HPE ProLiant ML350e Gen8 Power Supplies
Genuine HPE Common Slot hot-plug power supplies for the HPE ProLiant ML350e Gen8, new and refurbished. Read this before ordering one: the tower ships with a single 460W non-hot-plug, non-redundant supply, and HPE states the Redundant Enablement Kit is required for any Common Slot power supply — so on a factory-standard machine the kit is part of the order, not an accessory to it.
ML350e Gen8 Power Supply Specifications
- Standard supply: one 460W non-hot-plug, non-redundant power supply, alongside two non-hot-plug, non-redundant system fans
- Common Slot options: 460W and 750W Platinum Plus hot-plug kits, rated at up to 94% efficiency with support for HPE Intelligent Power Discovery
- Required kit: the HPE Redundant Enablement Kit (664046-B21), which HPE lists as required for any Common Slot power supply, for redundant fans, and whenever a Registered DIMM is purchased
- Redundancy: optional 1+1 redundant supplies, through the Common Slot power supply option kits
- Cooling: two fans ship standard and the chassis supports up to four; the redundant fans need the same enablement kit
- Mixing: not supported — every supply inside one server must be exactly the same model, and Gold, Platinum and Platinum Plus units cannot be mixed
A Common Slot supply is not a drop-in on this tower. The ML350e Gen8 ships with one 460W non-hot-plug, non-redundant supply, and HPE lists the Redundant Enablement Kit 664046-B21 as required for any Common Slot power supply. The same kit is what enables redundant fans, so read it as part of the order rather than an accessory to it.
460W or 750W, and what else does the order need?
| Part | What it is | When it applies |
|---|---|---|
| 460W Common Slot Platinum Plus | Hot-plug supply, up to 94% efficient | One processor on the standard drive cage |
| 750W Common Slot Platinum Plus | Hot-plug supply, up to 94% efficient | Two processors, added drive cages, PCIe cards |
| Redundant Enablement Kit | Chassis enablement kit | Required for either supply, and for redundant fans |
Sizing is the easy half of this decision. The harder half is that adding a second power supply to a standard ML350e Gen8 is a conversion rather than an addition: the enablement kit goes in first, then two matching Common Slot supplies, because the 460W unit the tower was built with is neither hot-plug nor redundant. HPE publishes a Power Advisor for sizing a specific configuration, and a tower that has gained a second processor or a second drive cage is where 750W earns its price.
Choosing the Right ML350e Gen8 Power Supply
- Order the enablement kit alongside the supply. HPE lists 664046-B21 as required for any Common Slot power supply here, so a supply on its own may not be a complete upgrade.
- Matching means the same model, not just the same wattage. Two 460W units are still a mismatch if their efficiency ratings differ; HPE says mismatched supplies produce errors and the operation fails.
- Redundancy is two supplies, not one. A 1+1 configuration needs a matched pair; a single Common Slot unit in an enabled chassis is hot-plug but not redundant.
- The same kit buys fan redundancy. Two non-hot-plug fans ship standard and the chassis supports four.
- A six-bay LFF cage assumes it too. HPE lists the redundant power supply option alongside a Smart Array controller as a requirement for that cage.
Complete Your ML350e Gen8 Build
Power draw follows the processors and the drive count — see ML350e Gen8 processors and drives before sizing a supply, and memory for the other place the enablement kit is required. Also available: ML350e Gen8 storage controllers and networking adapters, or the full ML350e Gen8 parts listing. Background reading: how to fix excessive fan noise in HPE ProLiant servers. Other models are indexed under HPE parts by server model.
ML350e Gen8 Power Supplies FAQ
What power supply does an ML350e Gen8 ship with?
One 460W non-hot-plug, non-redundant supply, together with two non-hot-plug, non-redundant system fans. Hot-plug Common Slot supplies and redundant fans are both options.
Do I need the Redundant Enablement Kit?
For any Common Slot power supply on this server, yes - HPE lists part 664046-B21 as required. The same kit is also what enables redundant fans and is called for whenever a Registered DIMM is purchased.
Can I mix power supplies in an ML350e Gen8?
No. HPE states that all supplies inside a server must be exactly the same model, and that Gold, Platinum and Platinum Plus units cannot be mixed. Mismatched supplies produce errors rather than running at the lower rating.
Should I choose 460W or 750W?
460W suits a single-processor tower on its standard drive cage. 750W is the sensible choice once a second processor, an additional drive cage or several PCIe cards are in the machine.
How many fans does an ML350e Gen8 have?
Two non-hot-plug, non-redundant fans ship as standard, and the chassis supports up to four. Redundant fans require the Redundant Enablement Kit.
What is Intelligent Power Discovery?
An HPE feature that creates an automated, energy-aware link between the server and the facility's power infrastructure. The Common Slot Platinum Plus supplies listed for this tower support it.
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