The i3-4130T is a lower voltage version of the i3-4130 CPU, which is a great CPU for Dolphin. The 4130T that you might buy will still be a good choice, though. You might not be able to play the more demanding games, but light to medium games will play near fullspeed.
You may just want to spend the money and get an i3-4130 or spend a little more and get the i3-4340. You will get better results playing more demanding games.
You may just want to spend the money and get an i3-4130 or spend a little more and get the i3-4340. You will get better results playing more demanding games.