Table: intel_dx4_specs_2
Columns: processor_speed_mhz
input_clock_mhz
voltage_center_v
voltage_range_v
part_number
clock_multiplier
s_spec_number

Question: Which Voltage Center (V) has an S-Spec Number of sk096?
SQL: SELECT "voltage_center_v" FROM intel_dx4_specs_2 WHERE "s_spec_number" = 'sk096'

Question: Which Voltage Center (V) has an Input Clock (MHz) of 25 x 3, and a Part Number of a80486dx4-75?
SQL: SELECT "voltage_center_v" FROM intel_dx4_specs_2 WHERE "input_clock_mhz" = '25 x 3' AND "part_number" = 'a80486dx4-75'