1600mhz running @ 1333mhz

I'm sure there are multiple threads with the same question but being pretty "uncomfortable" with bio's settings i'm looking for some specific advice for my setup.

Just built a new build with the following specs for casual gaming and a bit of amature graphic design etc..

Specs:
CPU: AMD Phenom II X4 955
Mobo: GA-870A-UD3 870
RAM: Kingston 4GB (2x2GB) DDR3 1600MHz HyperX Memory Kit CL9(9-9-9-27) 1.7 - 1.9V (KHX1600C9D3K2/4G)
GPU: XFX HD 5770 1GB XXX Edition GDDR5

Basically my RAM is running at 1333mhz and i'd like to get the full potential of 1600mhz if possible. I know there is probably little to no performance upgrade but I paid a fair bit for this ram and would like to get the most out of it.

I don't have many plans to overclock as i'm using a couple of year old Corsair VX550 PSU and i'm not that bothered about reducing component lifespawn or risk frying something (As i'm a noob OC'er) for a relatively small performance upgrade.

Here's some CPU-Z info:



The RAM appears to be running at 9,9,9,24 1.5v when it seems to be 1.7v-1.9v sticks with a default of 9,9,9,27.
The MB is this one http://www.ebuyer.com/product/218937 there's a comment stating the board is revision 2.1 and should take upto 2000mhz but I have no idea how to check the board I received is rev2.1.

Long drawn out question I know and presumably there's no substitue for reading up and getting comfortable with bio's settings as after all i've bought a black edition chip and seems a shame no to try and squeeze 3.8ghz or something out of it.

I can take some pics of the bios settings if that helps.
Any advice appreciated thanks