wow, thats a pretty sweet looking cooler. I'm wondering how it does cuz it's angled and gives air room to breathe.. plus go up pipes to cool. Those are decent temps I guess for only being at 2.4 GHz. but we'll see when you overclock it.
ok, let me explain. some enthusiasts believe that your VID will tell you how well you can overclock and usually they are right with that. Now when you took that picture of Core Temp you had C1E and Speedstep disabled in the BIOS right. if so then ur good. if not then it's wrong. but if you did it right. then 1.2750 is actually a great VID.. and better than I've seen in a while. basically the VID., yours being 1.2750 is the amount of Volts your CPU needs to have in order to run at it's default speed of 2.44 GHz. so yours uses 1.2750 at default. people with a VID of 1.3250 need that many volts to get the same speed of 2.44 GHz. (on the Q6600 anyways.) and when overclocking max voltage is a big part of it. so as you raise your speed, and your volts.. your that much lower 1.2750 vs 1.3250 then he is as you raise.. limit for ur said chip is 1.5v.. I'd stay under that if I was you. and thats only for really high speeds. I've seen people with Q6600's with a VID of 1.3550.. thats no good. thats a bad Overclocker. and I've seen some even as low as 1.2100 and those are great overclockers.
basically overclocking is mostly safe if your careful. understand it, and don't overvolt anything. and importantly keep your Temps down. a stable overclock is only concidered stable if at MAX load, the temps don't go above 65c.
ok, now for a general easy and with your VID, a reachable easily speed. then you can see what you wanna do from here. I just had a freind do this over the phone with your same board and chip and worked fine. and also get a program called Prime95, it's a stability test. you run it to make sure your OC is stable.
Try this to start. with that VID you should make it decently easy.
Go into BIOS, and go to the RAM, and voltage area, or system clocks.
Set the RAM to unlinked.. and manually set it to it's default speed of 800. and make sure it's getting the proper voltage the MFG requires.
So, first set RAM to unlinked and manually set to 800 MHz.
then change the fsb from 1066.. or whatever your Q6600 is running at. and change it to 1333 fsb. I think that will put you at 3.0 GHz. I can't member as I have the Q6700. so from there just change the FSB to 1333, or
i'd set it to 1425, and that will be somewhere around 3.2 GHz and you can probably do that on stock volts.. try boot the PC from there. if that gets a Blue screen that add a few volts.. like 1.40v but all are different.. I'd recommend reading some guides online.. look up 780i and Q6600 and I'm sure you'll find plenty.