CliffEmAll

I am trying to build a little fileserver / CVS server / Postgresql server, and after trying to do what I wanted with old PII-era components, I finally broke down and bought some new equipment off of newegg.

I have an MSI P4MAM-V motherboard, a Celeron 2.4G processor, a single stick of Kingston 128M DDR RAM, a 20G hard drive for the system, 3 40G hard drives in a RAID5 array, and a CD-ROM drive.

With all the devices attached, I get through most of the POST process, but get a "disk read error". If I unhook the power connector from one of my drives, then everything works very nicely, so I am thinking this is a matter of not having enough power. I have tried using a 300W Antec power supply and a 400W Rosewill power supply, and neither seems capable of running everything.

Maybe I am just naive, but it doesn't seem to me like this should be using nearly this much power. I am not running a graphics card, no USB, no firewire, no sound card, its basically a barebones system with a few more IDE devices than normal.

I thought about underclocking the CPU to try to free up more power for other devices, but it seems I cannot set it below the default 100Mhz FSB.

Is there anything I can do here other than lay out another $100 for an enthusiast-level power supply ?

I looked through a listing of typical power requirements, and when adding everything up it seemed my system should have no difficulty running on 250W, but that definitely doesn't seem to be the case.