Single Ram Stick ok?

[MoochiMane]

Hey guys,
I made a mistake of buying one stick of 8GB ram, instead of buying the 2x4GB kit.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820233218

This is my first pc build and I'm a bit worried about the one stick causing issues. Should I buy the exact same stick right away, or will it be all right with that?

This is the motherboard I have
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130697

Thanks you guys for the future answers/solutions. Just a worried noob here.

 

[Tradesman1]

Should be fine, it will be running in single channel - dual channel can be up to 10-15% faster, but with 8GB won't notice it alot