System information

Dell
PowerEdge M1000e Technical Guide 31
The following information is also applicable for half-height blade servers:
 Throttling (performance reduction to conserve power):
o 220–240V power:
 2 PSUs—Throttling will occur if heavily configured blades are worked very hard
at the same time.
 3 PSUs:
 130W processors—Some throttling will occur if heavily configured blades
are worked hard at the same time.
 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.
o 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.
o Dell recommends you choose which servers are prioritized through CMC’s prioritization
feature.
o 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 11, 1–3 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.
Dell recommends that all customers running a power-hungry configuration should install the modular
iDRAC firmware 3.02 upgrade, which contains the following enhancements:
 Improved calculation for power budgeting to enable more servers to be powered up
simultaneously.
 Functionality to enable iDRAC to retry power up for blade servers automatically in the event
that some servers do not power up initially due to the pre-boot power inventory.
5.2.6.2 Full-height Blade Servers
0 lists the maximum number of recommended half-height blade servers per power-supply
configuration according to the following server definitions:
 Light configuration: 2 x 95W processor, 4 DIMMs
 Medium configuration: 4 x 105W or 2 x 130W processors, 16 DIMMs
 Heavy configuration: 4 x 105W or 2 x 130W processors, 32 DIMMs