Three things, if you're actually running the memory frequency at DDR3-1600 with any Phenom then you'll need to either increase the FSB -> 240MHz or CPU-NB Frequency -> 2400MHz and manually set the CAS timings, DRAM Voltage and if needed the CPU-NB Voltage. In addition, often using 4xDIMM slots requires a slight DRAM Voltage and sometimes CPU-NB Voltage increase. Lastly, often on AMD I find 4GB/stick densities require a BIOS update to function properly.
Q - What exact set of RAM do you have? ; provide a link
Q - What BIOS version are you running?
I talked to service reps from Kingston, and they said the same things you guys are saying. I need to update my bios, and I'll probably have to overclock if I want to use this RAM. I'm figuring out whether I really want to do that to my cpu or not. Also, installing the new bios is a hassle. You have to do it via flash drive.
Thanks guys. I finally figured out how to flash bios, and was able add the RAM one module at a time (Kingston HyperX Perf. 1600 mhz DDR3) until I got the full 16GB. The BIOS only reads the RAM at 1333 mhz. The only way I'd be able to get the full 1600 mhz speed would be to overclock, but I don't play games, and the speed with the current 1333 is awesome. Thanks for all the input, it was very helpful.