A technician is sizing a power supply unit (PSU) for a dedicated video editing workstation… — CompTIA A+ (Core 1 & Core 2)

A technician is sizing a power supply unit (PSU) for a dedicated video editing workstation. The workstation features the following components and estimated peak power requirements:
- Dual CPUs: $125\text{ W}$ TDP each
- Dual PCIe Graphics Cards: $165\text{ W}$ TDP each
- Motherboard, RAM, storage drives, and cooling fans combined: $120\text{ W}$

To ensure optimal efficiency and headroom, the technician specifies that total peak system draw must not exceed $70\%$ of the power supply's continuous wattage rating. What is the minimum continuous power supply output rating, in Watts, needed for this system?

Cevap: 1000 W

Cevap

The minimum continuous power supply output rating required is

1000\text{ W}

Summing component power requirements yields

250\text{ W}

for dual CPUs (

2 \times 125\text{ W}

330\text{ W}

for dual GPUs (

2 \times 165\text{ W}

), and

120\text{ W}

for additional peripherals, totaling

700\text{ W}

. To maintain peak system draw at or below

70\%

of maximum PSU output, divide total draw by

0.70

\frac{700\text{ W}}{0.70} = 1000\text{ W}

Adım Adım Çözüm

Calculate total system peak power consumption

700\text{ W}

Sum power draw across dual CPUs (

250\text{ W}

), dual GPUs (

330\text{ W}

), and system peripherals (

120\text{ W}

Calculate minimum PSU rating based on the 70% headroom target

1000\text{ W}

Divide the total power draw of

700\text{ W}

0.70

so that peak draw represents no more than 70% of continuous output.

Anahtar Kavram

Power supply wattage sizing and efficiency headroom calculations

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