Hello, I'm facing a really weird problem with my mac mini unibody. I tried upgrading the RAMs from 2x1gb to 2x4gb. I tried the Kingston's 2x4GBs and the mini didnt boot it just kept beeping so I replaced 1 chip with my old RAM and the mini worked fine and it showed that I have 5GB. That also happened when I switched the other new 4GB RAM back in with an old 1gb..!! Here's the details that came with the RAMS Memory Kit: 2x 4GB Module Pin count: 204-pin Memory Herartion: DDR3 Module Speed: PC3-8500, DDR3-1066 MHz of Module: 1066MHz Latency of Module: CL7 KTA-MB1066K2/8GB DIMM TYPE: Sodim, Do-Dimm, Small Outline DIMM Any Help?