Single Quad 2008 Mac Pro RAM advice

[soos]

I have a single Quad core 2008 Mac Pro with 2GB RAM (2x1GB). I am hoping to get more RAM from Crucial. I don't use my Pro for hard core stuff, just Internet, COD4, SecondLife, movies, iPhoto, iTunes etc..

I need to decide whether to get 2x1GB or 2X2GB. The 2x2GB is better value for money but I heard that a 4 matching set ie. 4x1GB would optimize RAM speed. Is this true? Would 4x1GB be faster than 2x1GB + 2x2GB for the applications I use?

Thanks

 

[macest]

Bare Feats has done extensive memory testing with 13 different configurations. Check it out here.