I use a little Java program in VAJ: long t1 = 0x000171C770E5F16FL; long t2 = 0x000171CBA50E84A6L; int sec = 45; long ts = t2 - t1; int MHz = (int) ((ts)/(sec * 1000000)); System.out.println("Ticks = " + ts + ", seconds = " + sec + ", MHz = " + MHz); For your numbers, I get: Ticks = 18054943543, seconds = 45, MHz = 401 Joe P.S. I have a model 270, but I'm pretty sure my processor feature is 2250. Where did you get the "22A2" value from? I can't find it on any of IBM's spec sheets. I use the following URL tom compare the various features and prices, but there's no model 270 feature 22A2: http://www.iseries.ibm.com/servlet/factFind > From: Norbut, Jim > > 270 with a Processor Feature of 22A2 > > 000171C7 70E5F16F > 000171CB A50E84A6 > > 45 seconds between values > > I have no idea how to do the hex/decimal conversions using the M$ > calculator > So if anyone cares to take a whack at it.....have a blast. > > I would love to hear how slow my "development" system is.