How many different FSB are there for the 7140N model?
CREATE TABLE "7100_series_tulsa" (
  "model" text,
  "speed_g_hz" text,
  "l2_cache_mb" real,
  "l3_cache_mb" real,
  "fsb_m_hz" real,
  "tdp_w" real
);
SELECT COUNT("fsb_m_hz") FROM "7100_series_tulsa" WHERE "model"='7140N';