Hey all, I have a MacBook - Core 2 Duo 2 GHz - 1 GB Ram. I just bought 2x2gb sticks of 667mhz ddr2 corsair sodimm modules. My macbook is having trouble reading both ram sticks at one time. When I try to boot with one stick, it loads fine. But with both or one of each(2gb and 512mb) It doesn't work. Any ideas?