found this on the forum and it has been fixed now!
Quote
Shadowphyre98 wrote:
I was able to find a fix to the problem. You have to force both the x32 and x64 versions of the game to run on your dedicated video card.
Here is how to do it:
1. Open your NVidia Control panel and go to "Manage 3D Settings"
2. Go to "Program Settings"
3. Select from "1. Select a program to customize:" sub-menu the "Path of Exile" game, and make sure you select "High-performance NVIDIA processor" from the "2. Select the preferred graphics processor for this program". This forces the x32 version of the game to run on your dedicated video card, but does not fully fix the program, because we have to force the x64 version as well.
4. Click on the "Add" button and search for the x64 executable of the game(easiest way is to just run the x64 executable once, and it will appear on top of the list, if not use the "Browse" button), select it and click "Add Selected Program".
5. Do the same thing as stated at number 3. for this executable, and click "Apply". Now you should be able to run the game from Steam and you should have your performances back.