Will these Upgrades Work with my PC?

[FrosTi]

Hi, I'm thinking of doing some upgrades on my Dell Dimension E520
Yes, I know it's pretty old.

Since I'm starting to play Wow pretty soon I want it to run smoothly.

Here's my computer specs and the RAM and Graphics Card.
Also if you think these aren't great or can recommend a better upgrade from a different website please go ahead.

Specs:

http://gyazo.com/5e764fa4fbc4fc5af9c339d9da1a901c


Upgrades:

Graphics Card:
http://www.bestbuy.com/site/Galaxy+-+NVI...cp=2&lp=10


or,
http://www.bestbuy.com/site/VisionTek+-+...cp=1&lp=14



RAM:

http://www.bestbuy.com/site/Memory+Maste...Id=9359892


or of course the Dell Website:

http://accessories.us.dell.com/sna/produ...noteSearch


Please tell me what you think as starting over Christmas break wouldn't be too bad.


Thanks, FrosTi