This is a typical output screen from this simple DOS command line utility. Protected Mode and Extended Memory Performance Measurement -- 5.00 Copyright (c) Rational Systems, Inc. 1987 - 1993 DOS memory Extended memory CPU performance equivalent to 38.0 MHz 80486 ---------- --------------- 700 16384 K bytes configured (according to BIOS). 640 15360 K bytes physically present (SETUP). 657 23788 K bytes available for DOS/16M programs. 10.2 (4.5) 10.7 (4.0) MB/sec word transfer rate (wait states). 18.8 (5.0) 21.2 (4.0) MB/sec 32-bit transfer rate (wait states). Overall cpu and memory performance (non-floating point) for typical DOS programs is 5.10 ń 0.61 times an 8MHz IBM PC/AT. Protected/Real switch rate = 20932/sec (47 ęsec/switch, 31 up + 16 down), DOS/16M switch mode 0 (DPMI).