dwjackson]

OK it shows up that way in BIOS.
I was able to use AI Tweak and set speed to 3200Mhz after rebooting and verifying with CPU-x they are all now 3200Mhz.

 

[logainofhades]

Different ram kits with different base speeds, and timings.