HDD power usage reduction query

[Chronictank]

Hi all,
I rescently got my ubuntu file server up and running (bar minor niggles), so i think its time to overhaul the ol' main pc.

My current setup is:
1x Western Digital Raptor 150GB WD1500ADFD 10,000RPM SATA 16MB
2x Western Digital Caviar SE16 500GB 5000AAKS SATA-II 16MB running in Raid 0

I was wondering if i would make a energy saving by removing the 2 large disks and replacing them with 2 smaller ones (velociraptors?) to run in raid 0
And 1 drive to act as storage, possibly a samsung/seagate 500gb

Thanks in advance for replies

 

[Chronictank]

sorry i should clarify

The above setup is for my desktop (& gaming) pc, as you say uses a lot of power as it is
I am planning to take out the 2x500GB drives and put them in the server instead/use them for archiving

 

[Chronictank]

drives aren't idle most the time as i understand it as the raid 0 setup usually is the one with the OS on it

i could be wrong though