My overclocking habit goes back to the old Pentiums and the AMD K5...moving jumpers around to bump the bus speed and multiplier, good times. I do wish I could have gotten that P4 to do more than POST at that speed. I think it could have been stable enough to get a CPU-Z validation but like I said the board gave up on me. I was working that Corsair RAM for all it was worth too lol
I love trying to get old hardware to do things it was never meant to do. I got an old P4 Northwoods 2.4GHz chip over 4GHz with a TEC/water cooling bench setup before the board quit on me, I was going for the HWBOT.org record for that CPU but fell short. I run an old Phenom 2/280x as my main system and I have a Phenom 9850/6950 system in the garage with a mild overclock on the CPU and GPU...someday I'll upgrade the main rig to an FX 8 core and send the Phenom 2 to the garage.
For anyone counting, that's 4GHz out of a 2.7GHz CPU - a 48% increase. GPU is actually a 280x (shows up as a 7970 for obvious reasons), I've actually increased that to 1150MHz, that's on top of the 1080MHz OC provided by XFX - a total of 35% over the official core speed of 850MHz. H100i on the CPU and H55 on the GPU with Ceramique paste. The temp shown isn't right though, the CPU idles about 4-7 degrees above system temp and never exceeds 60 degrees C under load.
My old Phenom 2 x6 is looking for a new friend...this would do the trick.