Windows 7 64 bit(Professional) game crashes

[hesperol]

Hi

MY PC:

Intel Core 2 Quad Q9550 2.8 Ghz 
ATI radeon 4870 1GB DDR5
8GB ram
motherboard : Gigabyte

I'm having the folowing problems :
1: When I play a game , mostly it springs back to desktop after a while (Program doesn't react)
2: NFS shift and GTA4 are unable to play , NFS blocks on the startup ; GTA4 is very laggy

-So i thought it was my videodriver , downloaded the new one from ati , installed it , but still the same problem...
(driverdate was still the same after update )
- I searched my motherboard and installed new drivers , still the same problem...

Someone has an idea what my problem is?

thank you!

 

[TorrentG]

Yes. The problem could possibly be heat. Download and use ATI Tray Tools to set the fan at 100% while playing games and see how it goes.

What's the date on the driver you have installed now? (Latest is almost always best.)

 

[hesperol]

I don't think it's something with the heat because NFS shift chrashes when the loadingbar appears.

Before the installation of the new drivers , the driverdate was 21/09/2009

After I downloaded the new drivers from ATI(yesterday) and installed them on my windows 7 professional , nothing seems to be different...
The date of the driver was still 21/09/2009.

I also have Directx 11.

 

[Kougar]

What OS are you using, specifically is it 32 or 64bit? I am assuming it is 64bit... the driver for that card was updated 12/17/09 http://game.amd.com/us-en/drivers_catalyst.aspx?p=win7/windows-7-64bit

Also worth mentioning, is the OS and games both fully patched and update to date? The OS will support DirectX11, but your graphics card is limited to DX10.1.