Hi, I have a very old computer and if I am to say so myself its a piece of crap. Motherboard is ASUSTeK Computer INC. P5KPL and it says BIOS Version: American Megatrends Inc. 0314 , 9/11/2007. Ok so I am trying to upgrade my ram and have tried to mix 2 different types of ram with 4 slots i have tried many things here are some examples: 2 of the same type together works! 2 of different types works! but when i try to put them all in at the same type my pc wont boot but i have figured out my problem but I cannot fix it because I don't see any option to change my DRAM Voltage which is what I need to do.