user: Question: What was the maximum fab (nm)?
Columns: ['Model', 'Launch', 'Model Number', 'Code name', 'Fab ( nm )', 'Bus interface', 'Memory ( MiB )', 'Core ( MHz )', 'Memory ( MHz )', 'Config core 1', 'Pixel ( GP /s)', 'Texture ( GT /s)', 'Bandwidth ( GB /s)', 'Bus type 2', 'Bus width ( bit )', 'Processing Power GFLOPs', 'DirectX', 'OpenGL', 'TDP (Watts) GPU only']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Radeon HD 7430M', 'January 7, 2012', 'Seymour Pro', 'Caicos', 40.0, 'PCIe 2.1 x16', '1024', '600', '900', '160:8:4', '2.4', '4.8', '14.4', 'DDR3', 64.0, '192', '11.0', '4.2', '7']
SQL:

assistant: SELECT MAX("Fab ( nm )") FROM "Table";