https://www.youtube.com/watch?v=ho9vW88O2UM
This is a video that demonstrates the problem, the game is not in sync unlike my tbc/wotlk clients which run perfectly as well as other games. The problem can also be seen when you right click and turn around your character, it looks pretty choppy when it turns. My FPS is a lot lower than in 2.4.3 client also, around 60-120 with vsync off, in 2.4.3 it's always hovering around 250-300. I've noticed the same issue on 2 other modern computers which belong to my friends, we all have the same problem only for 1.12, no matter what realm it is. I have the latest drivers for everything, have tried formatting, using xp mode and following the performance guide in this forum -- nothing helps so far. I'm guessing though there are some pretty computer-savvy people here who can help me.
The problem can be a little bit alleviated if I run some 3D application programs, but far from perfect. The FPS will get higher but problem remain. My guess it has something to do with not utilizing my GPU fully, and this I also notice when I play TBC the fan is spinning faster compared to vanilla. Is there some way to always set GPU to maximum performance maybe?
My specs are the following:
Nvidia GTX 560Ti
Intel i5 2500k 3.4ghz
8GB memory
Windows 7
100 mbit fiber net (in case it would have something to do with packet loss which I doubt)
Would really appreciate all your suggestions! Tried fixing this problem for over a month.