Ok.
Find the section in your BIOS that is for overclocking. I'm assuming its either standard CMOS settings or Advanced BIOS features. Enter your VID of 1.30v here (will no doubt be set to auto). Then find the section of RAM/Vdimm voltage and set that to 1.9v. If you can find out the timings of your RAM, enter them also. This way, everything you've done thus far is just adjusting the values that need adjusting for overclocking.
Then increase the FSB from 266 to say 271 (just a small increment for the first time). You should be able to then load up CPU-Z and you should see a clock speed of 2439mhz. Actually, it may be lower if you have C1E and Speedstep still enabled (reduces the CPU voltage/clock speed automatically based on workload). However, load up prime95 and run one of the tests and you should see the clock speed is just over the default of 2400mhz.
If you go across to the memory tab, it may also be a tad over the default of 400mhz (800mhz as rated by manufacturer is double-data rate), as the FSB and memory speeds are linked together. Your RAM will be ok until around 420mhz or so i assume, but ideally you want to use a different CPU-RAM ratio so the memory isnt overclocked whilst you are overclocking the CPU. You should find the ratios also in the BIOS settings. There should always be a ratio that keeps it under 400mhz for the duration of the CPU overclock.
The CPU multiplier is what is used to multiply the FSB frequency. On the Q6600, it defaults to 9x266 which gives 2400mhz. When you reach a point of say 3.0ghz, you'll need an FSB of 333. On the Q6600, the multiplier can be dropped to 8x,7x,6x should you prefer to have a higher FSB number over a higher ratio, but most motherboards have FSB limits, so i'd say just stick to 9x for now. Its what most people use.
Remember to keep checking the temperatures of your CPU using coretemp and realtemp, and running the tests of Prime95. If you get any errors, the program shuts down prime to that core immediatly. This is a cue that the overclock isnt stable. You'll want to first check: memory speed isnt over the speed of 400mhz and has the correct amount of voltage as instructed. Then you'll most likely want the most common source of the problem, which is more CPU voltage. I'd suggest notching up a single increment using the '+' key on your keyboard, saving, restarting and trying prime again.
For 3.0ghz (333fsb) i doubt you'll need any more than 1.40v on the CPU. My q6600 at 1.3250v VID needs under 1.40v so you should be ok at around 1.3750v i imagine, maybe less. The other important factor is the northbridge voltage, which i believe is called MCH voltage on your motherboard. At the moment it looks like auto (if thats what youve got it on) has set it to a reasonable 1.25v. Personally, i use 1.30v at 3.0ghz, but this is with four sticks of RAM which adds extra strain to the northbridge. I would advise keeping within <1.375v for the northbridge, as i doubt you'll need to go any higher unless you really are going for a big overclock (ie 3.4ghz+)
The only part that is slightly worrying is your temps in that image. They look to be at 50deg. Is that when the computer is idle or under load? If it is idle then you can forget overclocking!
