2Gb vs 3GB

[sabooya]

On Vista x64
I just bought myself 2Gb of XMS 667 Ram. I have anouther 2 512MB Corsair 667 ram. Now If i put it those 2 512 would it help or hinder me?

 

[Roguestar]

Vista x64? Help.

 

[sabooya]

Vista Ultimate 64bit edition, I just want to know if the extra 2 512 are going to slow me down or speed me up.

 

[Lonyo]

More info would be useful, like what motherboard you have.

 

[sabooya]

I have;
Windows XP Ultimate 64 bit edition.
e6300 conroe OC to 2.5
Gigabyte Ga-945P-S3
2GB XMS 667 memory
1GB (2 512MB) 667 Value select <--- should i use this yes or no?
8800GTS 320MB