Phillip Corcoran :
No -- it's a DirectX 11 card (11.2 to be precise): http://www.zotac.com/products/graphics-cards/geforce-700-series/gtx-750/product/gtx-750/detail/geforce-gtx-750/sort/starttime/order/DESC/amount/10/section/specifications.html
I am sorry, you are wrong on this one.
DX12 is designed to work with all current cards and some older models, especially dx11 cards.
The prerequisite being windows 10.
From Windows:
“While we are not yet ready to detail everything related to DirectX12, we can share that we are working closely with all of our hardware partners to help ensure that most modern PC gaming hardware will work well with DirectX12, including; nVidia’s Maxwell, Kepler and Fermi-based GPUs, Intel’s 4th generation (and newer) Core processors and AMD’s Graphics Core Next (GCN) based GPUs. We’ll have more to share about DirectX12 at GDC in March.”
They also say, for the "full" benefits of DX12 you will need a DX12 card. However DX11 and up will work fine with it and utilize a lot of the features.