Question about 'Designed for Intel P67 motherboard' and LGA1366 mobos

The reason why I opted to get new RAMs is because I am a heavy multitasker (have 3 screens too) and theres a handful of times I get a LOW MEMORY message in Windows 7.

And yes I am currently using 1333mhz RAMs (Kingston Value Ram 3x2gb at Tri channel) I wanted to get an 1866mhz RAM coz i was planning to overclock my i7 920 D0 to like 4.0ghz.