HP ProLiant Power Supply Buying Guide — 460W, 750W, 800W, 1200W, 1600W Common Slot Across Gen8-Gen10
How to pick the right HP power supply for your ProLiant server. Common Slot form factor explained, wattage selection by CPU/GPU/drive load, 80 PLUS efficiency tiers, hot-swap procedure, and the exact part numbers for DL360, DL380, DL580 and ML350 across Gen8, Gen9, and Gen10.
Why HP Power Supply Selection Matters
The wrong HP power supply at best refuses to boot. At worst, it boots but throws iLO warnings, runs the fans at full speed for years, and silently shortens the life of every component in the chassis from capacitor stress.
This guide covers every HP ProLiant Common Slot power supply tier — from the entry 290W up to the 1600W Titanium for DL580 Gen10 — with the actual part numbers you should order for each common upgrade or replacement scenario in 2026.
What is HP Common Slot (CS)?
Common Slot is HP's standardized server PSU form factor introduced with ProLiant Gen8. CS PSUs share identical physical dimensions and connector pinouts so the same physical unit can be reused across DL360, DL380, ML350, DL385, and many more. That dramatically simplifies spares planning for fleets — one spare 750W CS PSU can cover dozens of different server models.
Three rules to remember:
- CS PSUs in a redundant pair must be the same wattage and same model line
- CS PSUs are not cross-compatible across generations — Gen8 CS PSUs do not work in Gen10 servers
- Hot-plug only works in N+1 redundant configurations (two PSUs installed, both healthy)
Wattage Selection by Workload
| Server Load | Recommended PSU | Why |
|---|---|---|
| Single-CPU DL360/DL380 base config | 460W (643954-001) | Cheapest CS PSU. Adequate for a 1× E5-2630, 32 GB RAM, 4× SAS drive config. |
| Single-CPU + GPU or 8+ drives | 750W (643955-001) | Headroom for SAS expanders and add-in cards. Most common DL380 Gen8 PSU. |
| Dual-CPU rack server (DL360/DL380) | 800W Platinum (754381-001 / 865414-B21) | Standard for Gen9/Gen10 dual-Xeon-Scalable. |
| GPU-heavy DL385 / DL380 with multiple GPUs | 1200W (656364-B21 / 660185-001) | Required to redundantly power 2× 250W GPUs plus dual CPUs. |
| Quad-CPU DL580 Gen10 | 1600W Titanium (P05671-B21 / 866730-B21) | Anything less and you cannot redundantly support 4× Xeon Platinum + 6 TB RAM. |
Rule of thumb: size the PSU so that one unit alone can carry full system load with 20% headroom. That way, when one PSU fails the server keeps running at 100%.
80 PLUS Efficiency Tiers Explained
| Tier | Efficiency at 50% Load | Notes |
|---|---|---|
| 80 PLUS Bronze | 82-85% | Found on older Gen5/Gen6 PSUs. Acceptable for non-production use. |
| 80 PLUS Gold | 88-92% | Common in Gen7/Gen8 entry models. |
| 80 PLUS Platinum | 92-94% | HP "Platinum Plus" — most Gen8/Gen9 Common Slot PSUs. |
| 80 PLUS Titanium | 94-96% | Gen10 high-efficiency. Also guarantees 90% efficiency at 10% load. |
For a 750W PSU running a typical 400W server load, going from Gold (~89%) to Platinum (~94%) saves about 22W of waste heat. Across 24/7/365 operation at $0.12/kWh, that is roughly $23 per year per server. Across a 100-server fleet over 5 years, that is $11,500 in electricity savings alone — usually more than enough to justify upgrading PSUs at end-of-life refresh.
DL380 Power Supply Part Numbers Across Generations
DL380 Gen8 (the workhorse — most replaced)
- 460W: 643954-001 — Common Slot Platinum Plus, $128.95
- 460W variant: 511804-001 — Common Slot Redundant, $128.95
- 750W: 643955-001 — Common Slot Platinum, $128.42
- 1200W: 656364-B21 — Common Slot Platinum Plus, $128.42
- 1200W: 660185-001 — Common Slot RPS, $128.42
- 1200W: DPS-1200SB — Delta-built RPS, $128.42
DL380 Gen9
- 500W: 720479-B21
- 800W: 754381-001 (Platinum)
DL380 Gen10
- 500W: 865412-B21
- 800W: 865414-B21 (Platinum)
Hot-pluggable 800W Platinum is the most popular Gen10 PSU. It covers most dual-Xeon-Scalable configs with margin for add-in cards.
DL360 Power Supply Part Numbers
DL360 Gen8
- 460W: 643954-001 (same CS PSU as DL380 Gen8)
- 750W: PS-2751-7C-LF — Common Slot 750W, $128.42
DL360 Gen9
- 500W: 720478-B21
- 800W: 754377-001
DL360 Gen10
- 500W: 865408-B21
- 800W: 865414-B21
DL580 High-Wattage PSUs
The DL580 is HP's quad-CPU enterprise rack server. It demands far more power than the DL360/DL380 line:
- DL580 Gen8: 684532-B21 (1500W Platinum Plus) or 720620-B21
- DL580 Gen10: P05671-B21 (1600W Titanium) or 866730-B21
For DL580 Gen10 configurations with 4× Xeon Platinum 8260 (165W TDP each), 24× DDR4 DIMMs and multiple GPUs, the 1600W Titanium pair is mandatory. A 1500W pair will trip overcurrent protection under sustained load.
ML350 Tower Server PSUs
The ML350 uses the same Common Slot PSUs as the DL380 of the same generation:
- ML350 Gen8: 643955-001 (750W) or 643956-001 (1200W)
- ML350 Gen9: 720479-B21 / 754381-001
- ML350 Gen10: 865408-B21 / 865414-B21
How to Replace an HP ProLiant PSU (Hot-Swap, Zero Downtime)
For redundant N+1 configurations, replacement takes about 5 minutes:
- Identify the failed unit. Solid amber LED on the back panel = critical failure. Flashing amber = predictive failure. Cross-check in iLO under Power & Thermal > Power Supply Health.
- Verify redundancy is healthy. The other PSU must show solid green and be sized for full system load. If the surviving PSU is marginal, schedule a maintenance window — do not hot-swap.
- Remove the failed PSU. Squeeze the orange release tab on the handle and pull straight out.
- Insert the replacement. Slide in firmly until the latch clicks. The fan should spin up immediately. Wait 30 seconds for the iLO handshake.
- Confirm online. Solid green LED on the new unit. iLO should log "Power Supply Inserted" and "Power Supply OK". Power redundancy returns to "OK".
For non-redundant (single PSU) configs, the server must be shut down before replacement.
How to Tell if Your HP PSU is Failing
Symptoms in order of urgency:
- Solid amber LED on PSU rear panel — replace today
- Flashing amber LED — predictive failure, replace within a week
- iLO IML log entries "Power Supply Failure" or "AC Lost"
- Unexpected shutdowns under load (other PSU healthy)
- Fans at full RPM when system is idle (PSU temp sensor issue)
- Audible buzzing or whining from the PSU (capacitor failure imminent)
Don't ignore predictive failure warnings — modern HP PSUs detect capacitor degradation 30-60 days before catastrophic failure. Replacing during a predictive warning costs you 5 minutes; replacing during a hard failure may take down the server if you didn't have N+1.
Buying Refurbished vs New HP PSUs
| Type | Price | Warranty | Best For |
|---|---|---|---|
| New OEM HP | $400-2,500 | 3-year next-business-day | Fresh deployments under HP support |
| Refurbished tested | $90-300 | 1-year | Replacements for out-of-warranty servers |
| Pulled / used | $50-200 | 30-90 day | Lab and dev environments only |
For production servers out of HP warranty, refurbished tested PSUs from a reputable supplier are the sweet spot. Each unit is load-tested before shipping, comes with a 1-year warranty, and costs a quarter of new OEM. For mission-critical workloads, source matched pairs of the same date code where possible.
Common Mistakes to Avoid
- Mixing wattages. Two different wattage PSUs in a redundant pair will cause iLO mismatch warnings and may force one PSU into standby.
- Ignoring 80 PLUS rating differences. A Platinum Plus and a regular Platinum may not be paired in N+1.
- Assuming Gen-cross compatibility. Gen8 CS does not equal Gen10 CS, despite identical-looking form factors.
- Skipping the iLO check after replacement. Always verify "Power Redundancy: OK" in iLO before walking away.
- Buying the cheapest non-HP PSU. Will boot, will trigger persistent warnings, will void warranty, may run fans at higher speed permanently.
Pro Disk Network — HP PSU Stock and Same-Day Shipping
Pro Disk Network stocks 5,100+ HP and HPE power supply models including every Common Slot wattage tier across Gen7 through Gen10, plus Aruba switch PSUs (JL085A, JL086A, JL593A) and ProCurve PoE PSUs (J9828A, JG544A).
All in-stock orders ship same-day from US warehouses. B2B / Net 30 terms available for repeat customers and verified businesses.
Browse HP Power Supplies
- HP Power Supplies — All Models — landing page with 12 featured SKUs
- HP 460W PSUs · HP 750W PSUs
- HP 800W Platinum · HP 1200W Platinum Plus
- HP 1600W Titanium (Gen10)
- DL380 Power Supply · DL360 Power Supply
- DL580 Power Supply · ML350 Power Supply
Related Guides
- Server PSU Replacement Guide (HP / Dell / Lenovo)
- HP Network Adapters Buying Guide (FLR / FLB / FlexFabric)
- HPE Networking hub · Enterprise / B2B Net 30
Need help matching a PSU to your exact ProLiant model? Email sales@prodisknetwork.com with the server SKU (or iLO screenshot showing system info) and we will identify the compatible part numbers within an hour.