I set up my budget system in April this year. For all this time I've been trying some OC. I'll share the results today.
CPU: AMD Athlon II X3 440, C3 stepping, based on Deneb. Unlocked the L3. Highest OC within 72degrees Celsius-- 250X14 MHz @ 1.2875V, NB 2500 MHz @ 1.1875V, loadline calibration auto. Now running with PhenomMsrTweaker with the following settings: P0-- Multi 14, 1.325V/1.1875V. P1-- Multi 12, 1.175V/1.1875V. P2-- Multi 8, 0.95V/1.1875V. P3-- Multi 4, 0.7875V/1.1875V. HT link 250 MHz. P0 is currently locked from AMD VISION Engine Control Center due to temperature issues, so running at stock speed now.
I know. But well then, should I buy a $20 cooler (hyper tx3, say) for a $68 cpu? had I unlocked a stable 4th core I'd certainly have bought one. The L3 isn't worth much. I'm experimenting with it, though.