Something

alemao:1$ sysctl hw                                                            
hw.machine=i386
hw.model=AMD Athlon(tm) XP 2600+ ("AuthenticAMD" 686-class, 512KB L2 cache)
hw.ncpu=1
hw.byteorder=1234
hw.physmem=804810752
hw.usermem=804802560
hw.pagesize=4096
hw.disknames=wd0,cd0
hw.diskcount=2
hw.sensors.lm0.temp0=36.00 degC
hw.sensors.lm0.temp1=46.50 degC
hw.sensors.lm0.fan0=2884 RPM
hw.sensors.lm0.volt0=1.66 VDC (VCore)
hw.sensors.lm0.volt1=3.09 VDC (+3.3V)
hw.sensors.lm0.volt2=5.00 VDC (+5V)
hw.sensors.lm0.volt3=12.04 VDC (+12V)
hw.sensors.lm0.volt4=-11.95 VDC (-12V)
hw.sensors.lm0.volt5=-5.15 VDC (-5V)
hw.sensors.lm0.volt6=4.95 VDC (5VSB)
hw.sensors.lm0.volt7=3.55 VDC (VBAT)
hw.cpuspeed=1981
hw.vendor=MSI
hw.product=MS-7021
hw.version=1.0
hw.serialno=00000000
alemao:2$