There are some top gaming laptops in your price range such as ASUS G51, Gateway P.
They all have a good graphic card to play all latest games in high settings...
I have some good gaming laptops to recommend but your budget is a little bit low. Currently a gaming laptop that meet your requirement is about $700 or above...
Are you following the process of updating BIOS step by step? Any error operation may lead to undesiable results. If you still can not fix the problem after updating the BIOS, you may encouter a hardware problem. Contact Toshiba reps...
The one you pick - ASUS G51J-A1 is very good for gaming with a good price.
There are also some model you may like such as Alienware M17X, Gateway P series, HP envy 15... They are all top gaming laptops can play latest games in high details.
Now the price is much cheaper.
If you have budget of $2000 you can get very well configured top gaming laptop Alienware M17X to play all latest games in high details such as Crysis, COD4,5 and etc...
It's worth every penny...