I have recently upgraded my powersupply from 300W to 450

I have Athlon 1800+ oc/1900+
3 hard drives
and
2 CD-rom drives
1 Radeon 8500 card
1 SBlive
1 controller card
1 network card

Now I just received electricty bill, which was at $90US (that's electricity alone). (I put computers on 24hours a day for about 20 days a month)

My father went angry, because his business has the electricy bill of around $80 for 5000sq furniture store.


Now that I have upgraded my power supply to 450...
Will the new ps consume 50% more power (compare to 300W), thus further increase the electricity bill?? (this suck!)

Should I get 200W powersuppy and make a small server or something?
Coz I need to run my computer all night to d/l, upload.
(KaZaA, Morpheus, personal data sharing with MSN...etc.)
I'm should bring back dad's P166 or something...