Is there a software i can use to overclock a Core 2 Quad Q6700 CPU?

You would have to post more info about your motherboard.

If you are looking for addon software to oc the cpu then you won't find any. The overclock solution comes with the motherboard itself.

I don't know if the stock cpu heatsink and fan are adequate to cool the cpu at even a 5% oc. Use a cpu temp monitoring tool. I have tried oc'ing older cpu's with stock cooling and it doesn't work well. If you do get to overclock it you can get an aftermarket cpu heatsink and fan for $25. Coolermaster hyper 212 is a common choice in that price range.

That's a pretty over kill gpu for the q6700 without overclocking.
How much memory do you have?
32 or 64 bit operating system?
What games or software is this for?

What i was looking for would be the model name/number on the motherboard, not the serial number. It is typically the largest text written on the motherboard, relatively visible. Unfortunately it seems you likely have a fairly generic motherboard, one that was mass produced for sale in Best Buy or the like. These types of boards usually don't have good options for overclocking if any at all. So I think you are out of luck for getting an oc going. For $60 you could buy this on ebay and overclock your q6700, assuming you also purchase that cpu heatsink I mentioned before.
http://www.ebay.com/itm/ASUS-P5QL-EPU-Motherboard-P5QL-EPU-Intel-P43-DDR2-LGA-775-I-O-Plate-/261799910564?pt=LH_DefaultDomain_0&hash=item3cf47d9ca4

The following link (written by graysky) is a how to oc your cpu...
http://forums.extremeoverclocking.com/showthread.php?t=261409

It takes a considerable amount of reading and a little bit of risk taking to oc your cpu. It is worth it to know this information and how to do it because you will generally be much more aware when you buy your next system. You can save a LOT of money and produce a much better pc if you put it together yourself. The pre built systems you buy from stores generally suck and you are paying 50% more than what you would get if you put it together yourself. The power source, motherboard, and memory are almost always low budget in the prebuilt systems. This is why you aren't even allowed to overclock them because the components couldn't take the increase in heat/voltage. Building your own system is not hard. Read the Toms Hardware how to build threads and watch several Youtube videos and you will be in business. It would be best to experiment with overclocking when you are a year away from building a new system. If you can't afford to replace your hardware then you probably shouldn't overclock. I didn't take that advice myself and it worked out really well anyway. If you are methodical and slow you will be fine doing some overclocking. Your q6700 likely would overclock to a speed of 3.0ghz with the stock cooler you have (taking this info from what I have read). With an after market cooler you could get to 3.6ghz or maybe 3.8ghz.


All that being said, if you aren't having trouble with the fps in your games then I would say it isn't worth the trouble and money to buy this board and an after market cpu heatsink like the hyper 212. I have a relatively decent pc, not good enough to try Assassins Creed Unity unfortunately, but I don't even oc my cpu and gpu's for gaming. I just leave them at stock speed. It depends on what type of games you are playing. MMO's and RTS are pretty easy to run. First person shooters can be much more intense on the cpu or gpu or both.