What is the best way to determine the right power supply. My sister's power supply went out but it was only a 200 and i believe she needed more than that as she was running A DVD, disk drive, hard drive, Maxtory 10 gig on a clone computer. Unsure of anything else, computer is a clone. Thanks.

My system had only a 145W power supply ! I have a new 300W waiting for me to install it. However , I just am not having any ill effects from the current P.S. Yesterday I copied/burned a CD from the DVD-ROM to the CD-RW and it worked fine. I cant remember where ,however I found this list that tells you how much power each device pulls when in use. You can add up these # to see where you stand . IMHO , I would think replacing the current P.S. with at least a 250W , and it should be more than enough ? Good Luck ,Nick

Correction (My system has a 145W power supply) Sorry,Nick

That's not that much for a 200W. If you get a new one get a 250W if that's all she has running on it.

The price difference is so small I would get at least a 300 .You may want to upgrade someday

Power requirements Component Requirement Line(s) Used High-wattage AGP card 20-50W +3.3V Average PCI card 5W +5V Cached SCSI controller PCI card 20-25W +3.3V and +5V Floppy drive 5W +5V 10/100 NIC 4W +3.3V 50x Atapi CD-ROM 10 - 25W +5V and +12V 12x Atapi DVD-ROM 10 - 25W +5V and +12V 12x / 10x / 40x SCSI CD-R/RW 20W +5V and +12V SCSI CD-ROM 12W +5V and +12V RAM 8W per 128MB +3.3V Ultra2 SCSI PCI card 5W +3.3V and +5V 7200rpm IDE hard drive 5 - 15W +5V and +12V 7200rpm Ultra2 SCSI hard drive 24W +5V and +12V 10,000rpm SCSI drive 10 - 40W +5V and +12V Motherboard (without CPU or RAM) 20 - 30W +3.3V and +5V Typical Pentium II 30W +5V 1GHz Pentium III 34W +5V 1.7GHz Pentium 4 65W +12V 1.4GHz AMD Athlon 70W +12V hopefully this is readable

Thanks, think she will go with the 300W. Strongly suspect power supply was not enough, DVD/rom always ran warm to touch.