Just built first system..with P5A-B and K-6/266 using recommended settings for each. Bus at 66Mhz and factor of 4. Using system diagnostics CPU is reading at 517Mhz what gives?? I didn't want to smoke the system so I went with Bus at 100Mhz and factor of 3 for just a little overclocking evil. Things got better, CPU core went to 579!!. and during boot-up the sytem reads the CPU as 300Mhz where before it read it right as a 266. Needless to say it's sitting idle until I can 1) cure the problem or 2) cool it . Core voltage is at 2.2v and SDRAM is at 3.3v.