this is a very basic explanation of overclocking
its basic maths. your Q6600 is rated at 1066mhz. you always divide this number by 4 so 1066/4= 266, this is your fsb. (or cpu frequency)
then your processor (cpu) has a multiplier of 9 (or cpu ratio)
so 266 x 9 = 2394mhz or 2.4GHz, your stock speed
unlink your ram, so it stays at stock speeds, you can overclock the ram later.
this means leave it at 800mhz
can you raise the fsb? yours is now 266. (266 x 9 = 2394mb or 2.4ghz ) try rising it to 280
boot into windows
download realtemp and coretemp (google them)
install and run them
then download intel burn test (ibt) and run it.
have a look in task manager and notice how much free ram is listed.
in ibt set threads to 4 (for 4 cores) and then click on custom ram and enter an amount just below the free amount.
eg. i have 2520mb free ram. so i enter 2500 into the custom ram.
run the test for 5 passes. for now,
and then at final speed you want, run for 50 passes
keep an eye on temps (do not let it go over 75.c)
or download prime95 and run the torture test/large fft's
if test runs fine, go back into bios, and change frequency (fsb) to 300 and repeat the tests.
keep doing this in 20mhz steps until windows will not boot. then just go back a step (remove 20 from the fsb) to the last stable frequency,
just raise the cpu voltage a couple of levels. it should now boot.
its a balancing act, higher voltages will get you higher fsb, but it will also give you higher temps.
my B3 revision Q6600 needs 1.39v in the bios to get to 3.3ghz.
if yours is a G0 revision, you should be able to get this speed at a lower voltage
the trick is to do this step by step, and not go straight to eg. 400 (400 x 9= 3.6ghz), just take your time.
also for some reason using the x 9 multi, i couldn't get past 3.0ghz
so i dropped it to a x8 multi and i got it to 3.3ghz easily.
get the cpu maxed before increasing the ram speed
if you get to 400 x 9 (3.6ghz)
regarding the 1:1
if your fsb is 400mhz and your ram is 800mhz (which it is, yours is pc 6400, and as its ddr2 ram its 400mhz x 2 = 800mhz) this means they are the same, thus 1:1
this is more in the region of ram overclocking.
on my mobo my ratio is 5:6, my fsb is 424 and my ram is 509mhz (so 509 x 2 = 1118mhz and its stock speed is the same speed as yours ;-))
so your fsb is now 266mhz, so if your ram is at 1:1 then your ram is also 266mhz (ddr2 is 266 x 2 = 533mhz) so your ram is underclocked
to get it at 1;1 you would need a 400fsb
if you are at 2.76ghz, that means you will have fsb of 306mhz as 306 x 9 = 2760mhz
if you ram is at 1:1, then your ram will be at 612mhz (306 x 2)
yours is at 767 so you are using a different ratio, i think 5:6, cpu-z will tell you this
your ram is rated at 800mhz so you have actually underclocked your ram Edited by j.col - 5/4/11 at 12:23pm