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Why Power Supply Rating 3000 W but in actual there is only 2771.16 W available?

We have on the Power Supply Rating 3000 W but in actual there is only 2771.16 W available. Can you kindly clarify this abnormality (Initial Rated Power to the Available Actual Supply) with the vendor.

SUPPORT25#sh power

system power redundancy mode = redundant

system power total =     2771.16 Watts (65.98 Amps @ 42V)

system power used =      2128.98 Watts (50.69 Amps @ 42V)

system power available =  642.18 Watts (15.29 Amps @ 42V)

                        Power-Capacity PS-Fan Output Oper

PS   Type               Watts   A @42V Status Status State

---- ------------------ ------- ------ ------ ------ -----

1    WS-CAC-3000W       2771.16 65.98  OK     OK     on

2    WS-CAC-3000W       2771.16 65.98  OK     OK     on

                        Pwr-Allocated  Oper

Fan  Type               Watts   A @42V State

---- ------------------ ------- ------ -----

1    FAN-MOD-09          241.50  5.75  OK

2    FAN-MOD-09          241.50  5.75  OK

                        Pwr-Requested  Pwr-Allocated  Admin Oper

Slot Card-Type          Watts   A @42V Watts   A @42V State State

---- ------------------ ------- ------ ------- ------ ----- -----

2    WS-X6748-GE-TX      325.50  7.75   325.50  7.75  on    on

4    WS-X6748-GE-TX      325.50  7.75   325.50  7.75  on    on

5    WS-SUP720-3B        282.24  6.72   282.24  6.72  on    on

6    WS-SUP720-3B        282.24  6.72   282.24  6.72  on    on

7    WS-X6748-GE-TX      325.50  7.75   325.50  7.75  on    on

8    WS-X6582-2PA        105.00  2.50   105.00  2.50  on    on

1 REPLY
New Member

Why Power Supply Rating 3000 W but in actual there is only 2771.

Hello Shushil,

It's always like that. You will never have a 100% efficient system in real world, where there is no heat dissipation. So the power that you think is missing is actually going out as heat.

Thank you

Sreenivas

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