A network administrator is assembling a virtualization host server containing multi-port n… — CompTIA A+ (Core 1 & Core 2)

A network administrator is assembling a virtualization host server containing multi-port network adapter expansion cards and high-speed storage accelerators. The host system components exhibit the following peak power requirements under full load:

- Processor (CPU): $190\text{ W}$ peak draw
- Quad-port 10GbE PCIe expansion card: $35\text{ W}$
- PCIe NVMe storage accelerator card: $75\text{ W}$
- Motherboard, memory modules, and cooling system: $110\text{ W}$ constant
- Solid-state drive array (4 drives total): $10\text{ W}$ combined constant

To ensure operational stability and maintain peak efficiency, company guidelines require that the total peak power consumption does not exceed $75\%$ of the Power Supply Unit (PSU) maximum rated wattage output.

What is the minimum power supply capacity, in Watts ( $\text{W}$ ), required for this server configuration?

Cevap: 560 W

Cevap

The minimum power supply capacity required is

560\text{ W}

The total peak power draw of all components is

190\text{ W} + 35\text{ W} + 75\text{ W} + 110\text{ W} + 10\text{ W} = 420\text{ W}

. Since the system must not exceed

75\%

(

0.75

) of the PSU's total capacity, the required capacity is

\frac{420\text{ W}}{0.75} = 560\text{ W}

Adım Adım Çözüm

Sum the maximum peak wattage of all individual components to determine total peak system power draw.

Total peak draw =

190\text{ W} + 35\text{ W} + 75\text{ W} + 110\text{ W} + 10\text{ W} = 420\text{ W}

Accurate power sizing requires considering peak power consumption rather than average or idle draw.

Divide the total peak system draw by the maximum allowed load percentage (

0.75

Calculated minimum capacity =

\frac{420\text{ W}}{0.75} = 560\text{ W}

Restricting continuous peak system draw to

75\%

of rated PSU capacity leaves a

25\%

operating headroom, maintaining power conversion efficiency and avoiding overload shutdowns.

Anahtar Kavram

Power supply unit (PSU) wattage calculation and safety headroom planning

Tahmini Süre:2m 0s

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