2gb extra in Vista didnt change Rating...?

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I originally had 2gb RAM in my machine, and at first had a rating of 5.0 on the memory:

OcUK 2GB (2x1GB) PC2-6400C5 800MHz DDR2 Dual Channel Kit

OK, fair enough, I thought.. Im running 64bit Vista so bought another 2gb:

OCZ 2GB (2x1GB) PC2-6400C4 Dual Channel Platinum Revision 2 XTC Series DDR2

I kinda expected the rating to go up with the extra 2gb, but no, its still @ 5.0

I have not tweaked the timings for the RAM, so that could be an issue, however you would have thought the extra memory counting for something.

Should it? (and yes, I have rerun the test. )

 

[Scope]

OK,it might be a penis thing, and I was going to get another 2gb anyway, but I was just expecting the extra ram to improve Vista in some way, which I am sure it does, only not the Rating. Never mind.. I still cant believe that the first RAM i bought last year cost me £130 for 2gb, now its £30..