Please be gentle, i'm a noob... I have an early mbp of the 1.83ghz era, and only a gig of ram. 2 of these in fact... Size: 512 MB Type: DDR2 SDRAM Speed: 667 MHz is my understanding of the interweb correct in that i can only go up to 2 gig (2x1sticks)? or am i wrong? (noobie alert) Is all ddr2 sdram the same? Looking on aria i can see 1 gigs for about £15. They dont mention laptop specific, so would they fit? sorry, my knowledge base is getting there....slowly!!