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Something that we found is that (over a network especially) the display speed could be a problem. We recently installed a dual processor opteron machine, with redhat ent. 4.0. I had the machine installed in our university's "Center for Computational Research" (CCR) (I figured they wouldn't even notice maintaining another machine ;) ). Any rate, the originally performance was miserable, and had CPU utilization of only 4-5%, for the SPM coregistration routine. We were able to deduce that the culprit was displaying over the network. Where I'm located should be 100 Mbit but often we're only about 10-20Mbit. We considered commenting out most of the display code in some of the routines, but I was in a mood and pushed for finding a better solution. The CCR folks tried running a vncserver on the SPM machine, I installed tightvnc client on my machine. The performance increase for running the SPM coregistration routine was about 20 fold. I now connect to the new machine using vnc for all of the programs we use on this machine. Everything runs much much better, and vnc offers a lot of other nice features as well. Something that you might consider is running one of the bench mark routines and seeing if any particular area stands out. In my case, originally the graphics benchmark was way out of line with machines of similar processing power. dave Brambati, Simona wrote: > Dear SPMers, > > I'm using a Precision Worstation 3.6GHz and 3.0 GB of RAM (DDR). The > Hard Drive is 140GB with 10GB remaining. Hyper-Threading is on. The > system is Microsoft Windows XP. > > When I run an estimation, I run into a very noticeable problem, > specifically on the second part of the analysis. The Processor/CPU > usage hangs at 50% and does not want to use anymore processor. I've > run the exact same analysis on a different and less powerful machine, > and the second stage not only shows quicker processing, but the CPU > usage works 90%-100%. > > What can I do to get my machine to work closer to 90-100% on the > analysis? > > Thanks, > > Regards, > > Simona Brambati > > >