grimx133

Correct, 12 is your multiplier. The CPU Frequency that you changed from 200 to 220 is your bus speed. The fsb is the bus speed times 4, referred to as quad pumped. So, your front side bus is at 880Mhz. when the bus is at 220. And the bus times the multiplier is your speed, 220 x 12 = 2600Mhz. You shouldn't have to change your vcore (cpu voltage) with only a 20Mhz overclock. Auto should handle it for a lot more than that. Your power supply is rather weak, overclocking increases the demand for power, and depending on how much of an OC, it can be a very large increase.

When stress testing, use something like orthos or prime95, they will run your cpu at 100%. Watch your temps as you do so, if they get much over 60C. then stop the test. Take digital pictures of all the bios settings on the jumperfree settings page. You'll have to scroll down to get the entries towards the bottom. Attach them to your next post and I'll take a look and see if anything stands out. You should be able to go a lot more that 20Mhz.
Not sure if I have any notes from overclocking an E4600, but may have some lying around, will look in a couple places for them.