I have a Gigabyte GA-990XA-UD3 mobo with AMD FX-4100 chip. I bought a Patriot memory kit. http://patriotmemory.com/products/detailp.jsp?prodline=5&catid=34&prodgroupid=210&id=1075&type=1 It is a 1,65v 1600. My motherboard only registers it at 1333.I have changed the voltage and that stays put at 1.65v, but when I tried changing the BIOS settings to 1600 it just resets and tells me that I also have to change other settings in order to achieve that. Can someone tell me what I need to change? I know it's not necessary, since the system seems to run fine as it is. I am just a stickler like that. Thanks.