650+ server power supplies in stock. Hot-swap redundant PSUs for Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and IBM servers. 495W to 2400W with Platinum and Titanium efficiency ratings. Complete replacement guide with compatibility tables, troubleshooting, and data center power planning. Delivery across Egypt and MENA.
Server Power Supply Types
Hot-Swap Redundant PSUs
Standard enterprise power supplies designed for zero-downtime replacement. Pull the failed unit, slide in the new one — no server shutdown required. All our PSUs are hot-swap compatible with their respective server chassis. Enterprise servers use 1+1 redundancy by default: two identical PSUs share the load, and if one fails, the other takes 100% of the load instantly. Some high-density servers support 2+2 redundancy for additional protection.
Non-Redundant PSUs
Single PSU configurations found in tower servers, entry-level rack servers, and workstations. These require a full shutdown for replacement. Common in Lenovo ST550 single-PSU configs, Dell T340/T440 base configs, and HPE ML350 single-PSU builds. Not recommended for production environments.
Efficiency Ratings
| Rating | Efficiency at 50% Load | Annual Waste per PSU (1kW) | Best For | Typical Servers |
|---|---|---|---|---|
| 80+ Bronze | 82–85% | ~1,300 kWh wasted | Entry-level, cost-sensitive | Older/entry servers |
| 80+ Silver | 85–88% | ~1,050 kWh wasted | Standard enterprise | Mid-range servers |
| 80+ Gold | 87–90% | ~875 kWh wasted | Standard enterprise (most common) | Dell R640/R740, HPE DL360/DL380 Gen10 |
| 80+ Platinum | 90–94% | ~525 kWh wasted | High-density data centers | Dell R750/R760, HPE DL380 Gen10+/Gen11 |
| 80+ Titanium | 94–96% | ~350 kWh wasted | Maximum efficiency, hyperscale | Latest generation flagship configs |
Cost impact of efficiency: In a 100-server data center, upgrading from Gold to Platinum PSUs saves approximately 35,000 kWh per year. At Egypt commercial electricity rates, that translates to measurable annual savings while reducing cooling load.
Dell PowerEdge PSU Compatibility by Generation
Dell uses proprietary PSU form factors that change between server generations. Using the wrong PSU will not physically fit or will not be electrically compatible. The following table maps every common Dell server generation to its compatible power supplies.
| Generation | Server Models | PSU Wattages | Form Factor | Common Dell PNs | Notes |
|---|---|---|---|---|---|
| 11th Gen | R610, R710, R510 | 502W, 717W, 870W | Dell 11G standard | C502A-S0, A717P-00, A870P-00 | EOL but parts available. 6-pin power connector. |
| 12th Gen | R620, R720, R720xd, T620 | 495W, 750W, 1100W | Dell 12G standard | N24MJ (495W), 6W2PW (750W), GYH9V (1100W) | Same form factor shared across all 12G rack servers. |
| 13th Gen | R630, R730, R730xd, T630 | 495W, 750W, 1100W | Dell 13G standard | N24MJ (495W), HTRH4 (750W), YT39Y (1100W) | Same physical form as 12G. Some PNs cross-compatible. Verify revision. |
| 14th Gen | R640, R740, R740xd, R940, T640 | 495W, 750W, 1100W, 1400W, 1600W, 2000W, 2400W | Dell EPP (Extended Power Performance) | GRTNK (750W), W0CTF (1100W), 8M0RR (1600W), K4PJW (2400W) | New EPP form factor. NOT compatible with 12G/13G. Wider wattage range for GPU configs. |
| 15th Gen | R650, R750, R750xs, R750xa, T550 | 600W, 800W, 1100W, 1400W, 1800W, 2400W | Dell 15G EPP | X8V2G (800W), JWTW3 (1100W), 04X44V (1400W) | Updated EPP. Some 14G/15G PSUs share form factor — verify compatibility matrix. |
| 16th Gen | R660, R760, R760xs, R760xa | 700W, 1100W, 1400W, 1800W, 2400W | Dell 16G EPP | Varies by configuration | Latest generation. Titanium efficiency available. Check Dell support site for exact PN. |
Browse our full Dell data center parts inventory.
HPE ProLiant PSU Compatibility by Generation
| Generation | Server Models | PSU Wattages | Form Factor | Common HPE PNs | Notes |
|---|---|---|---|---|---|
| Gen8 | DL360p, DL380p, DL380e, ML350p | 460W, 750W, 1200W | HPE Common Slot (CS) | 656362-B21 (460W), 656363-B21 (750W), 684532-B21 (1200W) | Common Slot introduced. Some cross-compat with Gen9. |
| Gen9 | DL360, DL380, DL560, ML350, BL460c | 500W, 800W, 1400W | HPE Common Slot (CS) | 720478-B21 (500W), 720479-B21 (800W), 720620-B21 (1400W) | Same CS form factor as Gen8. Higher efficiency models available. |
| Gen10 | DL360, DL380, DL560, ML350 | 500W, 800W, 1000W, 1200W, 1600W | HPE Flex Slot | 865408-B21 (500W), 865414-B21 (800W), 865412-B21 (1000W) | New Flex Slot form factor. NOT compatible with Gen8/Gen9 Common Slot. Hot-plug. |
| Gen10+ | DL360, DL380, DL380a | 500W, 800W, 1000W, 1600W | HPE Flex Slot (updated) | P38995-B21 (500W), P38997-B21 (800W), P39385-B21 (1600W) | Same Flex Slot as Gen10. Some PSUs cross-compatible — verify PN. |
| Gen11 | DL360, DL380a, DL560 | 800W, 1000W, 1600W, 2400W | HPE Gen11 Flex Slot | Varies by configuration | Latest generation. Titanium efficiency available. Check HPE PartSurfer. |
Browse our full HPE data center parts inventory.
Lenovo ThinkSystem PSU Compatibility
| Server Models | PSU Wattages | Form Factor | Notes |
|---|---|---|---|
| SR630 / SR630 V2 / SR630 V3 | 750W, 1100W | Lenovo 1U standard | V1 and V2 share PSUs. V3 uses updated form factor. |
| SR650 / SR650 V2 / SR650 V3 | 750W, 1100W, 1800W | Lenovo 2U standard | Higher wattage for GPU configurations. |
| SR850 / SR860 | 1100W, 1800W | Lenovo 2U/4U high-power | 4-socket servers. Multiple PSU bays (2+2 or 3+1). |
| ST550 / ST558 | 450W, 750W, 1100W | Lenovo tower | Tower form factor. Optional redundant PSU. |
Browse our full Lenovo data center parts inventory.
PSU Failure Symptoms: What Happens Before a PSU Fails
Power supplies rarely fail without warning. Recognizing early symptoms can prevent unexpected downtime.
| Symptom | What It Indicates | Urgency | Action Required |
|---|---|---|---|
| PSU fan running at maximum speed constantly | Internal temperature rising due to degraded components or dust buildup | Medium | Clean air vents. If noise persists, order replacement PSU. |
| Amber/orange LED on PSU | PSU has detected an internal fault or is operating outside spec | High | Replace immediately. The other PSU is carrying full load alone. |
| Intermittent server reboots or unexpected shutdowns | PSU unable to deliver stable voltage under peak load | Critical | Check iDRAC/iLO power logs. Replace PSU. Verify wall power is stable. |
| Voltage warnings in management console (iDRAC/iLO) | PSU voltage rails drifting outside acceptable range (12V, 3.3V, 5V) | High | Replace PSU before complete failure. Voltage drift causes component damage. |
| PSU efficiency dropping (higher power draw for same workload) | Internal capacitor degradation (capacitor aging) | Medium | Monitor via PDU/UPS. Plan replacement during next maintenance window. |
| Clicking or buzzing noise from PSU | Failing capacitors or coil whine from degraded inductors | High | Replace immediately. Clicking capacitors can fail catastrophically. |
| Event log: “Power supply redundancy lost” | One PSU has failed. Server running on single PSU. | Critical | Replace failed PSU immediately. Single PSU = no redundancy = single point of failure. |
PSU Replacement Procedure: Step by Step
Replacing a hot-swap PSU is one of the simplest server maintenance tasks, but following the correct procedure prevents mistakes.
Step 1: Identify the Failed PSU
Check the server management console (Dell iDRAC, HPE iLO, Lenovo XClarity). The failed PSU will show an amber LED on the front panel. Note the exact PSU slot (PSU 1 or PSU 2) and the part number from the label on the PSU.
Step 2: Verify the Replacement PSU
Confirm the replacement PSU matches: same wattage, same form factor, and same voltage input range. Both PSUs in a redundant pair MUST be identical wattage. Mixing wattages causes the server to operate in non-redundant mode or throttle performance.
Step 3: Hot-Swap Procedure (No Shutdown Required)
- Disconnect the power cable from the failed PSU.
- Press the release latch on the PSU handle.
- Slide the PSU straight out of the chassis. It requires moderate force — do not twist or angle.
- Slide the new PSU into the same bay until you hear the latch click.
- Connect the power cable to the new PSU.
- Wait 10–15 seconds for the PSU to initialize. The LED should turn green.
Step 4: Verify in Management Console
Check iDRAC/iLO/XClarity to confirm:
- New PSU is detected and showing “OK” status
- “Power supply redundancy restored” event in log
- Both PSUs showing green LED
- No voltage warnings or faults
Step 5: Cable Management
Route the power cable properly through the cable management arm (if installed). Use Velcro ties, not zip ties, for power cables — zip ties cannot be adjusted without cutting. Ensure the cable is not kinked, stretched, or resting on sharp edges. Use proper server power cables rated for the PSU amperage.
Data Center Power Planning
Proper power planning prevents overloaded circuits, tripped breakers, and the catastrophic scenario of losing an entire rack due to insufficient power infrastructure.
PDU Types
| PDU Type | Features | Best For | Price Range |
|---|---|---|---|
| Basic PDU | Power distribution only. No monitoring. | Small setups, labs, dev environments | $ |
| Metered PDU | Total power draw display. SNMP monitoring. | Standard data center racks | $$ |
| Switched PDU | Per-outlet on/off control. Remote power cycling. | Remote management, colocation | $$$ |
| Intelligent PDU | Per-outlet metering + switching. Environmental sensors. | Enterprise data centers, capacity planning | $$$$ |
Circuit Sizing Guide
| Circuit Type | Voltage | Amperage | Max Safe Load (80%) | Typical Use |
|---|---|---|---|---|
| Single-phase 20A | 208V | 20A | 3,328W (16A usable) | 2–4 standard servers |
| Single-phase 30A | 208V | 30A | 4,992W (24A usable) | 4–8 standard servers |
| Three-phase 30A | 208V 3Φ | 30A | 8,640W (24A usable) | Full rack, standard density |
| Three-phase 60A | 208V 3Φ | 60A | 17,280W (48A usable) | High-density rack, GPU servers |
Critical rule: Never load a circuit beyond 80% of its rated capacity. The remaining 20% is the safety margin for inrush current during server power-on and for UPS transfer events.
Total Rack Power Budgeting
To calculate total rack power needs:
- Sum the maximum PSU wattage of all servers in the rack (use nameplate rating, not typical draw)
- Add networking equipment power (switches, PDUs themselves draw power)
- Add 20% headroom for growth and inrush
- Divide by circuit capacity to determine number of circuits needed
- Multiply by 2 for A+B redundant power feeds
UPS Integration and Runtime Calculation
UPS sizing must account for the actual power draw of all PSUs in the rack, not just the nameplate rating.
| UPS Sizing Factor | Calculation | Example |
|---|---|---|
| Total server power draw | Sum of actual power consumption (not PSU nameplate) | 10 servers × 500W actual = 5,000W |
| UPS VA rating needed | Total watts ÷ power factor (typically 0.9) | 5,000W ÷ 0.9 = 5,556 VA → 6 kVA UPS minimum |
| Runtime at full load | Battery capacity (Wh) ÷ load (W) | 3,000 Wh ÷ 5,000W = 36 minutes |
| Recommended headroom | UPS should be loaded at 60–70% for optimal battery life | 5,000W load → 7–8 kVA UPS recommended |
Important: UPS batteries degrade over time. A UPS that provided 15 minutes of runtime when new may provide only 5–8 minutes after 3 years. Test runtime annually and replace batteries proactively.
Common PSU Replacement Mistakes to Avoid
| Mistake | Consequence | Prevention |
|---|---|---|
| Installing wrong wattage PSU (e.g., 750W + 1100W) | Server enters non-redundant mode. May throttle CPU. iDRAC/iLO reports mismatch warning. | Both PSUs MUST be identical wattage. Verify part number before ordering. |
| Using wrong generation PSU (e.g., 12G PSU in 14G server) | Will not physically fit or will not be recognized by the server. | Check generation compatibility table above. Dell 14G EPP is different from 12G/13G. |
| Ignoring cable management after replacement | Loose cables can disconnect during rack maintenance. Cables can block airflow. | Use cable management arms and Velcro ties. Route cables away from airflow paths. |
| Not verifying PSU status after installation | PSU may be physically installed but not recognized due to connector issue. | Always check management console. Wait for green LED and “redundancy restored” event. |
| Using consumer/desktop PSU in server chassis | Wrong connector, wrong voltage rails, no hot-swap capability, fire hazard. | Only use OEM server PSUs. Enterprise PSUs have specific connector and pin-out designs. |
| Ignoring efficiency rating when replacing | Lower efficiency PSU wastes more power as heat, increasing cooling costs. | Replace with same or higher efficiency rating. Platinum is the current standard. |
Why Buy Server PSUs from ICD in Egypt?
- 650+ PSUs in stock — Dell, HPE, Lenovo, IBM power supplies
- All wattages — 495W to 2400W from one supplier
- Genuine units — OEM power supplies with proper efficiency ratings
- Emergency replacement — Fast availability for failed PSU situations. A dead PSU means your server is running without redundancy.
- Complete accessories — Power cables, cooling fans, and management accessories
- All generations — From Dell 11th Gen to 16th Gen, HPE Gen8 to Gen11
- Fast delivery — Cairo, Egypt and MENA-wide shipping. Browse our data center parts inventory.
Frequently Asked Questions
Can I replace a server PSU without shutting down?
Yes, if your server has redundant (1+1) PSUs and both were operational before the failure. Enterprise servers are designed for hot-swap PSU replacement. Disconnect the power cable from the failed PSU, slide it out, slide in the replacement, and reconnect the cable. The server continues operating on the remaining PSU throughout the process.
Can I mix different wattage PSUs in the same server?
No. Both PSUs in a redundant pair must be identical wattage. If you install mismatched PSUs, the server will either operate in non-redundant mode (only using one PSU), report a configuration error, or throttle CPU and memory performance. Always replace with an exact match.
Are Dell PSUs compatible with HPE servers?
No. Dell, HPE, and Lenovo each use proprietary PSU designs with different physical form factors, connectors, and pin-outs. A Dell PSU will not physically fit in an HPE chassis and vice versa. Always match the PSU to the exact server brand and generation.
How do I find the right PSU part number for my server?
Three methods: (1) Check the label on the existing PSU for the part number. (2) Enter your server service tag on Dell Support, HPE PartSurfer, or Lenovo Parts Lookup. (3) Contact ICD with your server model and we will identify the exact replacement PSU. Our presales team confirms compatibility before you order.
How long do server PSUs last?
Enterprise server PSUs typically last 5–10 years under normal operating conditions. The main failure mechanism is electrolytic capacitor aging, which is accelerated by heat. PSUs in well-cooled data centers (below 25 degrees C) last longer. After 5 years, monitor PSU health through the server management console and consider proactive replacement for mission-critical systems.
What is the difference between Platinum and Titanium efficiency?
80 PLUS Platinum PSUs operate at 90–94% efficiency at 50% load. 80 PLUS Titanium achieves 94–96% efficiency. The difference matters in large data centers: across 100 servers drawing 5kW each, Titanium saves approximately 20,000 kWh per year compared to Platinum. For small deployments (under 10 servers), the cost premium of Titanium rarely pays back.
My server PSU LED is amber but the server is still running. What should I do?
An amber LED means the PSU has detected a fault. The server is running on the remaining healthy PSU only — you have lost redundancy. This is an urgent situation: if the second PSU fails, the server shuts down immediately. Order a replacement PSU immediately and install it as soon as it arrives. Do not wait for the server to fail.
Request a Quote for Server Power Supplies
Send us the server model or failed PSU part number — we will match the exact replacement and provide pricing. 650+ PSUs in stock with same-day dispatch.
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