Is 400W enough for these?

[jarthel]

35W single-core Celeron (C2D derivative 65nm and hopefully I can upgrade to 65W dual-core CPUs using the same PSU)
matx board with on-board video
2 pieces of DDR2 RAM
1 PCIe 8x SAS RAID card
1 PCIe 1x NIC (the onboard NIC is only up to 100Mbps)
9 HDDs (1 7200rpm and the rest are WD GP drives)

The supply is of redundant type but I'm not sure which type as I haven't received it yet.

Thank you

 

[Dangman]

A GOOD quality 400W PSU with at least 27A on the +12V rail should be enough. So please tell us what PSU you have as soon as you know.

 

[davidhammock200]

9 HDDs (1 7200rpm and the rest are WD GP drives)

If these are not on a staggered spin-up, you may want more +12V amperage, as each HDD can draw up to +12V@3A during spin up.