Weird number on my RAM sticks.

[quasimodo]

I got a laptop custom made from pcspecialist.co.uk in February with Samsung memory with the product ID of M471B5773DH0-CH9.

lshw shows this information under memory:

id:
bank:2
description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
product: M471B5773DH0-CH9
vendor: Samsung
physical id: 2
serial: B235880C
slot: ChannelB-DIMM0
size: 2GiB
width: 64 bits
clock: 1333MHz (0.8ns)

Problem is, I flipped open the back plate and the ram had the following printed on it:

"M471B5773DH0-CH9 1148"

I am unsure as to what the 1148 means. There are modules with the same product number on eBay with "M471B5773DH0-CH9 1105".

Does anyone know what the number means? and will the laptop work if I insert a 1105 stick?

 

[psaus]

The last 4 digits physically printed on the module are manufacturing-process references. Essentially date/time/mfg-plant stamps. Everything before those 4 numbers is what's important to you.

While there is no 100% guarantee these two modules will play nicely together, you should take comfort in it's the best possible match. Everything about those modules is identical, just one was made a few days/weeks/months earlier than the other. But everything else is identical, all the way down to the DRAM die.
I'd buy it if I were looking for an upgrade. (just make sure you do in fact have another slot for this new module.)