Re: All Graphics Cards related queries here.
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pulsar_swift - the rating is somewhat mosleading - there should be a combined wattage rating of the 2x +12V rails - for eg. CM 500W extreme power plus has also 18A+18A rating for 2x +12V rails but the combined output is only 360W
A typical distribution for 2x +12V rail is :
one +12V rail is for mobo power cable and all other peripheral cable and another +12V rail is for cpu power connector.
Now theoretically if your CPU draws power from a separate +12V rail then the load on another +12V would be around 200W
But now for practical thing - VIP 500W Gold's power rating is very deceiving as even a CM extreme power plus 500W has a rating of 360W for it's combined +12V rails but your's is around 432W which is simply impossible.
I've a big doubt even if it can deliver 280-300W - so there is a great risk with your current PSU if you want to buy a new gfx card like HD 5750.
So it's better be safe to buy a new PSU from brands like FSP,CM,Gigabyte,Corsair or Seasonic which has decent ratings ( and somewhat real )
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clmlbx - you are talking about Tagan 500W TG500-U37 right ? it's from tagan's stonerock series - well it should support the load of your rig along with a 9800Gt.