Ram memory

[Artifact]

Hi, I got MSI CR620 with 2GBytes, but want more...
On MSI site I got information that my laptop support max 8GBytes (2 of 4GB) of ram but now what I need to buy? 1333 or 1600? :O I dont really know what 1333 or 1600 mean...
Here is my current specification:
CPU = Intel Celeron P4600
Memory = DDR3 2GB
MotherBoard = MSI CR620

O/S = Windows 7 Home

 

[Yami]

1333MHz and 1600MHz is an aspect of the speed of RAM. The higher it is, the faster it is.

According to the laptop's specification page, it requires 1066MHz DDR3 RAM.

Laptop memory is referred to as both "SO-DIMM" and sometimes just "laptop RAM", so you need to buy 1066MHz DDR3 SO-DIMM.

Here is an example from a UK website:
Corsair Memory 8GB DDR3 SO-DIMM PC3-8500 (1066) Dual Channel Laptop - CM3X8GSDKIT1066 - Scan.co.uk

 

[Artifact]

Thanks but what will be if I put 1333 or 1600?

 

[Yami]

Thanks but what will be if I put 1333 or 1600?

It will probably work fine, and will run as if it were 1066. However, there's a small chance that it might not work at all.