greenape147 writes: "BurnOutPC has this review of a tachometer modification for your PC. The tachometer, made and sold by Xoxide, works via the serial port and displays the CPU utilization in RPM's! The classical look of this external tachometer is really nice to see after the "window phase" everyone seems to be going through. Not to mention the fact that analog meters are so fun to watch. Currently supported in Windows NT/2000/XP, a GNU/Linux driver is in the works."