Well the P4S533 1.6A I am working on now I set at 160 FSB and it booted up but after a while it got very unstable, Running at default, The first one I had a 350 watt power supply and had to change it to boot to 160, I went with the Antec 430 true, I think if I build another one for someone I will tell them to go to a 550 but back to the one I am working with now, When it got unstable at 160 I looked and the temp was over 50C and the CPU fan speed was red and running at 1300 RPM's, It has the stock heatsink so I don't know if it is a bad fan or over clocking slows the fan, Could use some help from someone that knows, Like I have said I work mostly on AMD's, The P4S533 looks to be a nice board