q6600 stable at 2.97 but not at 3.0

[bhuvanesh123]

i run my q6600 at 2.7 for about 2 months. its fine. if overclock my cpu at 3.0, after playing crysis for 30 mins, it crashes. but at 2.97 ghz, its stable at default voltage. funny. so wat must i do?? even my ram is 667 mhz when i oc at 3.0 i clock my ram 800 mhz. even normally its clocked at 800mhz, running for a month. help me plz, is there any problem with my CPU??

ALSO REMEMBER, I M NOOB IN OVERCLOCKING, plzzzzzzzz be explanative.

 

[gosefroba]

u have to raise the voltage