RAM support on motherboard

Okay so I'm about to buy parts for my first ever gaming PC and I've run into one slight problem
I was going to buy a Giga-byte mother board specifically:
http://www.gigabyte.com/products/product-page.aspx?pid=4146&m=n
And some corsair vengeance 4GB x2 1866 MHz RAM. But my motherboard only supports 1600 MHz so what do I do? Because I can't find any gaming ram that is 1600 in my local market. Please help me out.
Thanks in advance!

Just use the 1866. It will automatically clock to 1600. You can "overclock" the ram to 1866 (go into EFI/BIOS and manually set RAM speed to 1866).

Thanks for the reply!! I'll do just that, by the way do you think I cheaped out on the mobo or is it good enough?? 

Hello, I've got similar question, so I didn't want to create another post.

Does MSI Z77A-GD65 motherboard support dual channel dd3-2400? I'll be using  i7-3770K processor.

you can get the vengence but it will down clock it, what id do is buy some g-skill ripjaws at 1333 and overclock it too 1600 and if something ever goes wrong with the ram in the system, with the ripjaws its life time warranty so you will be covered

It's good enough, but you definitely cheaped out. It's a solid motherboard, but don't expect to overclock the CPU. Actually, I don't think it supports RAM overclocking either. I might be wrong, but I know the H67 chipset didn't support overclocking but it allowed iGPU usage, and P67 was the otherway around. I'm not sure if that's still the case with H77.

It does. Most all motherboards with two or more DIMM slots supports dual-channel memory, and spec sheet says it does support DDR3-2400 via overclocking.