I had that problem with Ati Tray Tools installed... unistalled the tray tools and reinstalled the most recent catalyst drivers was the solution.

Have you ensured you have the correct ini files like Luthier sugested, if you had cloud save turned off you may still be using old ones, which can do some odd things, they are quite a bit different now, but be warned you may have to back up your controller settings, or redo them, I deleted the 1Csoftclub folder, renewed it redid my control mappings and it has been stable since then

I dont think you read my post properly, you can see that I have already followed all the advice from Luthier about cloud sync.

Originally Posted by FS~Phat
Not playable on my system now with too much stuttering and the FPS sometimes 70-80FPS and then same mission next replay is 25-40FPS.

This on high spec quad crossfire system. Doesnt matter what graphics settings I set still have the same problems.

Oh an I also get UBI logo freeze and system crash sometimes and then othertimes the game continues to load but it wont load textures after going to play mission just stays at 0% loaded and have to kill launcher process with taskman.

I deleted all ini files and verified with steam and with cloud service enabled.

We're going around in circles here guys... please stop adding new/re-enabling features until you have a stable patch!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!! PLEASE!

Actually i have this same problem, sometimes when i start the game i got solid and steady 60FPS, and maybe next time i got only 30-40FPS in same place, same plane and same clocktime. Really weird stuff.

Give t his a try...
http://forum.1cpublishing.eu/showthread.php?p=287425

+1 :confused: (2x5850 crossfire)

Yeah was me found that, it was the ubi splash wmv locking some ATI cards into video render, not detecting the switch back to 3D clocks. Doesn't sound like this fellow's issue though, if fps was fine before the patch - in fact this patch + Cat 11.5 solved the ubi problem for me and the .wmv no longer needs renaming.

Unless a check with GPU-Z or similar shows an ATI card underclocking to around 400mhz throughout, there's no need to do it.

Lots of people reporting steadily decreased performance though which is starting to worry me. I've just been trying out CEM in different planes on the 'cross country' quick mission and by the time I'd gone through the UK planes and moved on to trying out CEM in the German planes my performance had dropped to the point I'd started getting stutters/slowdowns at low level, which I don't get on first play. Additionally, this issue seems even more pronounced when using crossfire.

OK, i was just doing some MP. Sorry 1C but at least for me this MP (and with that the whole game) is broken. I am mostly german pilot and as the 109 is currently there is simply no reason to play online since its nothing but suicide to fly it.
FIX THAT PROPOPITCH - PLEASE!

Winger

Yes, we need another hotfix that resets the prop pitch angular rates to the prehotfix status. The 109 is unplayable currently. Please fix urgently given that it is the only decent axis fighter

I agree with you to some extent but the 109 is still playable for me. I map the propeller pitch on a axis on my saitek quadrant ( lever down decrease pitch and lever up pitch increase and at middle of the axis well neutral ( not like the cockpit animation ). I hope that the Dev team will soon correct it like it was meant to be in a more realistic way just like the real thing. !