Weird PSU issue

[SoundFrenzy]

I was looking into buying the evga CO 6800gs for Oblivion. Since at the moment i have a AOpen 5600. So I was wondering if i needed a new more powerful PSU. So, i looked at the eXtreme PSU CAlculator (http://www.extreme.outervision.com/index.jsp) , and lo and behold it said that i needed a more powerful PSU for the 5600 than the 6800gs (345 vs 335 watts). Now here's the catch, i'm currently running a 250 watt PSU, with no problems. Should i go for a new PSU, or am i safe with what i have?

Here's what else I have:

AMD Athlon 64 2800+ Newcastle overclocked to 2250 MHz
SoundBlaster Audigy
x4 USB devices
1024 Mb DDR Ram (3 sticks)
x1 Regular Fan
x1 LED Fan
x1 80g 7200rpm IDE harddrive
x1 DVD-ROM Drive
x1 CD-RW Drive
x1 Cold Cathode

 

[cowboytech]

A friend used to work in a power supply factory. Now picture this, someone comes along and says, "time to change the lables" (meaning the ratings) and nothing else is changed but the lables. So, take the signs for what they are worth (like some guarantees). That is one of the reasons I like test sites like this one on "TomsHardware", so I don't have to learn the hard way so often! You can get a bigger PSU and hold this one as a spare, or chance under powering and overheating your components