hi, this is a very serious question as im worried.. im running a p4 HT enabled 3.2ghz 800 fbs 4gb sdram2 800 fbs 2x dvd rewriters 120gb hard drive 7200rpm radeon x800 pro (overclocked) total is 1150mhz windows xp home plus 2 system fans plus the 1 built into graphics card plus cpu fan total of 4 fans and the really funny thing is im running it off a 250watt psu surely this is not safe???? the temprature is fine it reads 45-47oc on psu processor runs full wack at 65oc system temp does not go over 31oc what advice can you give me from your experiances i might just buy a new psu but if its ok i wont lol.
System Requirements: Radeon™ X800 XL, Radeon™ X800 PRO, Radeon™ X800 XT and Radeon™ X800 XT PLATINUM EDITION require a connection to your PC's internal power supply for operation. Consult your system builder or OEM to ensure your system has an adequate power supply. Otherwise, ATI recommends a 300-Watt power supply or greater to ensure normal system operation where a number of other internal devices are installed
So it is possible that you are stretching it a little. However, if the PSU is from a good quality brand and you are not noticing any problems with the computer then it is probably okay. It's up to you though really, a more powerful psu won't do the pc any harm.