Last week i bought a fairly good new pc. It was running smooth on ultra in most games, including wow and far cry 4. The past few days i've had some issues with wow though. While i previously ran wow at 100-120 fps on ultra, i am now getting "high" as reccomended settings, and seeing 30-40 fps with lagspikes even below high settings. I was recording in raids on ultra with no problems a few days ago.
I am running Windows 10, don't know if there are still some optimazation issues with some software im running that can cause this.
I have a Skylake i5 6600k clocked at 4,2Ghz. Asus Geforce GTX 970. 16 gigs of DDR4 memory. 2x 250gb SSDs.
Solved: My motherboard software (Asus AI suite) was forcing power saving mode, even though it was set to "performance"