I was upgrading a Catalyst 4506-E power supplies from 2 - 2800W 220v with a single 220 connection for each power supply and going to 2 - 4200W 220v with 2 - 110v connections for each power supply. Now my available wattage is lower than the 2800W power supplies.... why? Here are the outputs of a switch with 2800W power supplies and a switch with the new 4200W power supplies. Notice the switch with the smaller power supplies has a maximum available wattage of 2800 while the switch with the larger power supplies only has a max of 2100. Why is it less? Is it because the 2800 has 1 - 220v connection and the 4200 has 2 - 110v connections?
4503#show power
Power Fan Inline
Supply Model No Type Status Sensor Status
------ ---------------- --------- ----------- ------- -------
PS1 PWR-C45-2800AC AC 2800W good good good
PS2 PWR-C45-2800AC AC 2800W good good good
Power supplies needed by system : 1
Power supplies currently available : 2
Power Summary Maximum
(in Watts) Used Available
---------------------- ---- ---------
System Power (12V) 480 1360
Inline Power (-50V) 645 1400
Backplane Power (3.3V) 0 40
---------------------- ---- ---------
Total 1125 2800
Module Inline Power Summary (Watts)
(12V -> -48V on board conversion)
---------------------------------
Maximum
Mod Used Available
--- ---- ---------
1 64 175
--- ---- ---------
********************************************************************************
********************************************************************************
4506-E#show power
Power Fan Inline
Supply Model No Type Status Sensor Status
------ ---------------- --------- ----------- ------- -------
PS1 PWR-C45-4200ACV AC 4200W good good good
PS1-1 110V good
PS1-2 110V good
PS2 PWR-C45-4200ACV AC 4200W good good good
PS2-1 110V good
PS2-2 110V good
Power supplies needed by system : 1
Power supplies currently available : 2
Power Summary Maximum
(in Watts) Used Available
---------------------- ---- ---------
System Power (12V) 610 709
Inline Power (-50V) 1351 1450
Backplane Power (3.3V) 0 40
---------------------- ---- ---------
Total 1961 (not to exceed Total Maximum Available = 2100)
Thanks,
Mike
