I´m considering upgrading the ram on my Macbook Aluminum Unibody, first edition from october 2008. OSX tells me it uses "2gb 1067 MHz DDR3" ram. So I need DDR3, but will this work: Kingston DDR3 HyperX 1600MHz 8GB Kit w/2X HyperX 4GB DDR3, CL9-9-9-27 Is this something I can put in my machine? Despite being 1600MHz? Or does it need to have the same ammount of MHz as the default ram that came with the Macbook? There are only two slots for RAM right? So I need to take the old ones out anyway?