Alright, I'll see what I can pull off then. They all have stock cooling, so not sure if I can coax much speed out of them clockwise, but I can throw a 120mm fan overtop at least.
And for "daily" ones, mostly just my servers which I'd rather not tinker with stability-wise. My desktop's 6850k is mildly OC'd to 4.2GHz, so I guess I can do a couple things on it to just help a little bit.