I ordered a 15" MBP D) with 4GB of RAM. I also ordered 8GB of RAM to put in it from Newegg. I'm wondering if I can replace the 2GB of RAM in my old Late 2008 15" MBP with the memory from the new computer to increase the old laptop's resale value. It seems to be the same form factor, but the new memory is PC3-10600 DDR3 1333 and the old memory is PC3-8500 DDR3 1066 MHz. Does that affect compatibility? Thanks!