Will my computer run a decent graphics card with a 300W PSU?

[ryancxg]

What would the results be?
some of my computer specs are:
intel core 2 QUADCORE q8200
6GB
300W 19Amps +12V (made by LITEON)

I was thinking about getting the 9400gt with 300w 18A+12V minimuim requirements.

Will my computer run smoothly with a 300w graphics card and quadcore processor with my PSU?

also random question but are GPU fans annoying? so heat sink vs fan?

Thanks to those who answer. Sorry my computer knowledge is... not very good.

 

[TheViper]

http://www.tomshardware.com/forum/273629-33-will-computer-decent-graphics-card-300w

^You already posted this here.