I've got the Gigabyte GA-MA790XT-UD4P in the mail (to go with a Phenom II X3 720) but am similarly confused about what RAM to get, since the ones Gigabyte suggests for this board range from 1.5V to 1.9V - what's the difference?
The Kingston HyperX memory on that list, for instance, is a 1.9V module. Does this mean I could use ANY 1.9V? I'm interested in 2x 2 GB OCZ DDR3 PC3-12800 Platinum Edition (OCZ3P16004GK), CL7-6-6-24, 1.9V. Will it work?
That RAM is a little high in voltage. The higher the voltage, the more likely you will have to do some tweaking in the BIOS to get it stable. I would recommend thesehttp://www.newegg.com/Product/Product.aspx?Item=N82E16820227293
You should start your own thread though.