Sounds a bit strange, 8 mins to load a naked G8F, i say this because my pc, pre xmas 2019 was a intel 1st gen i7 2.2ghz with 8gbs ram, Gtx970 (4gb vram) and 3Hds totalling 2.5tbs, and if you look in my gallery i was rendering 2 G8Fs with different textures etc. i don't think the gtx750 helps as 2gbs on the graphics card is still an issue in daz, as my new machine has inherited the old Gtx 970 and even though it has 4gbs (3.5gbs usable) it still hits issues with texture sizes filling up the memory. have you checked to see what is the max size of the virtual HD allocation? as this might help speed things up a little. try loading up a blank G8F with no textures attached to see if that helps, i know the morphs can bloat, but not to that amount, my scenes never get that high on only one G8F.

Getting old and still making "art" without soiling myself, now that's success.