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Old 12-September-02, 02:38 PM   #1 (permalink)
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Default Power Supply Needs

Hey..... Im looking for a decent calculator or other such site/app that will calculate what power supply will be best for my computer..... any help would be appreciated.
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Old 12-September-02, 03:10 PM   #2 (permalink)
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You really should do a search in the forums, I have posted this multiple times.
Add up only the components below that your system has to determine wattage:


AGP video card - 35-50W
PCI video card - 35W
AMD Athlon 900MHz-1.3GHz - 50W-65W
AMD Athlon XP 1.47MHz-1.73GHz - 60-75W
AMD Duron 1.0MHz-1.3GHz - 50W
Intel Pentium III 800MHz-1.4GHz - 40W-55W
Intel Pentium 4 1.4GHz-2.0GHz - 65W-85W
Intel Pentium 4 Northwood 1.6GHz-2.0GHz - 60W-75W
Intel Pentium 4 Northwood 2.2GHz-2.53GHz - 80W-90W
Intel Celeron 1.0GHz-1.1GHz - 35W
Intel Celeron 1.2GHz-1.8GHz - 45W-65W
ATX Motherboard - 40W-65W
128MB RAM - 10W
256MB RAM - 20W
24X or higher IDE CD-RW Drive - 35W
32X or higher IDE CD-ROM Drive - 25W
10x or higher IDE DVD-ROM Drive - 20W
SCSI CD-RW Drive - 17W
SCSI CD-ROM Drive - 12W
5,400RPM IDE Hard Drive - 13W
7,200RPM IDE Hard Drive - 18W
7,200RPM SCSI Hard Drive - 24W
10,000RPM SCSI Hard Drive - 30W
15,000RPM SCSI Hard Drive - 45W
Floppy Drive - 5W
Network Card - 4W
Modem - 5W
Sound Card - 5W
SCSI Controller Card - 20W
Firewire/USB 2.0 Controller Card - 40W
Case Fan - 3W
CPU Fan - 3W

The wattage numbers above are estimates and may be rounded to the nearest 5 watts. The given wattage may only reach the specified level during power-up or during peak usage. Always purchase a power supply with a bit more wattage than you calculate you'll need, to make room for future upgrades.
PS Dont forget anything

Also 256MB is not enough for XP! 512 minimum. XP runs 170MB at idle. Running 4 windows and Winamp3 I use 251MB.
If you Game at all you can hit over 400MB easy.


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Old 12-September-02, 03:23 PM   #3 (permalink)
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Duck, I think Sno2dude was just caught a little off guard. I don't think he imagined that this had been covered in such excellent detail previously.

Maybe it should go in the mod-link DB or get a sticky somewhere ?
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Old 02-March-03, 01:46 AM   #4 (permalink)
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I dont have any probs running XP with 256 ram... most of my games only lose 2-3 FPS vs Win98
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Old 03-March-03, 11:10 PM   #5 (permalink)
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were did that come from?!?!?!?!?! anything above 300w for a standard case is good. if your doin moddin with CC and Fans i would suggest at least 400-450w
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Old 03-March-03, 11:41 PM   #6 (permalink)
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Basically, spend the extra 25 bucks, get a 500w, and never ever have to worry about it again.
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