maybe you can try this:

core speed: 240 x 14.5 = 3480MHz
cpu NB speed: 240 x 8 = 1920MHz
HT link speed: 240 x 8 = 1920MHz
DRAM speed: 240 x 2.67 = 640MHz (i assume you are using the RAM in your signature = 2GB DDR3 1333)

but i m not sure about the vcore needed.

hmm.. really not sure about the voltage.
i think 1.5v is a bit high for amd cpu, maybe you can start with 1.45v.

here is an article about the overclocking of the amd athlon ii x3 435:
http://www.tomshardware.com/reviews/athlon-ii-x3,2452-4.html

in this article, the cpu is overclock to 260 x 14.5 = 3770MHz, with vcore = 1.440v.

is this applicable for let say AMD Phenom II X4 965 BE 3.4ghz?

3400 x 2 / 3.15 = 2159MHz

but AMD Phenom II X4 965 stock NB speed is 2000MHz only right?

why cpu overclock so little?
i think stock vcore should be able to let the cpu run at 3.14GHz.
and are you sure you want to clock your DDR3 1333 ram to 785MHz?

and what is your cpu NB speed?