Im trying to upgrade from 1GB to 2Gb ram. I have a dell e521 with 1GB (512 x 2) and i believe it is DDR2 PC4200, or PC5300 but im not sure which. Also I was looking at newegg and they have alot of ram options there. I was looking at a Corsair 1GB, 512x 2 PC 5300 667mhz without heat spreaders for around $85, anyone have any experience with corsair or could tell me if my current comp ram has heat spreaders and if I need them? -thx