Dell PowerEdge M1000e Technical Manual page 43

Number of servers with
Power supply
220–240V power
configuration
4+1
4+2
5+1
1
With sufficient facility power available
The following information is also applicable for quarter-height blade servers:

Throttling (performance reduction to conserve power):
220-240V
—
With two PSUs, throttling will occur if heavily configured blades are working very hard at
>
the same time.
With three PSUs and 95W processors, throttling will occur if heavily configured blades are
>
a worked hard.
With three PSUs, and 80W and 60W processors, throttling may occur if servers are run
>
under a heavy load.
With four or five PSUs, no throttling will occur.
>
110V
—
Throttling will occur in all PSU configurations if a full set of heavily configured blades are
>
all worked hard at the same time.

Prioritized performance—Under throttling conditions, there will be a performance impact on
the lower-priority servers.
Dell recommends that you choose which servers those should be through the CMC's
—
prioritization feature.
Multiple low-priority servers would distribute the impact; if all servers were same priority,
—
then they'd 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 number of servers, one to three servers
might not be powered on during the initial power-up sequence if all were started simultaneously,
and may be powered on in a second power-up sequence after initial blades go through their
post boot power inventory and allocation.
Half-height blade servers
Table 12 lists the maximum number of recommended half-height blade servers per power supply
configuration according to the following server configuration definitions:

Light configuration: 1 x 40W processor, 2GB memory

Medium configuration: 2 x 80W processors, 72GB memory

Heavy configuration: 2 x 95W processors, 192GB memory
PowerEdge M1000e Technical Guide
43
2700W PSUs
32 light,
31 medium, or
26 heavy
32 light,
32 medium, or
32 heavy
Number of servers with
220–240V power
2360W PSUs
32 light,
26 medium, or
22 heavy
32 light,
32 medium, or
29 heavy
Number of servers with
100–120V power
1
2700W/1350W PSUs
21 light,
9 medium, or
9 heavy
29 light,
13 medium, or
13 heavy