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well i will have to calculate out everything.. and see what i come up with... i just wanna have a psu that is gonna last me several years
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If you didn't notice, the ppc&c p/s units have a 5 year warranty ( and from my experience you won't make use of it
The last week I've been using one of my Turbo-Cool 450s to run some testing on a new m/b, cpu, memory combo and have been from relatively low load (50% of max FSB/core speed) up to max stable speeds using a variety of test and bench software. During the entire course of the testing NONE of the supply voltages have varied by more than 30mV and the +5V and +3.3V haven't varied by more than 10mV going from idle to max load
Power calculation wise, for everything you have you should be able to get typical, max, and surge power requirement ratings. As a starting point, AMD recommends 210W combined on 3.3 & 5V rails for a typical XP system as I remember(this for memory, CPU, m/b). The Turbo-Cool 450 has a 300W rating combined for the 3.3V & 5V rails. You should have NO problem with a fully loaded system there.
You can get the power requirements for most any hard drive (or add-in card for that matter) directly off the manufacturer's web pages. Be sure to use the SEEK power (when the drive is actually moving the heads, not when it is sitting idle). Another starting point: large 10K SCSI drives run in the 1A to 1.5A range for active seek power requirements and in the 2A to 2.5A range during initial power for spin up of the platters (surge power rating).