Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many entries have a speed of exactly 2.53 GHz?

### Inputs:
table_name: table, columns: ['model', 'Speed (GHz)', 'L3 Cache (MB)', 'QPI speed (GT/s)', 'DDR3 Clock (MHz)', 'TDP (W)', 'Cores', 'Threads', 'Turbo-Boost']

### Response:
SELECT COUNT Cores FROM table WHERE Speed (GHz) = 2.53