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DDR333 Memory For 166 MHz FSB

Clash Of The OC'd Titans: Athlon XP 2300+ vs. Pentium 4/3000
By
Processor PCI Clock AGP Clock Bus Clock
Athlon XP 2300+ 38,5 MHz 76,9 MHz 155 MHz
Athlon XP 2200+ 37,2 MHz 74,4 MHz 150 MHz
Athlon XP 2100+ 34,5 MHz 68,9 MHz 139 MHz
Athlon XP 2000+ 33 MHz 66 MHz 133 MHz
Athlon XP 1900+ 33 MHz 66 MHz 133 MHz
Athlon XP 1800+ 33 MHz 66 MHz 133 MHz
Athlon XP 1700+ 33 MHz 66 MHz 133 MHz
Athlon XP 1600+ 33 MHz 66 MHz 133 MHz
Athlon XP 1500+ 33 MHz 66 MHz 133 MHz
Athlon 1400 33 MHz 66 MHz 133 MHz
Athlon 900 33 MHz 66 MHz 100 MHz

In order to operate the Athlon XP at a maximum clock speed of 1866 MHz, we increased the Front Side Bus and memory speed to 155 MHz (12.0 x 155 MHz = 1866 MHz). Such a clock speed is not possible with normal DDR SDRAM modules (PC2100 or DDR266). For this reason, we used the fastest DDR333 module, which is suited to running at 166 MHz. In the near future, new memory modules that run up to 266 MHz (DDR400 and DDRII/533) will be available. According to the SiS roadmap, the corresponding chipsets should begin to make their appearances starting in July or December of this year.

Memory modules compared (from top to bottom): DDR333, DDR266 and RDRAM with PC800.
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