CREATE TABLE table_269920_17 (qpi_speed__gt_s_ VARCHAR, model VARCHAR)

How many models numbered L5506 have a QPI speed?
SELECT COUNT(qpi_speed__gt_s_) FROM table_269920_17 WHERE model = "L5506"
SELECT COUNT("qpi_speed__gt_s_") FROM "table_269920_17" WHERE "L5506" = "model"