Question : Problem: Memory 2 gig or 4 gig

Just got a new computer:

2.2 ghz duo 2
6800M GT
running Vista Ultimate but will be switching to XP pro

Two questions:

1) Even though I technically can't use 4gb of memory will I see a difference between 2gig and 4gig?  I run photoshop, Illustrator and many other programs all at the same time.

2) I currently have DDR2 PC2-5300 667mhz but I see that I can get DDR2 PC2-6400 800mhz.  Will I see a difference between these two or will they be the same?

Follow up question:  If both 4gig and 800mhz are better then if you had to choose between either what would it be?

Thanks!!!!

Answer : Problem: Memory 2 gig or 4 gig

Having both RAM sticks the same size will enable the Dual Channel to kick in. That will give a noticeable performance boost. The improvement Dual Channel will give  1+1 over 1+2  will bring those 2 configurations very close to the same noticeable speed from what I've noticed, but it's better to run benchmarks yourself if possible. Also running 2 + 2 will only enable 3 to be seen bu the OS, but it will be 3Gigs under Dual Channel, so there will be a great advantage over 1 + 2.

Good luck,

Anthony