Hello, i am building a new pc, with an intel P4 2,8 GHz fsb800, dvd rom and dvdRW, 512mb memory ddr 400, but i`ve bought a chieftec case with a psu of 300 watt. I would like to ask your advise if you think this psu is enoug and if not, which is the psu that you recomend. Thanks.

another thing, motherboard is a Asus p4p800 deluxe. Thanks again

Ideally you want something that has about 400W or so nothing worse than buying new hardware to find out you dont have enough power supply.

My ideal PSU would be 2000W, and actualy absorb heat to the point where no fans are needed while at the same time reducing sound. But for now Ill just settle with nothing less than a 400W

make sure sure you get a good brand 400Watts means nothing if the make and build is bad. Example had a Qtec(Bad low quality brand) 550 Watt PSU which I thought was powerfull enough, I am running 5 hard drives two optical drives xp2800 CPU and a FX5600Ultra. I upgrae to radeon 9800xt and when I plug in the card into the molex line as it needs it hard drive pack up giving me write / read operaiton errors. Turns out the PSU even though 550 watt has crap current capability and could not cope. SO now running a 480 Watt Thermaltake speed controlled PSU and no problems other good brand is Enermax they do a 450Watt one. They are not cheap about £80 but far better deal than cheaper models as less likely to screw up the system like my old one did.