Replacing an AC power supply

Use these instructions to install an AC power supply in the NeXtScale n1200 Enclosure. You can install an AC power supply while the NeXtScale n1200 Enclosure is powered on.

Important

• Use only power supplies of the same power rating or wattage in each chassis.
• Make sure the input power is phase-to-phase, or, phase-to-neutral, 100 to 127 volt AC nominal, 50/60 Hz for low-line; or 200 to 240 volt AC nominal, 50/60 Hz for high-line power supplies.
• For 900-watt power supplies, if operating at low-line Vin (AC 100V - 127V), the power output can only be up to 600-watt. Up to 900-watt if operating at high-line Vin (AC 200V - 240V).
• You can only use 1300-watt power supplies with high-line Vin (AC 200V - 240V).
• Make sure that the power cord is not connected to the power supply when you install the power supply in the chassis.
• Do not remove the velcro strap from the rear of the power supply.

The following tables provide an indication of the quantity of nodes that can be installed in a chassis for specific processor types assuming nodes have all DIMM slots, PCIe slots, and hard disk drives populated. The tables are based on 900-watt or 1300-watt power supplies and the indicated power settings. However, when building a NeXtScale n1200 Enclosure solution, you are 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. 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 of the microprocessor performance. The Power Configurator tool can be found at Lenovo Power Configurator download site.

Table 1. Compute nodes supported (high-line AC input, with 900-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	12	12	12	12
	2	12	12	11	12
60	1	12	12	12	12
	2	12	12	10	12
70	1	12	12	12	12
	2	12	12	8	11
80	1	12	12	11	12
	2	12	12	8	9
95	1	12	12	10	12
	2	12	12	6	10
115	1	12	12	8	10
	2	12	10	5	8
130	1	12	12	7	9
	2	10	8	4	7

Note

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

Table 2. Compute nodes supported (low-line AC input, with 900-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	12	12	9	11
	2	12	12	6	10
60	1	12	12	7	9
	2	12	9	5	7
70	1	12	12	7	9
	2	12	9	5	7
80	1	12	12	6	8
	2	10	9	5	7
95	1	12	11	6	7
	2	9	7	4	6
115	1	11	9	5	6
	2	7	6	3	5
130	1	9	8	4	5
	2	6	5	3	4

Note

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

Table 3. Compute nodes supported (high-line AC input, with 1300-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	12	12	12	12
	2	12	12	12	12
60	1	12	12	12	12
	2	12	12	12	12
70	1	12	12	12	12
	2	12	12	12	12
80	1	12	12	12	12
	2	12	12	12	12
95	1	12	12	12	12
	2	12	12	10	12
115	1	12	12	12	12
	2	12	12	8	12
130	1	12	12	12	12
	2	12	12	7	11

Note

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

Table 4. Compute nodes + two 130-watt² GPUs supported (high-line AC input, with 1300-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	6	6	6	6
	2	6	6	6	6
60	1	6	6	6	6
	2	6	6	6	6
70	1	6	6	6	6
	2	6	6	6	6
80	1	6	6	6	6
	2	6	6	6	6
95	1	6	6	6	6
	2	6	6	5 + 1 microprocessor node	6
115	1	6	6	6	6
	2	6	6	5	6
130	1	6	6	5 + 1 microprocessor node	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node

Note

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

Table 5. Compute nodes + two 225-watt² GPUs supported (high-line AC input, with 1300-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	6	6	5 + 1 microprocessor node	6
	2	6	6	5	6
60	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
70	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
80	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
95	1	6	6	4 + 2 microprocessor node	6
	2	6	6	4	5
115	1	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
	2	6	6	3 + 1 microprocessor node	4 + 1 microprocessor node
130	1	6	6	4 + 1 microprocessor node	5
	2	6	6	3 + 1 microprocessor node	4 + 1 microprocessor node

Note

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

Table 6. Compute nodes + two 235-watt² GPUs supported (high-line AC input, with 1300-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	6	6	5 + 1 microprocessor node	6
	2	6	6	4 + 1 microprocessor node	6
60	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
70	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
80	1	6	6	5	6
	2	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
95	1	6	6	4 + 2 microprocessor node	5 + 1 microprocessor node
	2	6	6	4	5
115	1	6	6	4 + 1 microprocessor node	5 + 1 microprocessor node
	2	6	6	3 + 1 microprocessor node	4 + 1 microprocessor node
130	1	6	6	4	5
	2	6	6	3 + 1 microprocessor node	4

Note

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

Table 7. Compute nodes + two 300-watt² GPUs supported (high-line AC input, with 1300-watt power supply x6).

Six column table documenting the microprocessor SKU, # of microprocessor(s), non-redundant or N+1 with OVS, N=5, N+1 redundant, N=5, N+N redundant, N=3, and N+N redundant with OVS, N=3.

Microprocessor SKU (W)	# of micro- processor(s)	Non-redundant or N+1 with OVS1, N=5	N+1 redundant, N=5	N+N redundant, N=3	N+N redundant with OVS1, N=3
50	1	6	6	4 + 2 microprocessor node	5 + 1 microprocessor node
	2	6	6	4	5
60	1	6	6	4	5
	2	6	6	3 + 2 microprocessor node	4 + 2 microprocessor node
70	1	6	6	4	5
	2	6	6	3 + 2 microprocessor node	4 + 2 microprocessor node
80	1	6	6	4	5
	2	6	6	3 + 2 microprocessor node	4 + 2 microprocessor node
95	1	6	6	4	4 + 2 microprocessor node
	2	6	6	3 + 1 microprocessor node	4 + 1 microprocessor node
115	1	6	6	3 + 2 microprocessor node	4 + 2 microprocessor node
	2	6	5 + 1 microprocessor node	3	3 + 2 microprocessor node
130	1	6	6	3 + 2 microprocessor node	4 + 1 microprocessor node
	2	6	5 + 1 microprocessor node	3	3 + 2 microprocessor node

Note

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

1300-watt and 1500-watt power supply supportability

The following table provides the 1300-watt and 1500-watt power supply supportability to have better performance and power efficiency.

Table 8. 1300-watt and 1500-watt power supply supportability.

Four column table documenting the quantity of 1300-watt power supplies, non-redundant, N+1 redundant, and N+N redundant.

Quantity of 1300-watt power supplies	FPC power bank
	Non-redundant	N+1 redundant	N+N redundant
2	Support		Non-support
3
4
5
6			Support

Note

When setting power redundancy policy through FPC after nodes are powered on, it is possible that the current power bank is not sufficient to allow N+1 or N+N configuration. Remove some or all of the nodes or lighten nodes configuration before the redundancy policy can be applied.

To install a power supply, complete the following steps.

Figure 1. Installation of power supplies

1. Grasp the power-supply handle and slide the power supply into the bay until it locks in place.
2. Connect the power cord to the power supply:
   1. Loosen the velcro strap that is attached to the power-supply, but do not remove it.
   2. Align the power cord with the power-supply handle; then, secure the cord to the handle with the velcro strap.
   3. Loop the power cord connector around and connect it to the power supply.
      Figure 2. Power supply cord strain relief
      
      
   4. Push the power cord back through the strain-relief ties to remove excess cable from the loop.