How good is Integrated GMA X4500 Graphics

Might give you an idea;
3DMark06:
T8300+Geforce 8400M GS-1333
T9300+Geforce 8400M G-1044
X9100+GMA X4500-955
T9400+GMA X4500-949
T7700+GMA X3100-586
T7500+GMA X3100-555

World in Conflict 1024x768 Low:
T8300+Geforce 8400M GS-21
T9300+Geforce 8400M G-12
X9100+GMA X4500-16
T9400+GMA X4500-15
T7700+GMA X3100-11
T7500+GMA X3100-11

World in Conflict 1024x768 Very Low:
T8300+Geforce 8400M GS-27
T9300+Geforce 8400M G-15
X9100+GMA X4500-22
T9400+GMA X4500-21
T7700+GMA X3100-14
T7500+GMA X3100-14

Not very.

Take a look at the hierarchy chart
http://www.tomshardware.com/reviews/best-gaming-graphic...

The X4500 is 6 up from the Bottom on the right, its about a low as you can still get your hands on these days.

Ever heard of Etch-A-Sketch?

This review provides a short analysis and then some benchmarks in major games.

http://www.notebookcheck.net/Intel-Graphics-Media-Accel...

But basically its good for web surfing and video--not for games.