A system integrator is configuring a dedicated video rendering workstation. The base syste… — CompTIA A+ (Core 1 & Core 2)

A system integrator is configuring a dedicated video rendering workstation. The base system (CPU, motherboard, RAM, and storage) has a total continuous baseline power requirement of $220\text{ W}$ . The technician installs two identical high-performance GPU accelerator cards, each rated for a peak power consumption of $190\text{ W}$ , alongside a PCIe audio/video capture card drawing $35\text{ W}$ . According to organization guidelines, the power supply unit (PSU) must be sized such that the maximum anticipated peak load does not exceed $70\%$ of the PSU's rated wattage capacity. Which of the following represents the minimum standard rated PSU wattage the technician must install to meet this requirement?

$1000\text{ W}$ Cevap
B
$850\text{ W}$
C
$750\text{ W}$
D
$650\text{ W}$

Cevap

A power supply rated for at least

1000\text{ W}

must be installed.

Summing the peak power draw for all internal hardware yields

220\text{ W} + 2(190\text{ W}) + 35\text{ W} = 635\text{ W}

. Dividing this peak draw by the maximum allowable load factor of

0.70

(

70\%

) requires a minimum power supply rating of approximately

907.14\text{ W}

. The smallest standard wattage tier above this threshold is

1000\text{ W}

Adım Adım Çözüm

Calculate total peak power consumption of all system components.

Baseline (

220\text{ W}

) + Dual GPUs (

2 \times 190\text{ W} = 380\text{ W}

) + PCIe Capture Card (

35\text{ W}

) =

635\text{ W}

total peak draw.

Accurate power sizing requires combining all system loads under maximum operating stress.

Apply the

70\%

maximum continuous load rule to find the minimum required PSU rating.

Minimum PSU Rating =

\frac{635\text{ W}}{0.70} \approx 907.14\text{ W}

The system policy limits peak load to

70\%

of the PSU capacity to ensure thermal efficiency and handle transient voltage spikes.

Select the lowest standard power supply rating that meets or exceeds

907.14\text{ W}

The standard power supply rating that satisfies this threshold is

1000\text{ W}

PSUs are manufactured in standardized wattage tiers (

650\text{ W}

750\text{ W}

850\text{ W}

1000\text{ W}

);

850\text{ W}

would operate at

\approx 74.7\%

load, violating policy.

Anahtar Kavram

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

Tahmini Süre:2m 0s

Soru

Cevap

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