I'm running on a fairly old system using a dual core processor, Intel E8400, and a dated GPU, HD5770, and my game runs horribly slow (also 4g ram). It lags and jitters every time i speed it up from the normal gameplay speed. I'm thinking that a game of such complexity naturally lags when you speed things up so I haven't complained too much. Though, playing the game is mostly an endless scene of lag and jitters
Two funny things I noticed that might add to the discussion. Playing as Muscovy, I found that there's an 'invisible' radius around the information and flags in the left corner (manpower, monarch points, diplomatic relations etc.) and whenever my mouse gets inside this radius (aprox 2-3cm distance from the information bar), my FPS drops a lot (from 50 to 7-10). I assume because it has to compute a lot (very CPU intensive). This happened when I had a mission to subjugate Novgorod (it had a list with all the provinces I got claims on, and had to core).
So I try not to put my mouse up in the top left corner when I speed it up.
I think it takes 8-12 seconds for one month to elapse on full speed.
My FPS will also drop to 5-6 fps if I go to the amazon or Siberia and zoom in on the woods. Apparently this is very taxing on the GPU.
These experiences are only early game (till 1510) and I do not play on max settings (no AA, no shadows or reflections), with a resolution of 1600x1050.
1.8 didn't change it for better or worse.
Obviously thinking of upgrading. Anyone has any good experience with the fx 8320 and this game?
I also read that an SSD would help a lot except if you play Ironman, since that's a connectivity problem mostly. It would still help loading times I assume, although maybe not immensely compared to non-ironman mode. I'm no wiz. Maybe someone has some input on this? Firing up the game on my old 7200rpm HDD takes one unit of 'coffee cup' (I am able to mill the beans, brew the coffee, pour it and add milk, and return to my chair before it has fired up). Which is oddly satisfying. EDIT: Loading the game up has increased with 1.8.