Hi, this is my first time posting here...anyway I put together a new system: i5 2500, asrock z68 extreme3 gen 3 mobo, gskill ddr3 1600 16g (4x4g) and geforce gtx 460....the problem I am having is getting the computer to fire up with all 16g. It will run fine with 8g. Once I get it started with 8 I can shutdown and put all 16, and it is recognized and runs for a little while...the weird part not as well as it does with 8g. Eventually it locks up and I have to drop down to 8g. Is there some bios setting I need to change to be able to run with all 16 or should I send the memory back. Please any help will be appreciated.