2gig DDR2 533/667mhz or 4gigs

aSume11

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Jul 27, 2008
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Intel dg965wh mobo, Intel core 2 duo 2.0 e4400 800mhz cpu, Sapphire ATI RADEON 2600XT 256mb DDR4 and 600+watt PowSupply and Windows XP pro.

I am wonder which Memory setup gets things going... 2gigs of KINGSTON 533 DDR2 or SAMSUNG 667 DDR2 or is using the 4gigs of either the 533/667 DDR2 memory a better choice I am sorta new to memory tweaks of how to use it... and I see people saying XP or VISTA likes 2gig or 4gig and memory not being used or bottlenecking haha if thats what its called... THANKS.