I hope you can do without graphics.
Write speed needed for H.264 modes: Manual
Write speed needed for MLV modes: Shown in bottom lines while adjusting resolution. Or
RAW CalculatorOr build your own:
Horizontal x vertical resolution x frame rate x bit depth x compression ratio / 8 = Bandwidth in Bytes/s.
Compression ratio = 1 without compression.
Compressio used: Typical between 0.4 and 0.6, depending on scene.