Differing module SPD speeds!

[WarCreep]

I have installed 4 x 8GB DDR4 3200. However the system indicates one pair as 2667MHZ & the other pair 2133MHZ ! Both pairs should have identical SPD speed.

Anyone know why this has occurred?


Memory Model:
2 x gp-ar32c16s8k2hu416rd

https://www.gigabyte.com/Memory/AORUS-RGB-Memory-3200MHz--With-Demo-Kit#kf


Memory Model:

2 x gp-ar32Systemc16s8k2hu416r

https://www.gigabyte.com/Memory/AORUS-RGB-Memory-3200MHz-HCX2#kf



Photo of Modules:
https://i.imgur.com/ahWml2C.jpg

System Setting/BIOS :
https://i.imgur.com/cQz5Rsx.jpg


Spec:
Motherboard: Gigabyte Z390 Aorus Master Intel Z390
CPU: i9 9900K

 

[GregI]

As you can see by the SN numbers they are different batches and not even close to each other in manufacturing date.

Those values you see are just the jedec spec that the manufacturer decided to put in the spd data at the time to sllow you to boot in. They can change this especially if there was a big difference of time in the production run.

Regardless as long as you enable XMP you should get your 3200 speed. The numbers you see in BIOS at that partcular area don't matter.

 

[Tetras]

Are the 2666 ones the later sticks? A few years ago, 2133 was a pretty safe boot-up speed, but since DDR4 has matured, 2666 is fine for any Ryzen or Intel system you can buy right now. They don't usually go higher than 2666 with desktop memory, because that works fine at the default 1.2v.