Linux - Ubuntu 17.10 with AMD Fx(tm)-4170 quad-core processor × 4

[S.R_Howell]

My graphics card is not recognized by Blender yet, but these are my CPU times…

128 * 128 : 8:56.93
64 * 64 : 8:46.79
32 * 32 : 8:38.99
16 * 16 : 8:37.98
8 * 8 : 8:42.38