Because why not.
HD 7950, 15.7.1 drivers
Compute only:1. 30.68ms ~ 512. 245.03ms
Graphics only: 62.50ms (26.84G pixels/s)
Graphics + compute: 1. 58.89ms (28.49G pixels/s) ~ 512. 245.48ms (6.83G pixels/s)
Graphics, compute single commandlist: 1. 89.52ms (18.74G pixels/s) ~ 512. 303.73ms (5.52G...