Power Supply (PSU) & ATX 3.1 Transient Calculator

Engineered power supply sizing for 120W CPU + 220W GPU setup with microsecond transient protections.

Parameters & Controls

Quick GPU Presets

CPU Package Power (PL2/PPT)120 W

GPU Power (TGP)220 W

RAM Modules:

NVMe SSDs:

Cooling System:

80 PLUS Efficiency Rating

Daily Gaming Hours:

Daily Idle Hours:

Cost per kWh ($/€):

64-bit IEEE 754

Recommended PSU Wattage

750Watts

Continuous gaming load: 449 W (~60% load ratio)

PSU Load Ratio (50-70% is optimal)60%

Detailed Mathematical Breakdown

Continuous Load DrawCPU (120W) + GPU (220W) + Board/RAM/Storage.

449 W

Estimated Transient Spike (ATX 3.1)1.6x microsecond excursion on GPU power rail.

581 W

Recommended UPS / Battery SizingShields your rig from brownouts and sudden blackouts.

650 VA

Real Wall Power Draw90% Efficiency (80 PLUS Gold (90% ef.)).

499 W

Estimated Electric Bill Cost$125.05/yr at $0.15/kWh (4h game + 4h idle).

$10.45 / mes

Applied Equation (Live Input):

PSU Recomendada (750W) = Carga (449W) ÷ 0.65 (Curva 80 PLUS) | Pico Transitorio: 581W

Direct access to high-intent hardware and game configurations with verified mathematical solutions:

Calculate exact power supply wattage for RTX 4070 Super + Ryzen 7 7800X3D. ~370W continuous draw, ATX 3.1 transient spikes and 750W recommendation.

Calculate power requirements for the highest-end PC: RTX 4090 + Core i9-14900K. Managing 950W transient excursions with ATX 3.1 and PCIe 5.1 12V-2x6.

Calculate power draw for budget champion build: RTX 4060 (115W) with Ryzen 5 5600 (65W). Total continuous draw under 240W.

Yes, a quality 650W ATX 3.1 unit is plenty. For future-proofing higher GPU tiers, 750W or 850W provides comfortable headroom.