2500 SX/25 (250-1610) SPEEDSX Faxback Doc. # 1135 Your CPU supports two CPU clock speed settings, fast (25MHz) and slow (8MHz). Use the SpeedSX utility to choose either setting.Fast is the default setting. To select the slow speed, type speedSX slow and press at the MS-DOS prompt. The CPU speed changes immediately and remains in effect until you reset or turn off the computer. SPEEDSX does not change the default speed setting stored in CMOS memory. Use the setup utility to change the setting in CMOS memory.