Computer experts, what is advantage of dx11 vs. dx9?

[Brooke]

I can run either dx9 or dx11 version of AH3 on my setup.

What is the advantage of in AH3 of dx11 vs. dx9?

[Wiley]

Simply put, if your machine supports DX11 it generally runs more efficiently.

Wiley.

[Drane]

Originally I believe DX11 version came about because some or all of the virtual reality (VR) equipment manufacturers were only supporting that.

[Bizman]

Both. Efficiency, better effects handling etc. Aside of VR, it also works better on high resolution/high speed monitors.

[BBQsam]

My AH3 PC:
I5
nvidia GT730   2 gig ram
8 gig system ram
windows 10

40 inch tv 1080p  hdmi

which AH3 version should I use?    Dx9    or Dx11  ?

Thanks     

[Bizman]

My AH3 PC:
I5
nvidia GT730   2 gig ram
8 gig system ram
windows 10

40 inch tv 1080p  hdmi

which AH3 version should I use?    Dx9    or Dx11  ?

Thanks     

All the components you mentioned plus the OS support the latest version of DirextX, so 11 seems the logical choice to me.

[BBQsam]

THANKS Bizman!   

That was quick,  you    from Finland are fast,  I'm guessing helps keep you warm way up there.
 

[Randall172]

Direct X is a collection of APIs that abstract out many of the nitty gritty hardware stuff that you need to do to make a video game.

DirectX 11 is going to have more features and be better optimized than directx 9.

the downside is you you have a compatible/newer card to actually run it, but if you can run it, there are only benefits to doing so.