I mostly build my own CAD workstations, and this is my history. All but one were air-cooled and stable, and all were overclocked on day 1 :
First PC - Pentium 1 100mhz / O'C-ed to 120
Second PC - Celeron 350mhz / O'C-ed to 450
Third: P3 850 - O'C-ed to 1 Ghz
Fourth: Intel Q6600 2.4Ghz / O'C-ed to 3.0Ghz (water cooling)
Current: Intel I7 3960 ??Ghz / O'C-ed to 4.4Ghz
Question is, what are the new chips good for?