Have you checked your verify integrity of game cache? If you don't know how this is what you can do. Open up Steam right click on your game skyrim then left click on properties.
Then left click on local files then left click on verify integrity of game cache then it will start to down load some more files once it is done then try your game. If you still have the problem try one more time.
Now if you still have the problem we need to check other things but for now try that and get back to us. Thanks
Well since that didn't work. Does this only happen on this game or does it happen on other games a well? Have you tried to uninstall the game and reinstall it? With what you have you shouldn't be having those problems.
In the nVidia control panel under manage 3D setting and turn off the antialiasing under global settings. Then under program settings. Select a program to customize in the drop down box.
See if Skyrim is in the box if not try adding it. If that doesn't work then uncheck the little box under the drop down and see if skyrim is in there. If it is click on it and now you should be able to set the settings.
If it isn't then just turn off the AA on both places. If my fix doesn't work then try RyQrils. Or you can try his first either way give it a try. Good luck.
I have sort of the same issue. My FPS is around 75-60 then after about a half hour or so of gaming it tweaks out and my FPS drops to about 55-45.
I've noticed through testing that when my videocard hits 61C it starts to lose frames and will never go over 62C because the actual load on the card will drop until the temp drops. I know my videocard can get much hotter before it starts to underclock in the bios, and there are only 3 preset frequencies in the bios.