2.5" HDD in desktop to save power?

flushfire

Distinguished
Jul 9, 2008
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18,510
Do you think it's worth it? I'm planning to setup an Internet Cafe with 20 desktop PCs which will be mainly for gaming (Dota 2, LoL & MMOs). I've ruled out diskless for now so please don't tell me to go that way. Main concerns are the price of the HDD and power savings. Maybe heat and durability as well. Size and speed isn't much of a concern as MOBAs and MMOs aren't the most demanding anyway. 2.5" are currently cheaper here, e.g.

WD Caviar Blue 3.5" 500gb Sata3 $50
WD Scorpio Blue 2.5" 500gb $48
WD Scorpio Blue 2.5" 320gb $41

Based on specs and benchmarks I've read online and a local power/cost calculator I can (theoretically) save around $6-7 a month on my bill for 12 hours of constant use each day. It'll probably be smaller in practice, although the price difference is IMO already significant. Should I be concerned about the slower performance? Is there some other factor I'm not seeing? Thank you very much in advance for any insights you can offer :)