I have been watching gameplay videos and screen shots of STO and the quality is much better than what I am playing on my computer. The graphics aren't smooth or anything. I feel as if it is a game made five years ago. Maybe it is my graphics card or something about my computer. I just bought it 6 months ago. Here are my specs. Please help. I want to enjoy the game

Processor: AMD Athlon 7550 Dual Core Processor 2.5 GHz
8GB ram
Windows 7 Home Premium
64-bit operating system
Video Card: NVIDIA GeForce 9100