How to get 1866 out of F3-14900CL9D-8GBSR

[Altered]

Processor: Intel Core i5-2500K Sandy Bridge
Motherboard: Biostar TP67B+ Ver. 6.0
Memory: G.SKILL Ripjaws Series 8GB (2 x 4GB)[ SNIPER ] F3-14900CL9D-8GBSR

The problem: I want to run it at 1866 but XPM only shows 1778. The board details claim "It supports 2 or 4 DIMM Slots DDR3 memory that features data transfer rates of DDR3 2000(O.C.)/1800(O.C.)/1600/1333." How would I manually set this since I assume it must be done manually.

Thanks

[Altered]

Nevermind I found it. guess I was just tired last night.

Thanks

[Tradesman]

Glad to hear it, saves me an explanation