Want to test my PC's hardware.

[cksmith]

I Recently built a new PC and I want to run some tests on it to make sure everything is working properly. I've been running a few games on it (Starcraft2, Fallout3, etc) and it has been doing very well on max settings but i would just like to make sure everything is as it should be. Can anyone reccomend a free software program that will test my CPU, RAM, GPU, etc and make sure it is working properly? I am running on Windows 7 so for all i know it has a utility to test components but as ive said in earlier posts i know very little about computers .
Any help would be appreciated!
Not sure if the components themselves make a difference in the program selection but here they are anyways.

System specs are
ASUS M4A79T deluxe mobo
AMD Phenom II 965 BE
OCZ AMD BE RAM
XFX radeon 5800 xxx ed.
Kingwin Lazer 750watt PSU
Running on Windows 7 64bit premium edition.

 

[jefe323]

prime95 is a good one

 

[has22fas]

3DMark06,
1) Run it
2) Compare your scores to similar pc's
3) if scores are similar theres nothing wrong

 

[king smp]

Also Hiren's Boot CD has some good testing software.
You would have to download it as an .iso file and then burn it as an image to disc.
Then you boot from cd.
PC Check on there tests all components.
I am just not sure if it works properly on new equipment.

 

[cksmith]

Thanks for the help fellas.