Table 12. Half-Height Servers Per Power Supply Configuration - Dell PowerEdge M1000e Technical Manual

Table 12.
Number of servers with
Power supply
configuration
2+1
2+2
3+0
3+1
3+3
4+1
Any server combination
4+2
5+1
1
With sufficient facility power available
The following information is also applicable for half-height blade servers:

Throttling (performance reduction to conserve power):
220–240V power:
—
2 PSUs — Throttling will occur if heavily configured blades are worked very hard at the
>
same time.
3 PSUs:
>
o 130W processors — Some throttling will occur if heavily configured blades are worked
hard at the same time.
o 95W or 80W processors — Throttling may happen if all servers are run under a very
heavy load.
4 or 5 PSUs — No throttling will occur
>
110V power — Throttling will occur in all power supply configurations if a full set of heavily
—
configured blades are worked hard at the same time.

Prioritized performance — Under throttling conditions, there will be a performance impact on
the lower-priority servers.
Dell recommends you choose which servers are prioritized through CMC's prioritization
—
feature.
Multiple low-priority servers can spread out the impact of prioritization. If all servers are the
—
same priority, they would each experience a slight performance impact as the throttling
would be passed from server to server.

Delayed power-ups — When pushing the limits of the guidelines listed in Table 12, one to three
servers may not be powered on during the initial power-up sequence if all servers were started
simultaneously. The servers may need to be powered on in a second power-up action after the
initial blades go through their post-boot power inventory and allocation.
PowerEdge M1000e Technical Guide
44
Half-height servers per power supply configuration
220–240V power
2700W PSUs
16 light,
13 medium, or
10 heavy
Number of servers with
220–240V power
2360W PSUs
16 light,
11 medium, or
8 heavy
16 light,
16 medium, or
15 heavy
Any server combination
Number of servers with
100–120V power
1
2700W/1350W PSUs
9 light,
4 medium, or
3 heavy
16 light,
8 medium, or
6 heavy
16 light,
13 medium, or
10 heavy
16 light,
16 medium, or
13 heavy