Intel unleashed a flurry of new processors at Computex, including the T9900 Core 2 Duo, ... as well as the 1.3 GHz SU2700 ULV Pentium processor and accompanying GS40 express chipset. ...

This is often known as a CPU bottleneck, and it’s exactly where a CPU upgrade can help. That being said, it’s not always worth upgrading if your GPU usage isn’t perfect.