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PSU configuration

Refer to the following section for more information on the PSU configurations.

PSU support matrix​

When building a DW612 Enclosure solution, it is required to validate the power requirements for your configuration using the latest version of the Power Configurator to ensure that the number of power supplies selected are adequate for supporting your chassis configuration. The Power Configurator tool can be found at Lenovo Capacity Planner website.

CAUTION
Failure to validate the configuration with the Power Configurator tool could result in system errors, failure to power on, or microprocessor throttling, and limiting system's ability to leverage all the microprocessor performance.
Note
The tables below are based on nodes with all DIMM slots, PCIe slots, and hard disk drives populated.
Table 1. SD650 V2 trays with DW612 enclosure

Six power supply configuration

Nine power supply configuration2

PSU Capacity

1800W

2400W

Power Policy

N+1 with OVS1, N=5 Non-redundant, N=6

N+1 redundant without OVS1, N=8

CPU with TDP smaller or equal to 205W

Fully populated

Fully populated

Fully populated

CPU with TDP greater than 205W

Up to 5 trays

Fully populated

Fully populated

Table 2. SD650-N V2 trays with DW612 enclosure

Six power supply configuration

Nine power supply configuration

PSU Capacity

2400W

Power Policy

N+1 with OVS1, N=5 Non-redundant, N=6

N+1 redundant without OVS1, N=8

400W GPUs

Fully populated3

Fully populated

500W GPUs

Partially populated4

Fully populated

Note

  1. OVS (Oversubscription) of the power system allows for more efficient use of the available system power.

  2. When fully populated with SD650 V2 trays, only six power supplies are needed to provide N+1 redundancy.

  3. Follow the best practices in Best Practice for six SD650-N V2 nodes with 400W GPU running in a DW612 enclosure equipped with six 2400 W power supplies to ensure peak performance through optimal settings. Some versions of High Performance Linpack may cause the system or GPUs to throttle when best practices are not followed.

  4. The number of trays supported depends on the power capacity of the enclosure. Use Lenovo Capacity Planner (LCP) to estimate the power capacity of the enclosure, see Lenovo Capacity Planner website.

Upgrading to nine PSU configuration​

If the enclosure comes with six power supply units along with three fillers for reserved power supply bays, the SMM2 could be upgraded to allow the enclosure to support nine power supply units.

See the instructions in Nine PSU upgrade plan.