Yes i did , i accely did it , when i bought my quad core intel,i sayed to my self , to try toasting my old AMD 3500+ so i took the old motherboard and the graphics and ram memory(they were old type , wouldn't fit on my new cpu) and i had 5 20 centimeters coolers waving air on it i used Silver Termoconducting paste and i got 2,86 gHz i think doh i should mention that i used that procesor for 5 years, and i really used it didn't just played Mario or something like that
edit : oh yeah and i modifiyed the Voltage from Bios the minimum is 1100 the normal 1400 i've put 1550
and it didn't got toasted , after this i took the procesor and washed it and put it like a trophy on my desk :d