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Zorluk: OrtaExpansion Cards and Power Supplies

A system integrator is calculating the power requirements for a video rendering workstation. The rated peak power draws for the selected system components are as follows:

- Processor (CPU): 140 W140\text{ W}
- Graphics Processing Unit (GPU): 310 W310\text{ W}
- Motherboard and RAM: 50 W50\text{ W}
- Solid-State Drives and Cooling Fans: 40 W40\text{ W}

To ensure stable operation under full workload and allow for component longevity, the specification mandates a minimum safety headroom of 20%20\% above the total peak power draw. What is the minimum power supply unit (PSU) wattage rating required to satisfy this specification?

  1. A
    450 W450\text{ W}
  2. B
    540 W540\text{ W}
  3. C
    588 W588\text{ W}
  4. 648 W648\text{ W}Cevap

Cevap

The minimum power supply unit rating required is 648 W648\text{ W}.
The correct option is 648 W648\text{ W}. Sizing a power supply requires identifying the total maximum power consumption of all internal components (140 W+310 W+50 W+40 W=540 W140\text{ W} + 310\text{ W} + 50\text{ W} + 40\text{ W} = 540\text{ W}) and applying the required 20%20\% safety overhead (540 W×1.20=648 W540\text{ W} \times 1.20 = 648\text{ W}).

Adım Adım Çözüm

1
Sum the peak power consumption of all system components
Total peak draw = 140 W(CPU)+310 W(GPU)+50 W(Motherboard/RAM)+40 W(Drives/Fans)=540 W140\text{ W} (CPU) + 310\text{ W} (GPU) + 50\text{ W} (Motherboard/RAM) + 40\text{ W} (Drives/Fans) = 540\text{ W}
Before sizing a power supply, the combined baseline electrical load of all installed hardware must be established.
2
Calculate the 20% safety headroom requirement
Safety multiplier = 1.00+0.20=1.201.00 + 0.20 = 1.20
Power supplies operate most efficiently and reliably when not running at 100% capacity continuously.
3
Multiply total peak consumption by the safety factor
Minimum PSU capacity = 540 W×1.20=648 W540\text{ W} \times 1.20 = 648\text{ W}
This establishes the minimum continuous wattage rating required for the power supply unit.

Anahtar Kavram

Calculating Power Supply Unit Wattage and Safety Headroom
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Konular

Expansion Cards and Power Supplies

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