First of all let me give you my computer specs.
MS Windows 7 Home Premium 64-bit
AMD Phenom II X4 955 43 °C
Deneb 45nm Technology
4.0GB Dual-Channel DDR3 @ 668MHz (9-9-9-24)
ASUSTeK Computer INC. M4A78T-E (AM3)
VX924 @ 1280x1024
ATI Radeon HD 3300 Graphics (ASUStek Computer Inc)
As you can see I have 2x2gb DDR3 running at 668mhz. Is this right when they're 1333 and my computer can handle it? Do I have something set wrong somewhere? I'm not very computer savvy, I can install memory and get into bios and peek around so I know how to get around but as for whats what I have no clue and need help!