On Wed, 5 Jun 2002, Vasile Surducan wrote: >Peter, take a good scope and see the +5V on different points on your 1000$ >processor + motherboard. You'll be surprised about what they say and what >you'll see ! Usual a poor PC ( 100Mhz to 450 MHz ) have the noise on the >board exactly as I told you ( in the best case is 500mV ). You know ... PLEASE do look up that PSU comparison on the web. The noise you are seeing is probably 99% switching noise from the circuits. You did use a differential probe to measure the noise, yes ? Of course $10 PSUs do not compete in this game. Peter -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu