The PSU on my storage server has gone bye bye, a shop local is selling Cooler Master Elite RS500 500W for £35. Any good? It'd be running : Asus M5A78L-MLX V2 FX4130 6x5.25" HDDs 3x2.5" HDD's 1XSSD Cheers
Old school! Though you could increase capacity by a thousand-fold by replacing them with one cheap 3.5" HDD.
FWIW, got a 450w PSU in my 24 bay server and never had an issue. It peaks upto about 300w during spin-up, 150w when all drives are spinning and 180-200w when active. About 60w idle (Xeon E3-1220L v2 + 3x IBM M1015 cards).