HPE ProLiant DL20 Gen11 Power Supplies
Genuine HPE Flex Slot power supplies for the HPE ProLiant DL20 Gen11, new and refurbished, tested for compatibility before shipping. The DL20 Gen11 is built for either a single fixed 290W supply or up to two hot-plug Flex Slot supplies; the 290W units are factory-installed only, so the supplies you can buy for this server are the three Flex Slot kits, and the rules for pairing them are simple.
DL20 Gen11 Power Supply Specifications
- Kits listed: HPE 500W Flex Slot Platinum Hot Plug Low Halogen (865408-B21), HPE 800W Flex Slot Titanium Hot Plug Low Halogen (865438-B21), HPE 1000W Flex Slot Titanium Hot Plug (P03178-B21)
- Efficiency, per HPE: 94% single output for the 500W Platinum, 96% for the 800W and 1000W Titanium units
- Redundancy: up to two Flex Slot supplies for 1+1 power redundancy; HPE states a second supply must carry the same part number as the first and that mixing is not supported
- Hot plug: all three are hot-plug, tool-less Flex Slot kits with the common Flex Slot electrical and physical design
- Not sold as parts: the 290W non-redundant supplies, which HPE lists as FIO — only available integrated in the server and not orderable stand-alone
- Cords: each AC supply kit includes a 6-foot IEC C-13/C-14 jumper cord, per HPE; regional cords are a separate item
- Sizing: HPE directs configurations to the HPE Power Advisor; a single-socket server with processors up to 95W, four DIMMs and up to six drives sits comfortably inside the 500W unit
Two of the same part number, chosen once. HPE states a second DL20 Gen11 power supply must carry the same part number as the first and that mixing is not supported, so pick the rating for the heaviest configuration the server will carry and buy two of it. The 290W non-redundant supplies are factory-installed only; the kits sold here are the 500W Platinum, 800W Titanium and 1000W Titanium Flex Slot units.
Which DL20 Gen11 power supply do you need?
| Kit | Rating | Efficiency | Typical fit |
|---|---|---|---|
| 500W Flex Slot Platinum | 500W | 94% | The standard choice for a DL20 Gen11: a 95W processor, four DIMMs, six drives and two adapters are well within it |
| 800W Flex Slot Titanium | 800W | 96% | Higher efficiency at the same footprint; the pick where power cost matters more than kit cost |
| 1000W Flex Slot Titanium | 1000W | 96% | Headroom for a GPU build, or a common part number shared with larger Gen11 servers |
Because the second supply must match the first, the decision is made once: choose the rating for the heaviest configuration the server will ever carry, then buy two of it. On a server this small the 500W kit covers almost every build, and the Titanium units earn their place on efficiency rather than capacity.
Choosing the Right DL20 Gen11 Power Supply
- Two of the same part number. HPE states a redundant second supply must be the same part number as the first and that mixing power supplies is not supported.
- Replace a 290W server's supply with a Flex Slot pair, not a 290W part. The 290W units are factory-only; a server built with one that needs redundancy moves to the Flex Slot kits.
- Size for the GPU if you add one. The NVIDIA RTX A400 and RTX A1000 are the only accelerators listed for this server; if one is planned, run the configuration through HPE Power Advisor before settling on the 500W unit.
- Same kits, other servers. The 500W, 800W and 1000W Flex Slot supplies are the common Gen11 Flex Slot family, which simplifies spares across a mixed fleet.
Complete Your DL20 Gen11 Build
Power sizing on this server is straightforward: one processor up to 95W, four DIMMs, up to six drives and two adapters. See DL20 Gen11 memory, drives, storage controllers and networking adapters, or the full DL20 Gen11 parts listing, which also carries the rail kit. The same Flex Slot kits serve the DL320 Gen11 and the ML30 Gen11; the rest of the range is under HPE ProLiant DL rack server parts, and every model under HPE parts by server model.
DL20 Gen11 Power Supplies FAQ
Which power supplies does the DL20 Gen11 use?
Three HPE Flex Slot hot-plug kits are listed: the 500W Platinum, 800W Titanium and 1000W Titanium. The server takes up to two for 1+1 redundancy. The 290W non-redundant supplies HPE also describes are factory-installed only.
Can I mix two different power supplies in a DL20 Gen11?
No. HPE states that mixing two different power supplies is not allowed and that a second supply ordered for redundancy must have the same part number as the first.
Is 500W enough for a DL20 Gen11?
For most builds. The server has one processor of at most 95W, four DIMMs, up to six drives and two add-in adapters. HPE directs sizing to the HPE Power Advisor, and a configuration with an RTX GPU is the case worth checking there.
Are the DL20 Gen11 power supplies hot-plug?
Yes. All three listed kits are Flex Slot hot-plug supplies with tool-less installation, and HPE lists them as the redundant power supply options for this server.
What is the efficiency of the DL20 Gen11 power supplies?
HPE quotes 94% single-output efficiency for the 500W Flex Slot Platinum and 96% for the 800W and 1000W Flex Slot Titanium kits.
Does the DL20 Gen11 power supply come with a power cord?
HPE states each standard AC power supply option kit includes a 6-foot IEC C-13/C-14 jumper cord. A regional wall cord, if needed, is a separate item.
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