Hello,
P4 1.6GHz 512 ram xp sp3
nvidia geforce4 ti 4200
mach4 idle after start: cpu 75% mem 10,000K then settled to mem 6500K
Running outhouse: cpu 95% mem 16,000K
Mach3 idle after start: cpu 0% mem 44,000K
Mach3 running outhouse cpu 0% mem 57,000K
I too had to exit with TM.
I could view the code and rotate it OK with no lockups
Hope this helps.
Mark