Just a bit more data running "openssl speed md5": 270 MHz U5, running 64 bit: md5 1845.06k 7914.80k 12452.42k 14580.08k 22618.49k same machine, running 32bit with -mcpu=v8 -mtune=ultrasparc: md5 2408.08k 10924.68k 18791.78k 23080.60k 24688.58k Martin