Tutorial on how to overclock amd sempron 140

Best you could hope for is around 240 fsb for the cpu, and 1.1.66 for the ram ratio (or try changing the ram setting down, from 800 to 667 or their equivalents). Some ram settings in the bios are half the actual fsb (400 instead of 800), depending on the board bios. Ecs boards rarely have voltage settings to adjust. They aren't designed for serious overclocking.