RAM numbers question

[Moopey]

My PC normally has 4GB of RAM, its DDR3 and 1600 MHz. I have a 2GB DDR3 1333MHz lying around so thought why not have more RAM. I know that performance is not that huge between 1600 and 1333 MHz. I set the RAM to work in 1333MHz, inserted the 2GB stick and everything works fine. So I was exploring the BIOS some more and found this area about DIMMs where you can read info about your RAM sticks I guess. There were these numbers (which I have no idea what the hell they are) and they seem to be different for these two sticks. Now my question is what are these numbers and is it a problem that their numbers don't match? The PC works fine and there are no errors.

www.imgur.com/rUnRbyR,2SFqWNq

[dadasmithywinkle]

@Moopey As long as they work fine, there should be no issues. The reason you see different numbers is because theyre two completely different RAM modules.

[Analog]

That's the cas latency. It's normal to be different if you have RAM modules of different brands and batches.