How many entries have a speed of exactly 2.53 GHz?
CREATE TABLE "3500_series_bloomfield" (
  "model" text,
  "speed_g_hz" text,
  "l3_cache_mb" real,
  "qpi_speed_gt_s" text,
  "ddr3_clock_m_hz" real,
  "tdp_w" real,
  "cores" real,
  "threads" real,
  "turbo_boost" text
);
SELECT COUNT("cores") FROM "3500_series_bloomfield" WHERE "speed_g_hz"='2.53';