DTTest
Intel Core i7-4770 testing with a ASRock B85M-ITX and HIS AMD Radeon HD 7970/8970 OEM / R9 280X 3072MB on Ubuntu 17.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1704078-RI-DTTEST63369.
Darktable
Test: Boat - Acceleration: OpenCL
Phoronix Test Suite v10.8.4