BIOS reports my 333 bus Athlon is running at 166MHz bus, or Q2. BIOS shows my 800 bus P4 is running at 200MHz bus?
A. AMD’s Socket 462 (Socket A) CPU bus uses Double Data Rate technology, the numbers are inflated by 2x to show data rate rather than clock frequency, because DDR transfers two bits per path per cycle instead of one. A2. Intel processors based on P4 technology use a Quad Data Rate bus, the numbers are inflated by 4x to show data rate rather than clock frequency. QDR transfers four bits per path per cycle instead of one. Q. I just installed an XP1600+ and it shows up as an Athlon 1050MHz (or similar mismatched speed). A. Socket A processors do not have bus speed detection pins as Intel processors do, you must manually change your bus speed in BIOS or by jumper, see your motherboard manual for more information. Q. After changing motherboards my system has problems in Windows. If you have upgraded you motherboard to a new board with a different architecture or chipset you will, at minimum, need to install the appropriate drivers for the chipset. Sometimes you may need to fully reinstall t
