New TwinTech GeForce 9800GT 1GB DDR3 not working

I have installed a new Twintech GForce 9800GT 1 GB DDR3 card to my PC and it doesn't work. I get the 1st Windows XP screen up, and then the screen goes black. It sounds as though the OS completes loading but the screen remains blank. I have uninstalled the drivers of my old graphics card. Can anyone help?
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  1. please list your full system spec's.
  2. Rustyy117 said:
    please list your full system spec's.

    Hi
    The system is a custom built PC
    500 watt PSU
    EVGA Nforce 650i Ultra Motherboard
    Intel Q6600 (4 x 2.4GHz) Quad Core Processor
    2GB DDR2 800MHZ RAM
    500GB SATA Hard Drive
    20x DVD +/- RW
    DVD ROM Drive
    All in 1 Memory Card Reader
    Flopp Drive
    Int. 802.11g Wireless LAN Card
    MS Windows XP Home Edition
    The Graphics card was a NVIDIA 8500GT 512MB, which I have replaced with the GF 9800GT as I was getting a scrambled display nearly every time I booted up, and very often, if it wasn't scrambled at first, it did so after some time.
  3. Did you uninstall the drivers and then reinstall for the new card?
  4. Mousemonkey said:
    Did you uninstall the drivers and then reinstall for the new card?

    Yes, I followed the manual for the new card, and uninstalled the old drivers,
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