Sudden LOW FPS, stuttering

Hello,

I would like to know if anyone experienced something similar:
Since yesterday afternoon im experiencing stuttering and low FPS, around 25-30 FPS in the classic zones and bellow that in Northrend (10-20 in DALARAN) even tho the game ran just fine before with settings on ULTRA at 60-120 FPS. I mention that i made no change in PC or INGAME settings. The framerate seems to drop especially when im moving around, and when my screen is looking far out where view distance comes into play.

The only settings that seem to affect this are indeed the View Distance and the Shadow settings but even if i turn those down its still stuttering and the framerate doesn't improove much.

Tried updating video card drivers, cleared CACHE / WTF folder, turned off all addons, checked if anything is running in the background. Checked for PC temperature (even tho im getting ingame soon after turning the PC on). Tried with different clients, both WoD models and old models.

PC specs: Intel Core i3-2120 CPU @ 3.30 GHZ, 4GB RAM , SAPPHIRE Radeon R7 250, 2GB GDDR5, 128-bit

I'd appreciate any help,
Thank you.