Corsair 2400Mhz RAM running at 2133MHz - Faulty Module?

[scrm3r]

So I recently updated my system from G4560 to Ryzen 5 1600 with Asrock B450 Fatality Motherboard. I had an existing 8gb ram module(2yr old), so i purchased another module of the same model number (CMK8GX4M1A2400C16R) and added it to my motherboard. Previously I wasnt using XMP and I didnt noticed it back then, but when I went to BIOS to overclock my CPU, I noticed that my ram is running at Dual Channel configuration with 2133MHz. I have since then booted my PC with both stick in place, and also individual stick at a time. The older one runs at 2133Mhz by default while the newer one runs at 2400Mhz, so when they are running at dual channel config it is slowing down to 2133Mhz. 

 

I must add that with XMP profile activated both ram are running at 2400MHz at the rated latency CAS 16-16-16-39. What I wanted to know, is this a faulty ram or is it working as intended? Below are the CPU-Z screenshot of the ram in stock settings (without XMP)

 

Dual Config

 

 

Single Faulty

 

 

Single Okay

[ZephCloud]

Is xmp on?

[scrm3r]

Just now, ZephCloud said:

Is xmp on?

The screenshot are the one with XMP off, however as I mentioned in the post I am getting 2400MHz with XMP on. 

 

My doubt is while the newer one runs at 2400Mhz without XMP and the old one at 2133Mhz, is the old one faulty or is it expected behavior. Both ram have same model no, CAS rating and speed. However the version differs as one is 2yr old and the other one is from latest batch. 

[ZephCloud]

2 minutes ago, scrm3r said:

The screenshot are the one with XMP off, however as I mentioned in the post I am getting 2400MHz with XMP on. 

 

My doubt is while the newer one runs at 2400Mhz without XMP and the old one at 2133Mhz, is the old one faulty or is it expected behavior. Both ram have same model no, CAS rating and speed. However the version differs as one is 2yr old and the other one is from latest batch. 

Nah it's alright...by default without xmp my 3200mhz cl16 ram runs at 2133mhz...I use msi's memory try it! Set to 3733mhz and changed to timing to cl18...

[porina]

When XMP is off, it uses the JEDEC profiles. The old stick only has 2133 profiles, and the new stick has 2400 profiles. So if both are used without XMP, it'll run at 2133.

 

Both have XMP profiles at 2400 16-16-16-39... so with that on, it'll run at that speed.

 

It should be noted the old module is dual rank, and the new module is single rank. They're not the same even if the part number is. This is part of the danger of buying what appears to be the same at different times. They probably changed the chips used in the module over time.

[scrm3r]

Just now, porina said:

When XMP is off, it uses the JEDEC profiles. The old stick only has 2133 profiles, and the new stick has 2400 profiles. So if both are used without XMP, it'll run at 2133.

 

Both have XMP profiles at 2400 16-16-16-39... so with that on, it'll run at that speed.

 

It should be noted the old module is dual rank, and the new module is single rank. They're not the same even if the part number is. This is part of the danger of buying what appears to be the same at different times. They probably changed the chips used in the module over time.

Yeah I also noticed the rank difference, thankfully they are working fine. Thanks for the explanation, i think i will close the thread.