Understanding Belarc FSB speed

these guys are close, but they are all wrong.

Your processor speed on the P4 is 800Mhz (quad-pumped, or 4x your system-memory bus). The System-Memory bus on the P4 is 200Mhz.

Your AMD board doesnt have any pumping. Its flat out 200Mhz, as is the memory.

Here is the breakdown between CPU FSB speed, and memory: (memory type depends on chipset implimentation) P4 FSB 400 chips have a system-memory clock speed of 100Mhz (100 x 4 = 400) - works with Rambus, DDR PC2100, or better P4 FSB 533 chips have a system-memory clock speed of 133Mhz (133 x 4 = 533) - works with SDRAM and DDR PC2700 or better P4 FSB 800 chips have a system-memory clock speed of 200Mhz (200 x 4 = 800) - works with DR PC3200 or better

AMD Chip FSB and memory speeds are exactly the same. 100,133,166,200 ... Memory type for DDR is double the bus speed (because its double-data-rate, not the same thing as bus-pumping) 100Mhz = SDRAM, or DDR200 (PC1600) depending on chipset 133Mhz = SDRAM or DDR266 (PC2100) depending on chipset 166Mhz = DDR, DDR333 (PC2700) 200Mhz = DDR, DDR400 (PC3200)

Other chipsets support faster clockrates and faster memory speeds, hence DDR2 (DDR Second Generation) which is beyond the scope of your question.

Both of your systems are setup correctly and belarc is accurate on both accounts.

Hope this helps,

- NuTs