Supermicro PWS-920P-1R2 920W 1U Redundant Power Supply — ETechBuy
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At ETechBuy, we stock this unit for customers who need a reliable, drop-in replacement or a direct upgrade path from the older PWS-920P-1R. Let us walk you through exactly what makes this PSU stand out.
Technical Specifications at a Glance
6 Reasons to Choose the PWS-920P-1R2
80 Plus Platinum — 94% Efficiency
Less heat, lower electricity bills, and more power delivered to your components vs. entry-level PSUs.
Hot-Swap Redundancy (N+1)
Replace a failing unit while the server stays online. Zero planned or unplanned downtime from a PSU failure.
PMBus 1.2 Remote Management
Monitor voltage, current, temperature, and power metrics remotely over the management bus — upgraded from PMBus 1.1 on the older -1R model.
Full Protection Suite
OCP, OVP, short circuit, over temperature, and input under-voltage protection shield your server and its components.
200,000+ Hour MTBF
That is over 22 years of continuous operation. An improvement over the 150,000-hour MTBF of the previous PWS-920P-1R.
Auto-Ranging AC Input
Works across 100–240 V AC without manual voltage switching — ideal for global deployments and mixed rack environments.
PWS-920P-1R2 vs. PWS-920P-1R: What Changed?
The PWS-920P-1R2 is the direct successor to the PWS-920P-1R. Supermicro has officially marked the -1R as "replaced by" the -1R2, and the improvements are meaningful for modern data center deployments.
Pros and Cons
✅ Pros
- Exceptional 94% platinum efficiency
- Hot-swap enables zero-downtime servicing
- PMBus 1.2 for modern IPMI/BMC integration
- Very high MTBF of 200,000+ hours
- Auto-ranging AC supports 100–240 V globally
- Full protection: OCP, OVP, short circuit, thermal
- RoHS and REACH compliant
- Genuine Supermicro certified component
⚠️ Considerations
- 1U-specific — not compatible with 2U+ backplanes
- Requires compatible Supermicro chassis/backplane
- Non-returnable per Supermicro's policy (verify compatibility first)
- Supermicro ecosystem only (card edge connector)
Who Should Buy the PWS-920P-1R2?
Data Center Operators
If you run racks of 1U Supermicro servers, the PWS-920P-1R2's hot-swap capability and PMBus 1.2 integration with your IPMI management stack mean fewer emergency maintenance windows and better real-time power visibility across your infrastructure.
Enterprise IT Administrators
Replacing an aging PWS-920P-1R? This is the certified drop-in upgrade. The improved 94% efficiency will measurably reduce your power bill across a full rack of servers, and the 200,000-hour MTBF gives you greater confidence in long deployment cycles.
High-Availability Application Hosts
For applications where uptime is non-negotiable — databases, financial systems, e-commerce platforms — the N+1 redundancy design means a failed PSU never equals a failed server. Pair two units in a compatible Supermicro 1U chassis and eliminate the PSU as a single point of failure.
Managed Service Providers (MSPs)
Stocking the PWS-920P-1R2 as a spare ensures you can deliver on SLA commitments when a client's server PSU fails. Its hot-swap design means you can service the unit without scheduling a maintenance window.
Ready to Order the PWS-920P-1R2?
In stock and ships fast from ETechBuy — your trusted source for genuine Supermicro server components.
Buy PWS-920P-1R2 at ETechBuy →SKU: PWS-920P-1R2 | UPC: 672042368181 | etechbuy.comFrequently Asked Questions
What does "80 Plus Platinum" mean for the PWS-920P-1R2?
80 Plus Platinum is an energy efficiency certification. The PWS-920P-1R2 achieves 94% peak efficiency, meaning only 6% of drawn AC power is lost as heat. This reduces energy costs and lowers thermal load inside your server chassis.
Is the PWS-920P-1R2 compatible with my existing Supermicro 1U server?
The PWS-920P-1R2 uses a gold finger card-edge (19-pair) connector and is designed for compatible Supermicro 1U systems. Check your chassis documentation or compare with the PWS-920P-1R (which this unit replaces) to confirm backplane compatibility.
Can I hot-swap the PWS-920P-1R2 without shutting down my server?
Yes. The PWS-920P-1R2 supports hot-swap N+1 redundancy. With a second PSU installed, you can remove and replace a failed unit while the server continues running without interruption.
What is PMBus 1.2 and why does it matter?
PMBus 1.2 is a communication protocol that allows your server's BMC or IPMI controller to read real-time data from the power supply — including input/output voltage, current draw, power consumption, temperature, and fan speed. It enables proactive monitoring and alerting before failures occur. The -1R2 upgrade from PMBus 1.1 adds broader command support and better standardization.
What is the MTBF of the PWS-920P-1R2?
The PWS-920P-1R2 has an MTBF (Mean Time Between Failure) of greater than 200,000 hours, which represents a significant improvement over the 150,000-hour MTBF of its predecessor the PWS-920P-1R.
What input voltages does the PWS-920P-1R2 support?
The unit features automatic AC input correction (Active PFC) and works across 100–127 V AC and 200–240 V AC at 50–60 Hz. No manual voltage switching is required, making it suitable for global deployment environments.
Does the PWS-920P-1R2 come with a warranty?
Yes, it includes a 1-year limited warranty. Note that per Supermicro's policy, returns and exchanges must be handled directly through Supermicro. Always verify chassis compatibility before ordering.
Final Verdict
The Supermicro PWS-920P-1R2 is not a power supply you buy hoping it will work — it is one you buy knowing it will. With 94% platinum efficiency, hot-swap N+1 redundancy, PMBus 1.2 management integration, and a 200,000+ hour MTBF, it is the definitive PSU for any mission-critical Supermicro 1U deployment. Whether you are refreshing aging hardware, expanding a rack, or stocking a spare for SLA coverage, this unit delivers where it counts.
Available now at ETechBuy — shop the PWS-920P-1R2 here.
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