GPU isn't enough information.

CPU:
GPU:
RAM (type/gigs):
OS:

If you are finding it hard to locate this information, there is a free utility tool called Speccy i recommend.

Please remember in future for all games when posting about performance issues that this basic information is required for people to even have a means to help.

Judging that you don't have a mouse next to your name, you've refunded it.... or sailed the high seas. Really hope it was the former given how cheap this game is.