Denis_43 No one appreciates classic computer hardware more than me. But be good to yourself and your computer. The PSU below has solid performance and offers great value. If your graphics card holds sentimental value for you and you're not willing to part with it, then so be-it. But for just $50, you could buy a used 750 Ti off Ebay, and it would offer 4x greater performance:
http://gpu.userbenchmark.com/Compare/Nvidia-GeForce-8800-GTX-vs-Nvidia-GTX-750-Ti/m9271vs2187
If you proceed with the 750 Ti, just make sure that it has the video output that you require (e.g. VGA, HDMI, etc).
SeaSonic S12II 520
$44.90 ($29.90 after $15.00 rebate)
https://www.newegg.com/Product/Product.aspx?Item=N82E16817151094