Author: Andreas Stabel
Date: 07:35:40 11/18/03
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On November 18, 2003 at 09:51:29, Robert Hyatt wrote: >On November 18, 2003 at 09:17:09, Andreas Stabel wrote: > >>I've got a strange problem with my computer. >>I'm running a 3GHz machine with 1GB memory and Windows XP Professional. >>The machine is hyperthreaded, but my versions of Crafty and Ruffian are >>single threaded. >> >>When I start analysis the machine runs with full speed, but already after >>ca. 4-5 mins. it is running with the speed of a 2GHz machine and it is >>still slowing down. >> >>I also noticed that it runs the same programs with big variations in speed. >>I've tried stopping all other programs and turning off virus checking, but >>nothing seems to help. >> >>I've upgraded from XP Home to XP Professional - I don't know if that is >>releveant. >> >>Anybody got an idea how to help fix my problem ? >> >>Best regards >>Andreas Stabel > > >If you disable hyper-threading, do you still see this? SMT can make the >CPU appear slower, because it makes it look like two CPUs. The sum total >of the computing power of both logical CPUs is greater than a single physical >CPU. But one of those logical CPUs will certainly appear slower than the real >CPU... Thank you for the tip, but I don't think it is a hyperthreading problem. The thing is that the computer runs slower than a single-cpu (no hyperthreading) 2 GHz machine. I've also compared with another computer of the same kind, which run with normal speed, so there is something wrong with my computer. Best regards Andreas Stabel
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