I have just updated my Mac Pro Dual-Core 2.8ghz to have 16gb of memory. I now have 8 x 2GB sticks in each slot. For some reason or another, the computer is only seeing 10GB of ram rather than the 16gb total. I've double checked to make sure each stick is inserted correctly, and even went as far as rearranging the sticks in a different order to make sure there wasn't a dead stick. I went into the system profile and see that two separate sticks are only showing 1gb rather than the 2gb installed. I've refreshed/reset the PRAM and really can't think of anything else to try. Any Mac genius out there know what the issue could possibly be? Thanks for any help.