Whats the difference between Directx 9 vs. Directx 11?

[Saverem]

So I recently got a GPU good enough to run WoW in absolutely max settings and still get 60+ FPS in the main city. I had a graphics API set to Directx 9 so I decided to change to Directx 11 in the options. It didn't seem to do anything.

Is there a purpose to the Directx changing?

[BicycleMafioso]

DirectX adds increased features such as sunshafting, water-effects and most of all, tesselation.
Wow doesn't have very good support for DX11, as they've just added bits. You will regardless most likely get FPS-increases in Wow by enabling dx11.

[Cyanotical]

if your GPU doesn't support DX11, you will not see any change by using it, if it does, the most obvious change is better frame rate, and maybe a bit more fluid water

---------- Post added 2011-07-30 at 11:18 AM ----------

tesselation.

ya know, i run the heaven benchmark to demo tess. but the funny thing is in crysis 2 i have to go out of my way to find some, and even then it looks like crap compared to heaven, not really sure its a big deal atm

[Saverem]

DirectX adds increased features such as sunshafting, water-effects and most of all, tesselation.
Wow doesn't have very good support for DX11, as they've just added bits. You will regardless most likely get FPS-increases in Wow by enabling dx11.

Cool, you're right. The water reflection and sun beams are different now.