user: Question: How many values for bus width have a bandwidth of 25.6 and model number of Granville Pro?
Columns: ['Model', 'Launch', 'Model Number', 'Code name', 'Fab ( nm )', 'Bus interface', 'Memory ( MiB )', 'Core clock ( MHz )', 'Memory clock ( MHz )', 'Config core 1', 'Pixel ( GP /s)', 'Texture ( GT /s)', 'Bandwidth ( GB /s)', 'Bus type', 'Bus width ( bit )', 'DirectX', 'OpenGL', 'Processing Power GFLOPs', 'TDP (Watts)GPU only', 'Features']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Radeon HD 6330M', 'November 26, 2010', 'Robson LP', 'Cedar', '40', 'PCIe 2.1 x16', 'up to 1024', '500', '800', '80:8:4', '2.0', '4.0', '12.8', 'DDR3', '64', '11', '4.2', '80', '7', 'UVD2.2, PowerPlay']
SQL:

assistant: SELECT COUNT("Bus width ( bit )") FROM "Table" WHERE "Bandwidth ( GB /s)" = '25.6' AND "Model Number" = 'Granville Pro';