Can somebody help me????

[capcay]

the specification computer i want to build is:
- processor Phenom II x4 955 black edition= not buy yet
- motherboard gigabyte GA-MA790FXT-UD5P=not buy yet
- vgacard HIS 4850 ICEQ 4=already buy
I realy confuse too choose a ram card and a cases , can't somebody give me advice?
i like to player mmorpg like perfect world or world of warcraft
thx before
Nb: - i already have a harddrive
- pioneer dvdrw
- keyboard, mouse. etc

my budget is us$700

 

[yadda]

Try and follow the guides:

http://www.anandtech.com/guides/showdoc.aspx?i=3563