Supermicro
Supermicro PWS-1K21P-1R 1200W High Efficiency Redundant Power Supply
Best redundant power supply for mission-critical enterprise server environments.
The Supermicro PWS-1K21P-1R is a 1200W high-efficiency redundant power supply designed for enterprise-level reliability. Its (1+1) redundant configuration ensures continuous operation by automatically switching to a backup unit if the primary fails, preventing system downtime. Integrated PMBus technology offers advanced digital monitoring and control, crucial for optimizing server performance and energy efficiency in demanding data center or workstation environments. This power supply is an essential component for maintaining system continuity and efficient power delivery.
$153.09
Owner Satisfaction
4.7
/ 5
Category Rank
28
/ 1062
#28 in Computer Power Supplies
Price vs Category Average
-84%
Below average
Power Output
1200
/ W
Who it's for
- IT managers maintaining mission-critical server uptime
- Data center operators focused on reducing long-term energy costs
- System administrators integrating hardware into existing Supermicro infrastructure
Who should skip it
- Office workers requiring a quiet, noise-sensitive computing environment
- DIY builders seeking compatibility with standard desktop cases
- Budget-conscious buyers prioritizing low upfront hardware costs
Performance breakdown
Redundancy Reliability
The (1+1) failover system provides near-instant protection against critical power loss.
Energy Efficiency
80 Plus Platinum certification ensures minimal power waste during heavy server loads.
Monitoring Precision
Integrated PMBus technology offers granular, real-time data for proactive system management.
Build Integrity
Industrial-grade construction designed specifically for the rigors of enterprise server environments.
Output Stability
Delivers consistent 1200W power to keep demanding hardware running without interruption.
Installation Compatibility
Tailored specifically for Supermicro chassis, ensuring a seamless and secure fit.
Key Specs
Power Output
1200W
Configuration
(1+1) Redundant
Management Interface
PMBus support
Weight
Approximately 3.0 kg
Efficiency Rating
80 Plus Platinum
Protection Features
Over Voltage Protection
Modularity Type
Non-Modular
Wattage Output Watts
1200.0
Features
- Ensures uptime with automatic (1+1) redundant failover
- Advanced power monitoring via PMBus
- High-efficiency operation minimizes energy waste
- Designed for Supermicro server chassis
- Reliable 1200W continuous power output
- Supports critical system continuity
What customers say
Customers consistently praise the exceptional reliability of the Supermicro PWS 1K21P 1R, noting its critical role in maintaining uptime for demanding server environments. The consensus highlights the robust build quality and high efficiency, confirming its status as a dependable workhorse. Users appreciate the seamless redundancy feature, which provides peace of mind and minimizes operational risk. While the initial investment is significant, the long term stability and reduced failure rates solidify its strong value proposition within the enterprise hardware space. This unit is viewed as essential infrastructure.
Know before you buy
This configuration means the power supply consists of two modules working in tandem. If one module fails, the other immediately takes over the full load, preventing your server from shutting down unexpectedly.
No, this unit is specifically engineered for Supermicro server chassis. You should verify your specific chassis model number against the compatibility list before purchasing to ensure a proper physical and electrical fit.
PMBus allows your server to communicate directly with the power supply to monitor real-time metrics like voltage, current, and temperature. This data helps you optimize energy efficiency and proactively identify potential power issues before they cause a failure.
Yes, it carries an 80 Plus Platinum rating. This indicates that the unit is highly efficient at converting AC power to DC, which reduces wasted energy and lowers heat output in your server environment.
The unit includes built-in protection features, most notably Over Voltage Protection. This safeguards your sensitive server components by cutting or regulating power if the input voltage exceeds safe operating limits.
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