Articles :: Project Swiftech Part One, Extreme Overclocking Of the P4 2.4Ghz and MSI GF4 Ti4600 :: Motherboards.org
Doc Overclock · 06-14-2002 · Category:
The Intel CPU scaled very well with lowered temperatures, thus following the rules observed in the integrated circuits industry by which any given IC will benefit from a 2% to 4% frequency increase for every 10C drop in actual operating temperatures. At an operating temperature of ~35 C the CPU ran at 3,000MHz.
At an operating temperature of ~10 C -a 25 C gain, extrapolation shows a theoretical operating frequency gain comprised between 5 and 10%. The actual result was 3,312MHz or a 10% gain once all the limiting factors were eliminated such as RAM and memory heating issues.
Unfortunately, the GPU didn't react in a similar fashion. Voltage starvation is a possible cause for this phenomenon. At this stage of the project, a hardware voltage modification was beyond the scope of the experiment and therefore the GPU was at its maximum potential without alteration of the actual card itself.
Other interesting facts revealed by these tests:
There was a very tight woven dependence between CPU overclocking and memory performance. Using the better OCZ PC3000 seemed to be the best choice for our goals.
There was also a very low tolerance of the GF4's ability to be run at overclocked AGP frequencies. This was a very limiting factor in our overall 3D score results.
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