I just dropped 4 gigs of OWC RAM into my Santa Rosa 2.4 Core 2 Duo 17" MBP with NVIDIA 256 Vram and a 7200 RPM 160 gig Drive (with 100 gigs free). Tiger 10.4.11 IT IS RUNNING SLOWER. I SWEAR!!! I ran disk utility and fixed permissions (3 times). Trashed the cashe and cookies. I restarted it, too (twice) I know that RAM doesn't always make a computer faster (i.e. unless you are running several applications at once). But you would think it would help opening GarageBand files and sampling loops while playing back a 5 track song. I even got a rainbow when I looked up applications in the "About this Mac"