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Since we do not have any of the new "B" core Thoroughbred AMD processors, we could only use data from the Athlon XP2200+. We feel that this would be inadequate and rather concentrate on getting the most performance out of the P4 2.8 and compare the different configurations with each other.

Test Configuration

Essentially, we are comparing three different settings on the same test platform, that is:

• CPU at default speed (2.8 GHz), memory at 4:5 ratio (166 MHz) at 2:2:2:6 1T (CAS:tRCD:tRP:tRAS Leadoff CMD rate)
• CPU at default speed (2.8 GHz), memory at 4:6 ratio (200 MHz) at 2:2:2:6 1T (CAS:tRCD:tRP:tRAS Leadoff CMD rate)
• CPU at 150 MHz FSB for 3.15 GHz, memory at 4:5 ratio (187.5 MHz) at 2:2:2:6 1T (CAS:tRCD:tRP:tRAS Leadoff CMD rate)

Vre was increased to 1.6 V and DDR voltage set to 2.7V to ensure stable operation at 3.149 GHz and 375 MHz DDR data rate at the lowest latencies available on the ASUS P4S533. At those settings, using the stock Intel-provided aluminum cooler, the system did not crash a single time.

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