ST-220FUB-05E ReadyNAS 1100, 2100, RNR4000 and RNRX4450 rack mount PSU replacement PSU. Please note your mechanical case may need modifying to accept this power supply with Fan as it is Fan cooled. This is a one size fits all power supply replacement, based on the FSP220-50FGBBI. Power supply has 20 way connector modified for NAS requirement. Motherboard cable length 40 cms. Additional Sata and Molex connectors tied up together for neatness. 80 plus bronze efficiency.
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