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Rectangular silver 1U redundant server PSU with rear handle and 24-pin connector

Supermicro

Supermicro PWS-1K21P-1R 1200W 1U redundant server power supply

SKU CH-S7GV-YK46W

1U rack-mountable redundant server power supply delivers 1200 W with 91.1 % efficiency and a 24-pin main connector

  • Single/RedundantRedundant
  • Main Connector24Pin
  • 1200 W redundant output keeps dual-CPU servers running
  • 1 % Gold efficiency lowers rack energy costs
  • 1 U rack-mount form factor fits dense chassis
  • Hot-swap PM board enables zero-downtime maintenance
  • 24-pin main connector supports standard server boards

1200W 1U Redundant Server Power Supply

The Supermicro PWS-1K21P-1R delivers 1.20 kW of output power in a 1U rack-mountable form factor. It is built for servers that require continuous uptime and can accept a redundant power module. The unit carries a Gold-level efficiency rating of 91.1% at typical load.

Redundant Architecture with PM Board

The redundant design allows a second compatible module to share the load and take over instantly if the primary unit fails. An integrated PM board provides monitoring and management functions for the power subsystem. This configuration protects critical workloads against a single point of failure.

Compatibility Checks Before Ordering

Verify that your chassis supports 1U redundant power supplies and includes the correct backplane for the PM board interface. Confirm the motherboard uses a standard 24-pin main connector for power delivery. Ensure the rack depth and mounting rails match the unit's form factor.

Points forts

  • 1200 W redundant output keeps dual-CPU servers running
  • 1 % Gold efficiency lowers rack energy costs
  • 1 U rack-mount form factor fits dense chassis
  • Hot-swap PM board enables zero-downtime maintenance
  • 24-pin main connector supports standard server boards

Caractéristiques

BrandSuperMicro
ModelPWS-1K21P-1R
Single/RedundantRedundant
Main Connector24Pin

Questions sur cet article

Will the 24-pin main connector need replacement during the life of this 1200W unit?

The 24-pin main connector is rated for the full service life of the power supply and does not require scheduled replacement.

What limits continuous output before the 91.1% efficiency protection activates?

The 1.20 kW rated output is the sustained limit; the unit will throttle or shut down if that load is exceeded for an extended period.

How loud is the 1U fan when the supply runs at 1200W all day?

The 1U form factor uses a high-speed fan that remains audible under continuous full-load operation in a rack environment.

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