i5/7 K users - do you routinely overclock?

[Colonel J]

I recently finished building my new PC with a i5 2500K and I guess there are plenty of others here with new-ish PCs who are using these CPUs. So just wondering, given that overclocking is so easy on these unlocked K Intels...do you run a constant overclock on yours, and if so how stable is it and does it trouble with you any glitches/crashes compared with running at stock?

My only experiment with overclocking so far has been using the one-click OC Genie thing on my motherboard (MSI P67A GD53) which gave me 4.2 GHz straight off, though from what I've read the chip is no doubt capable of 4.5 GHz or more fairly easily by manual overclocking (yes I know about the bit-tech guide) - I've not got around to fiddling with that yet, though I will soon.

I'm asking because for the week or so I ran at overclock I had occasional hiccups that I don't get at all at stock: Nvidia display drivers would freeze up for a few seconds and then automatically recover from a crash most times when the desktop started up. Also had a couple of instances of locked sound loops (with the rest of the PC running OK) that needed a restart (I've got an Asus Xonar DG soundcard). And a couple of times when my Eclipse 2 USB keyboard went dead, again a restart needed. None of these are big deal particulaly, but enough to make me go back to stock settings for the time being. Right now I'm mostly playing Portal 2, DX:HR and other stuff that easily manages 60FPS at stock and so not demanding enough for an overclock to make any useful difference. But when I get to Arma II, Crysis etc I guess it would be nice to have the free FPS boost all the time, if the PC can stay stable (but not an essential obviously or I would have just spent more on a beefier PC in the first place...)

Not really looking for a detailed tech shake-down here on what all my BIOS settings should be, I can experiment more with that for myself, just wondering if others are easily getting a glitch-free 24-7 overclock on these chips so I know if that's reasonable expectation to aim for? I have an after-market cooler (Arctic Freezer 7) and three decent fans in the case so temperature shouldn't be a problem if I do decide to overclock - my CPU was running at max 47-50c ish in Crysis with a 4.2Ghz overclock.