I have a similar 2GHz Amd based laptop. Imagine my surprise at doing over a billion integer math operations a minute. It's a value machine and it did amazingly well at our custom code written in C# 2008.

Since you can't change the CPU in your case, consider getting the laptop you really wanted.

One thing. Check that your power profiles and don't expect it to run full tilt under battery power (unless you changed this.) I don't offer a tutorial on this.
Bob