I have purchased a PNY nVidia GeForce 9800 GT EE 1024 graphics card. I can not get it to post. My system is home built. My OS is Windows 7. M/B is ASUS M2V-MX SE. Processor is Athlon Duo Core 2500mhz. 4GB Ram. After installing video card and rebooting system card will not post.I upgraded my PSU to a 750 watt Antec with 12v - 25 amp available. When I reinstall previous video card shows up immediately. Can any one help. Contact is email removed