primordial stew
Emperor
maybe I'll try to run it in a window though I don't much like to run games in a window
@docbud
no it doesn't really depend from all that, or rather yes it's influenced but you knowing that stuff won't change a single thing
but since you asked for it:
i7-2600k
16Gb RAM
GTX470 oc (approximately the performance of a GTX560Ti)
Civ doesn't utilize it like a SSD like it should (ie many parallel requests), but loading times are certainly decreased. With 16G you could use a RAM drive and put civ5 on it! Loading the RAM drive up after boot would take a bit.. but couldn't be beat after that (just sleep instead of reboot)!
Also, more VRAM seemed to help, at least for reducing the amount of heat generated (textures kept in memory instead of swapped in regularly?). I've got 2G and Civ indeed uses it all. It would be interesting to hear if anyone with a 3G, or more card, ever sees civ not use it all.
I play windowed mode so I can surf, watch a video, or whatever while waiting for those late game huge map turns to complete... so yeah, turns are still slow for mega games. Not for lack of hardware, but for lack of efficient or scalable software.