bits 2 [1280x2560] rel err 1.65e-03 ok    241.1 us    42.5 GB/s
bits 2 [2560x640] rel err 1.66e-03 ok    118.8 us    43.1 GB/s
bits 3 [1280x2560] rel err 1.68e-03 ok    242.0 us    59.2 GB/s
bits 3 [2560x640] rel err 1.65e-03 ok    123.8 us    57.9 GB/s
bits 4 [1280x2560] rel err 1.65e-03 ok    240.2 us    76.7 GB/s
bits 4 [2560x640] rel err 1.64e-03 ok    121.3 us    76.0 GB/s
bits 5 [1280x2560] rel err 1.66e-03 ok    245.0 us    91.9 GB/s
bits 5 [2560x640] rel err 1.66e-03 ok    123.6 us    91.2 GB/s
bits 6 [1280x2560] rel err 1.65e-03 ok    249.0 us   106.9 GB/s
bits 6 [2560x640] rel err 1.67e-03 ok    125.2 us   106.3 GB/s
bits 8 [1280x2560] rel err 1.67e-03 ok    246.3 us   141.4 GB/s
bits 8 [2560x640] rel err 1.68e-03 ok    124.6 us   139.7 GB/s