I do hope he (Mike) can get past the +16% overclock that he is getting on the Asus board he is using now.
Still, don't think airflow is the solution to every PC problem.
- Intel Conroe isn't likely to
- Via C3/C7/etc certainly doesn't benefit from it
- AMD Geode LX that launches recently doesn't either
- Sun Microsystems UltraSPARC don't
A good firm copper heatsink, with a thermal pad or some grease, large surface area to contact ratio (for heatsink), heatpipes,
maybe motor oil to said heatsink (enclosed), with some airflow over it (1 x 120 mm at mid rpm is heaps).... and you should be getting near water cooling overclocks.
I know a guy with 7 case fans, and he damaged his PC by hitting the rails on the PSU to hard, just because someone told him 60C was 'too hot'. The Pentium 4 PreScotts will run at 70C happily for quite some time, any hotter than 72C - 74C and they'll throttle down for sure. (Still we are talking Athlon 64 / Opteron rigs here anyway, which require only good passive chipset cooling, similar to above, and not anywhere near 100 Cubic Feet per Minute, CFM, of airflow)
Still, it may just be that the PCI bus is not locked at 33.33MHz and trying to run at 38.66 MHz on his current board, and that is holding him back.
Also many Opterons processors won't clock past 2.4 GHz when overclocking almost regardless of what you do, some will not even reach 2.4 GHz it without issues, the ones that do usually become faster chips.
The AMD Athlon 64FX line was made for that purpose, and they are already clocked fairly high as is.
Overclocking in the future, on multi socket systems will be even harder, as if just 1 CPU can't handle the desired clock speed, you'll hit a wall, even if every other processor will clock higher.
It is part luck, part skill, part technical knowledge, etc
- A given chipset on board X might be good or bad for overclocking
- A given CPU might not OC so well
- Default setting on board A might lock PCI bus at 33.33 MHz, on another it might use the ratios
- etc
What CPU is Mad Mod Mike running anyway ?
The forums are to help each other, and discuss technical stuff, the guy is an (in)famous as Ned Kelly was down 'ere