Help me choose my Memory for my first build

[tjlmbklr]

I have most of what I need to get my system running. I bought a i5-750/Gigabyte GA-P55-UD3R Motherboard combo. I have a 1Tb Seagate HDD (for starters). A 750 Watt Ultra Power supply. A comparable Asus EAH 4650 Radeon 1GB DDR2 graphics card. This card should be good enough for what I need (I hope).

This will be mostly used as a media PC. Some video/graphic editing and lots of web browsing. OC-ing may be something I want to look into in the future but will be happy to finally just turn it on.

Only really things left are a optical drive, OS (which I have Windows 7 Ulimate 64 bit), and the most important; Memory.

So this begs the question what is good memory to run in this system. I have the oportunity to buy a Triple Channel 6gb Consair 1600 for cheap from a friend They are basically new. I know my MB is a a dual channel set up but am not sure if I can buy this memory and only use 4Gb (2 sticks as apposed to 3).

All opinions will be considered.

Thanks in advance.

TJ

[jdeb]

here is the qualified list for the memory

http://www.gigabyte.us/FileList/Memo...a-p55-ud3r.pdf