Netbook memory confusion

[MeatLoaf]

Just got an MSI Wind U135DX netbook. All the documentation, manual, MSI website and even the sticker on the palmrest and the box say it has 1Gb of DDR3 ( soldered to the motherboard ) with a single socket for another 1Gb stick.

However when i open up CPU-Z to check what speed ram to buy im greeted with this



So what do i bilieve? CPU-Z that says its DDR2 or the box and stuff that says DDR3

 

[MeatLoaf]

Well ive added a stick of DDR3 and its showing 2gb now. Odd that the original stuff shows as DDR2