Generally working well for me too, apart from the occasional bugs (which are by now well documented by the community so that the developers can fix them, plus i've found work-arounds for quite a few of them) on a respectable but definitely not top of the line PC which is two years old.
I have a low amount of RAM and an older GPU (powerful enough but with a lower amount of VRAM than current cards) so i'm running mostly medium settings with the exception of model detail and land shading which are set to high. SSAO is off, but roads, shadows and Vsync are on.
I'm running a resolution of 1680x1050 (monitor native resolution) on a 22" Dell 2209 WA IPS panel, the rest of my specs are:
Asus P6T Deluxe motherboard
i7 920 (the early C0 stepping) @ 2.7 Ghz (the stock speed)
3GB of DDR3 RAM in triple channel configuration
Msi Cyclone Ati 4890 1GB
win7 Pro 64 bit
I get anywhere from 30-50+ FPS depending on the amount of things going on over balanced terrain (still over land, but not when skimming the rooftops over London), with occasional dips to 25 or so when a lot of stuff needs to be suddenly loaded. This is with the well documented Ati issues and after having renamed the Ubi logo to stop it from playing during launch, so that the GPU drivers don't "lock" it into flash video mode that runs lower clock speeds.
I expect that if up the RAM a bit it will help with the loading pauses (which still doesn't qualify as a continuous stutter, just momentary FPS loss when it needs to suddenly load a bunch of textures, after they're loaded it's smooth for the remainder of the mission) as 3GB is a bit on the borderline: 800MB to 1GB for the OS, which leaves less than the 2.8 GB that the sim can currently utilize.
If we get a 64-bit executable to make the sim utilize more RAM and i up my RAM to 6GB (another bank of 3GB in triple channel) i expect it will see massive improvement, as it will be possible to load textures into RAM and swap them to and from the GPU a lot faster. Maybe i'll even be able to turn up a couple of settings in this case since it will be easier to swap them in/out of the VRAM without loading from the hard drive.
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