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Is this power supply adequade?

N

Northwood3313

n00b
Joined
Mar 18, 2004
Messages
11
Hi guys, I'm looking for some assistance here. Ill list my specs to help you guys answer my question:

-Pentium 4 2.4C overclocked to 3.0ghz
-OCZ 1GB (4x256) PC4000 DDR (when overclocked it goes to 4000)
-Abit IC7-G mobo
-ATI 9800 Pro all in wonder
-Audigy 2
-dvdrom
-DVDRW
-Two 7200RPM 250GB Maxtor SATA 150 HDD's

I currently have a 400 watt antec PSU, Would this be adequade enough for these upgrades? Thanks!
 
It sounds like you already have this comp, so haven't you already used it?

Anyways, 400 watts is more than enough for it. 350 would already be enough.

edit: Yes, I noticed that you left out hard drives. But unless you had something over the top, it's fine.
 
Actually I have most of the parts, just not the rest. What I dont have right now is the ATI card, the DVDRW and the two HDD's (listed below).

Oops..Looks like i left out a major component. Really tired right now, sorry. The other items are

-Two 7200RPM 250GB Maxtor SATA 150 HDD's
 
Originally posted by FLECOM
Power Supplies: How big a PSU do I need?
AGP video card - 20-30W
PCI video card - 20W
AMD Athlon 900MHz-1.1GHz - 50W
AMD Athlon 1.2MHz-1.4GHz - 55-65W
Intel Pentium III 800MHz-1.26GHz - 30W
Intel Pentium 4 1.4GHz-1.7GHz - 65W
Intel Pentium 4 1.8GHz-2.0GHz - 75W
Intel Celeron 700MHz-900MHz - 25W
Intel Celeron 1.0GHz-1.1GHz - 35W
ATX Motherboard - 30W-40W
128MB RAM - 10W
256MB RAM - 20W
12X or higher IDE CD-RW Drive - 25W
32X or higher IDE CD-ROM Drive - 20W
10x or higher IDE DVD-ROM Drive - 20W
SCSI CD-RW Drive - 17W
SCSI CD-ROM Drive - 12W
5400RPM IDE Hard Drive - 10W
7200RPM IDE Hard Drive - 13W
7200RPM SCSI Hard Drive - 24W
10000RPM SCSI Hard Drive - 30W
Floppy Drive - 5W
Network Card - 4W
Modem - 5W
Sound Card - 5W
SCSI Controller Card - 20W
Firewire/USB Controller Card - 10W
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.
Click to expand...

/\ thats in the cool cases FAQ.

that's plenty big.
 
Thanks slick!

Just wondering is there a program which can measure my current watt usage? or some kind of a tool which I can plug into it to measure?
 
That guideline assumes way too much and shouldn't be taken seriously. It neglects to address the varying abilities of power supplies to provide amperages to the major rails. It also fails to consider that the listed devices don't draw from all of the voltage rails evenly at all.

But yes, your current power supply should do the job fine.
 
You definitely dont need anything larger then that Antec 400w PSU for that setup. 350w will handle most mid-high range systems just fine. Wattage rating isn't what you really need to be concerned about anyways. Its the efficiency rating, the actual wattage supported on each rail, how loud the thing is, the quality parts it uses, and how hot it gets. Cheaper PSU's tend to use cheaper parts which in turn get hotter and waste more power. Only buy name brand Antec, Enermax, PC Power and Cooling, FSP Group style power supplies.
 
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