For a good general indication of how well any particular GPU will run games compared to others, I like to refer to the latest Tom's Hardware "Gaming Graphics Card Hierarchy" which is published monthly.
Here's the latest (December 2013) one by way of example.
http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html
Find your graphics card on this ladder and see how it compares. The higher up the ladder your GPU appears, the better its likely performance will be for gaming purposes.
Note how Integrated processors (like the Intel HD Graphics series, or AMD integrated HD series) do not fare so well as discrete cards (though recently there have certainly been considerable improvements in their overall performance in the Intel Haswell CPU series that sport integrated graphics processors.)
Other factors being equal, it is also largely true that the mobile versions ("mobility" etc.) found in many laptops and tablets do not perform quite as well as the reference, discrete GPUs they are based on as they are typically optimised for lower overall power consumption than their desktop counterparts.
Naturally, exceptions to this rule-of-thumb exist, but they are rare and often expensive.
That said, the GT745M looks to be fairly capable and is a DirectX 11 compatible graphics card. (See the Notebook Check review here:
http://www.notebookcheck.net/NVIDIA-GeForce-GT-745M.90244.0.html )
Cheers!
PC
