first rule of overclocking...if your system is not stable...undo all your OCing and use it for awhile..
Feeling confident I then turned it up to 1066 and increased the voltage to 2.1 and decided to test that.
make sure its stable...THEN increase one thing at a time...use it for awhile and make sure its stable before attempting the next step...and use the smallest increase of voltage possible when you do increase it
you also have to be prepared to replace components that you can kill while learning where the top is for your system...
it will also take you about a week to figure out where the top is for your particular set up..
its not for the feint of heart or those with thin wallets...you also need to be methodical and patient
check your mobo manual to see which slots your ram belongs in and if you can only use 1 stick which slot it belongs in...try booting then