Hey guys, I have a 15 inch unibody pro from late 2008 (5,1). It's a Core 2 Duo and when I got it I upgraded it to 4 gigs of RAM. Yesterday I ordered a Samsung 830 SSD and plan on replacing my current 5400 rpm HDD and installing a fresh copy of OSX on there. From what I can tell in my system profiler, this computer only supports 3gb SATA, will this still be a big upgrade in speed? Here is the system profiler info. Code: NVidia MCP79 AHCI: Vendor: NVidia Product: MCP79 AHCI Link Speed: 3 Gigabit Negotiated Link Speed: 1.5 Gigabit Description: AHCI Version 1.20 Supported Also, I think I remember reading that 4gb of RAM is the max this computer can support, but I also read that I could get 6 gigs. Which is true? If I can get 6, whats a good set to buy? I'm trying to speed this computer up until there's a new rMBP next year.