Saberen :
what is the difference between cpb ratio and cpu clock ratio? and when overclocking do i change the cpb ratio or the cpu clock ratio or do i leave those and change the cpu bus frequency?
One is the CPU block, that can be in amounts of 100Mhz, 125Mhz, 150MHz and so on. A CPU running at 3Ghz can have a multiplier of x30 using 100MHz blocks
CPU clock ratio would be the multiplier of those blocks. e.g CPU running at 3.5GHz stock with a a ratio of x35, overclocking it to 4Ghz would require increasing the multiplier to x40 (using the 100Mhz blocks)
You can also overclock by increasing the block's frequency without increasing the CPU ratio.