Video card cause crash after 2-5 minutes

[Cope]

Hi,

I just bought a new video card (Sapphire Radeon HD 4670, 1gb, DDR3) in order to be able to do more then browsing the internet, because my old one was in my motherboard. I followed all the instructions to install it. Then I restarted my computer, everything looked alright, but after several minutes (2-5 minutes) my computer restarted with a blue screen and did this every 2 to 5 minutes.

So I looked at the minimum requirements and found out that I needed a power supply with 400w minimum (I had a 300w), so I went to a store and bought a 450w and thought that this would solve the problem. But I still have the same problem, computer crashing every 2 to 5 minutes.

Here are some info from the Everest Program (the video card that I currently use is the old one):

    Computer:
      Computer Type                                     PC multiprocesseur ACPI
      Operating System                                  Microsoft Windows XP Media Center Edition
      OS Service Pack                                   [ TRIAL VERSION ]
      Internet Explorer                                 7.0.5730.11 (IE 7.0)
      DirectX                                           4.09.00.0904 (DirectX 9.0c)
      User Name                                         Admin
       Logon Domain                                      [ TRIAL VERSION ]
      Date / Time                                       2009-08-31 / 12:27

    Motherboard:
      CPU Type                                          DualCore Intel Pentium D 805, 2666 MHz (20 x 133)
      Motherboard Name                                  ECS RC410-M2  (2 PCI, 1 PCI-E x1, 1 PCI-E x16, 2 DDR2 DIMM, Audio, Video, LAN)
      Motherboard Chipset                               ATI Radeon Xpress 200
      System Memory                                     [ TRIAL VERSION ]
      DIMM1: Hynix HYMP112U64CP8-Y5                     1 GB DDR2-667 DDR2 SDRAM  (5-5-5-15 @ 333 MHz)  (4-4-4-12 @ 266 MHz)  (3-3-3-9 @ 200 MHz)
      DIMM2: Hynix HYMP112U64CP8-Y5                     [ TRIAL VERSION ]
      BIOS Type                                         AMI (06/02/06)
      Communication Port                                Port de communication (COM1)
      Communication Port                                Port de communication (COM2)
      Communication Port                                Port imprimante ECP (LPT1)

If you need any other information please let me know.

Thanks a lot,

Cope

 

[Cope]

I just downloaded the latests version of the driver, now it crashes each 30 min to 1 hour. Any idea of how to solve this?

Thanks,

Cope