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

### Instruction:
What i/o buses are associated with the brand name Core i3-21xxt?

### Inputs:
table_name: table, columns: ['Codename (main article)', 'Brand name (list)', 'Cores', 'L3 Cache', 'Socket', 'TDP', 'I/O Bus']

### Response:
SELECT I/O Bus FROM table WHERE Brand name (list) = Core i3-21xxT