Which is more faster for a dell E510. (4 x 1G sticks or 2x2g sticks)

[Shpati]

I am about to upgrade and replace my old dell e510 RAM with 4Giggs. However, I do not know which will be faster. Will having 4 of 1G sticks or having 2 of 2G sticks. Which one is faster? Also if you guys can tell me the best brand I should get. I was thinking Kingston and buying it from newegg.com .

 

[Proximon]

See the other thread.