So I posted my first set of times 2 years ago in the Q&A section (before the forum existed) and with an older, different desktop setup.
2.66 Ghz Dual Core, AMD graphics card, 6 GB RAM, Windows Vista 64-bit.
CPU (actual times)
8x8 - 36:24.62
16x16 - 35:42.98
32x32 - 35:56.36
64x64 - 36:18.00
Now my times have shortened. I currently have:
Intel i5-7600 3.5GHz Quad Core
Same graphics card (saving up!)
Windows 10, 8 GB DDR4 Ram
8x8 - 11:24
16x16 - 11:24
32x32 - 11:30
64x63 - 11:43
128x128 - 12:03
256x256 - 14:09
Quite the improvement!