Quote: Originally Posted by heartagram616
budget id say upto £2,500
would overclocking the GPU benefit playing games?
If this is your first attempt at overclocking you don't get a $300.00 motherboard. You'll only give yourself migraines trying to get the board stable given all the options you're completely unfamiliar with. There are many boards which are very overclocking friendly which cost 1/2 the price.
Having said that, to answer your question: yes and no... but mostly no. Yes, in many games OC'ing the core will give you better fps, but there are caveats. Given that you're going to be using a 1366 i7, you're bottleneck will be the GTX 470 in many cases, so overclocking becomes pointless, as no matter how much faster you make the cpu, the gpu will be dancing as fast as it can already.
Please don't take my comments to mean you will not have great game performance; on the contrary, the rig will no doubt spank much you-know-what, big time.