Table: rdram_specs
Columns: designation
bus_width_bits
channels
clock_rate_mhz
bandwidth_mb_s

Question: Clock rate (MHz) smaller than 400, and a Bandwidth (MB/s) of 1420 has what channels?
SQL: SELECT "channels" FROM rdram_specs WHERE "clock_rate_mhz" < 400 AND "bandwidth_mb_s" = 1420

Question: Bandwidth (MB/s) smaller than 4800, and a Bus width (bits) smaller than 16 has what highest Clock rate (MHz)?
SQL: SELECT MAX("clock_rate_mhz") FROM rdram_specs WHERE "bandwidth_mb_s" < 4800 AND "bus_width_bits" < 16

Question: Designation of pc800 has which highest Bus width (bits)?
SQL: SELECT MAX("bus_width_bits") FROM rdram_specs WHERE "designation" = 'pc800'