How to overclock amd phenom ii x6 1055t to 4 ghz

[mandeep148]

Hello,
My system is amd phenom ii x6 1055t
4gb kingston ddr3 Ram
500watt Cooler master
Mobo: Asus M4A78LT-M

I have overclocked upto 3.6ghz
but now i want to overclock cpu to 4 ghz
i have set frequencies but overclocke failed

i have set
286 x 14
7x multiplier
1400mhz ht
cpu voltage 1.42
(i have increase fsb five digits)
So please is there any body to tell me about overclocking failed
so please help me

 

[Ubrales]

http://www.tomshardware.com/forum/258573-29-black-edition-overclock-guide-raising-multiplier

 

[c_h1132]

i have 2 1055t build 1 on a asrock, 1 on a asus board. i cant get any of them over 3.5ghz without being stable. both are on h70 coolers. some can overclock good some cant.