HP 720479-B21 800W Flex Slot Platinum Hot Plug Power Supply

800W Flex Slot Platinum Power Supply

This 800 watt hot-plug power supply kit is built for HPE ProLiant DL300 Gen9 servers. It delivers 80 Plus Platinum certified efficiency up to 94 percent, reducing power waste in data centre racks. The Flex Slot form factor is 25 percent smaller than previous designs, freeing space for additional server options. It suits administrators who need redundant, high-efficiency power in a dense chassis.

Tool-less hot-plug installation

The module slides into the Flex Slot bay without tools and locks with a built-in latch, so failed units can be swapped while the server stays online. Alignment tabs guide the connector, preventing bent pins during rapid replacement. The only common issue is inserting the unit upside-down in low-light racks; the keyed notch prevents damage but forces a re-seat. No cables or screws are required, keeping service time to seconds.

Sustained 94 percent efficiency under load

At continuous 800 watt output the supply maintains its Platinum rating, keeping heat output and fan speed lower than lower-rated units. The 25 percent smaller chassis still moves enough air for steady operation in fully populated DL300 Gen9 bays. Efficiency drops only marginally above 80 percent load, so power draw stays predictable during prolonged compute peaks. It is not for builds that need 1400 watt capacity or non-Flex-Slot chassis.