Help with Overclocking

[EBulb]

IM trying to overclock my Pentium dual core 940.. I up the frequency in BIOS but when i boot into windows in system properties it says one cpu is 3.2 the other is 3.74.. I upped to 233 for the first attempt and it hasnt missed a beat.. But how do i get both cores overclocked ?

 

[EBulb]

Cool, i see both as 3.74 in CPU-Z.. i have kept pushing the bus speed up to the point of the cpu @ 4 gig and its not too bad.. It has hung a few times though, but im wondering what is an acceptible level of voltage increase ? I think if i increase voltage maybe it will be more stable ? The default is 1.3 what would be the most i could push it to ? Also what would you say is an ok temperature for this CPU ?

One other thing im wondering... I have 2 gig of ram across 2x1 gig sticks, i put them both in the same coloured slots on the mobo, so what is the speed increase this gives me exactly ? The salesman said 2 sticks would be faster but im curious as to what he meant.. Also do i need to do anything in the bios or just put them in the same coloured slots and thats it ?