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The Multiplier Legacy Validating the New, Supporting the Old Apples to Apples and Clocks to Clocks System Disclosure, SiSoft Sandra Memory PCMark2002, A Different Perspective Benchmarks that won't: CodeCreatures, Comanche4 SPEC ViewPERF and diminishing returns Fraggin the Quake3 Arena Scores Expendable and the Chipset Frequency, 3DMark2001SE 3DMark2001SE: Behind the Looking Glass Profiling Performance, Will Barton Challenge Hammer? AMD Processor Steals |
| 333 MHz FSB for the Athlon The Unkept Promises | |
| (Review by MS, September 2, 2002) |
PCMark 2002
PCMark2002 is a perfect application for testing the different speed settings since the CPU and HDD scores measured in parallel to the bandwidth provide an internal control for the accuracy of the benchmark as well as the validity of some interpretations that we had earlier, i.e. no real changes in CPU and/ or IDE performance (the latter being dependent among other things on the PCI bus frequency) whereas the memory performance should vary. Unlike the situation in SiSoft Sandra, PCMark2002 includes much more complicated tasks than just scrolling down the column addresses and prefetching the bits from adjacent locations. Therefore, we do not expect the bus saturation that evens out the PC2100 and PC2700 scores courtesy of the FSB bottleneck.
The deck is stacked differently in PCMark than in SiSoft Sandra: increasing the memory bus frequency from 266 to 333 MHz data rate yields an 8% bandwidth increase that is topped by an additional 9.5% increase when the FSB is increased to 333 MHz as well.
It is really important here to stress the fact that only a minority of application uses streaming data transfer mode, the rest are a mixture of random and "interrupted" in page access, where interrupted means that cache accesses may negate in page accesses and / or eventually lead to page expiration.
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