Hello qafdemo,
Unless you have a dual-core computer, one of your computers is a hyperthreading Pentium 4 that can run 2 threads at the same time. This takes twice as much memory to hold 2 threads without a lot of swapping. It does not run twice as fast because there is only one FPU (Floating Point Unit) in a Pentium 4. If you want to run 1 thread (which will run faster) then go to My Grid - Device Manager - Device Profiles and edit your BOINC profile so that it says 'On multiprocessors, at most use: 1 processsors'. It detects the hyperthreading capability of the Pentium 4 and thinks that it is a multiprocessor capable of running 2 instances of the BOINC application. Windows Task Manager says that a Pentium 4 running only 1 thread is running at 50% efficiency, but it is really much faster than that.

Lawrence

Hi qafdemo.
You can go into the BIOS and switch hyperthreading off there. If your computer is used almost exclusively for Boinc and you only wish to use one thread then this is for you.
There is an age old arguement about hyperthreading, using one or two threads for working, and at the risk of potentially ugly consequences, my personal experience has been that two threads give me an overall performance advantage of 20-25%. There I've said it!!

Although 1 Thread night take 6.5 Hours, for example, and two threads say 10.5 hours. This means that a single thread takes 13 hours to produce two units of work where two threads will take only 10.5 hours to do the same two units. i.e. 2.5 Hours faster overall. This is my experience with my machine, yours may be different.

Cheers. ozylynx