[YOUR_SUPERIOR]

Do you think that 300W for my case is enough?

I have a Thermaltake Volcano 7+, Thermaltake Active Memory Cooling Kit, 80mm fan at the back....I plan to add a 90mm fan on top, and a card cooler/exhaust

[Da Whip]

You are on the edge. Maybe an upgrade to 400watt to be safe.

[Penguin4x4]

For a speed rig, 375W is the absolute minimum I would run, since you can overclock without causing a PSU fire!
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[xanthan]

until yesterday i was running a duron 1.3 @ 1.42, CDRW, CD, radeon 7500 AIW, SB audigy platinum, 2 lan cards, duel fan cooler master HSF, WD 7200 rpm 60 gig HD, WD 7200 30 gig HD with a 235 watt PSU hehehe. never had a single problem with it.

finally got around to getting a new case with a 340 watt yesterday though

[Robbiem01]

Power supply: How big a PSU do I need?
list complied by RudyG from ttzforums
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

[voodoo5_m@gic]

That means I need 226W - worst case - not too bad! My 300W should be fine then when the AMD chip comes along.

[Penguin4x4]

Really? That low, Robbeim? Hmm, Coppermine 933, 2 64Mb sticks, 1 32mb stick, 48x Creative CD-ROM, floppy, 10Gb 5400 Caviar, NIC, USB Card, ATI AIW PCI, that means I only need 175W to run stable, 200 worst case. 1.2GHz Tually swap should be no prob.
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[JokerHCG]

The only thing about the chart is that thhe stuff isnt additive for the most part. You cant take these values and just add them and get the PSU size you need because of different power distribution at different voltages. I suggest that a 300watt be a minimum for a lite system and a 400watt+ for a "heavier" system. You can get some cheap cases and this one is a particularly good one.
http://www.savingxoom.com/cod60atxmidt.html

[Penguin4x4]

according to the chart I should be around 117.5W. So, 200 should be fine.
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[1Time]

I'd say go with at least a 350w PSU even if a 300w would work. Of course a 400w would be better. It's better to run a bigger PSU at a lower percentage of it's capacity than to run a smaller one closer to its full capacity.

[Gregory_WE]

It's not that expensive to go from 300-350 or 400 so I'd just play it safe and go with the larger PSU.