Game stutters if there's players

[ESCUDO]

UPDATE: Apparently buying an SSD fixes the problem. If you want to buy one just for this game, then go ahead. Alternatively wait™ until SE optimizes the game.


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Game runs normally in areas where there are not much people (always 60fps), if i go into a city it stutters a lot. If i go to a camp it stutters as well if there's people, but not that much.

While on a city it stutters and keeps stuttering if there's players. If there are no players it won't stutter.

No other games stutters like this, i play all my games with 1080p and at least 16xAF and 8XAA and there's no stutter whatsoever even at stock speeds.

This game is a stutter fest.

I'm trying to enjoy the game but i can't, not because of the game itself but because this stutter is getting on my nerves.

System Specs: http://i.imgur.com/yMdef.png

Intel Q9550
nVIDIA GTX 570
Drivers are nVIDIA Forceware 285.27 Beta

Some benchmarks:
Stock CPU speed: http://i.imgur.com/Ex8EV.jpg
Dynamic Overclock to 3.8Ghz: http://i.imgur.com/UGomw.jpg
Always 3.8Ghz Overclock: http://i.imgur.com/M0Fbc.jpg

Also it doesn't matter at all which settings i use in the config because it seems they do nothing at all to help, except Ambient Occlusion (which in this case affects the game globally and not just if there's players) and if i put the textures to Standard it helps a little but still happens. Shadows also do nothing to performance.

Anyone knows how to fix this? Thank you very much.