I did know before start that i have to use my GPU rather than my 6 years old CPU 
gtx 1080
1:24 960/560
1:13 512/512
1:12 400/400
1:13 350/350
1:16 256/256
1:18 240/140
Amd FX 8320
more than 10 min 512/512
around 8 min 256/256
around 6:50 min 128/128
6:04 120/ 67
5:53 64/ 64
5:46 30/ 17