Why cant i overclock ram to 1333mhz

[jakepf1]

hi there every time i set ram speed to 1333mhz and reboot it doesn't boot ? it says overclocking failed.
is there any suggestions ? motherboard asus p8h61-mx, cpu g630, strontium hynix 8GB (4GB X 2)

 

[jakepf1]

link the exact RAM.

http://www.ebay.com.au/itm/Strontium-Hynix-8GB-4GB-X-2-DDR3-1333-240PIN-UDIMM-/200637668574?pt=AU_Components&hash=item2eb6efdcde#ht_2614wt_1139