And when I say 75W I mean under LinX load.

The system consists of the following:
Pentium G6950 @ 2.8GHz, 0.94Vcore, 1.05Vtt, 1.0Vgpu.
Gigabyte H55M-USB3
2x1GB of Kingston Value DDR3 @ 6-6-6-24, 1.3V.
40GB X25-V
1TB Seagate 7200.12
RocketRAID 2314 'RAID' card
1050W Enermax Revo85+
This is the system idle.

And the system under LinX load. Assuming 80% efficiency of my PSU, I am using a whopping 6% of its power.
Now I also have another 8 HDD's (1.5TB 7200.11's) that are in an external enclosure. And these are the power figures w/ them on and spinning.
Idle.

LinX load
Not to shabby for a 9 HDD machine.