Sorry for asking, but whats a 3dmark06 benchmark??? What does it do/tell me?

OK, sorry for the double post, but i downloaded a cpuid monitor and it says(temps in celcius, not running in game): CPU Core1: 70-75degrees, core 2:67-72 degrees Graphics card : 72 degrees..althoug i ran combat arms and it jumped to 83 degrees, and HDD 50 degrees.

Good or bad? It did the same screen as the other time again, by this time my laptop has been running for a good12 hours. It also said that the graphics display driver failed...!!! im prettyu sure thats bad...fixes?

If I play any games on my laptop (HP PAvilion dv2990ca) it will run smoothly, however, frequently, int he past 2 days it has crashed showing a very black, with white marked screen...see picture. Any solutions or cause idea? Here's my laptop setup - 3GB DDR2 Ram, Nvidia Geforce 8400m gs, intel core 2 duo T5750 2.00 Ghz, running at a 1200 by 800 resolution on a 14.1 or 15.2 (im not quite sure) screen.

Also, I ran a system restore, and my computer has been running VERY VERY Slowly. Especially the internet...its sooo slow...but that could be just cause im in firefox.

http://i369.photobucket.com/albums/oo131/LeonVerhelst/IMG_7296.jpg?t=1228702786

Thx for the help man.