After installing Snow Leopard if i go to about this MAC it shows 4GB of Ram DDR2 @ 800 Odd thing is, I have 16GB DDR3 @ 1333 installed in my system. 4x4Gb Sticks. Corsair. 9-9-9-24. Also, ive already tried puting the flag arch=x86_64 under kernel. No change at all. the rest of my specs are in my Sig.