The ASUS ROG Thor 1200W Platinum III White Edition PSU is a high-efficiency power supply for demanding gaming and workstation builds. It combines GaN MOSFET technology, a patented GPU-First voltage stabilizer, and an OLED display to deliver stable power under load, with full ATX 3.1 compliance and support for next-generation graphics cards.

Why This Product

• GaN MOSFET for 30% better efficiency — Delivers up to 30% higher power efficiency than standard MOSFETs while reducing internal size, allowing more space for larger heatsinks and improved airflow.
• ATX 3.1 and PCIe 5.1 ready — Fully compliant with ATX 3.1 standards and includes a 16-pin PCIe cable capable of delivering up to 600 watts to next-gen graphics cards.
• Magnetic OLED display with real-time monitoring — Shows live power draw and swaps magnetically to either side of the unit, accommodating both fan-up and fan-down installations.
• Lambda A++ certified for quiet operation — Emits less than 15 dB of noise on average, earning Cybenetics' top noise certification.
• 80 PLUS Platinum efficiency — Uses low-ESR Japanese capacitors and premium components to achieve industry-leading power efficiency, reducing heat and energy waste.
• 10-year warranty and robust protection — Comprehensive protection against overvoltage, overcurrent, overtemperature, short circuits, and overpower faults across all rails.

At a Glance

Total Output	1200W
Efficiency Rating	80 PLUS Platinum
Noise Level Certification	Cybenetics Lambda A++
Form Factor	ATX12V
ATX Standard	ATX 3.1
Warranty	10 years
Weight	2.37 kg
MTBF	>120,000 hours @ 25°C

Compatibility

• ✓ ATX 3.1 compliant motherboards and next-generation graphics cards (GeForce RTX 50, Radeon RX 9000 series).
• ✓ Includes 16-pin PCIe 5.1 cable for high-power GPU configurations and standard 6+2-pin PCIe connectors for older cards.
• ✓ ATX12V form factor fits standard ATX cases supporting both fan-up and fan-down mounting orientations.
• ✓ AURA SYNC RGB integration allows synchronization with compatible ROG peripherals and components.
• Note: GPU-First intelligent voltage stabilizer requires connection of the IVS cable to activate enhanced voltage sensing.

Best For / Trade-offs

Best for:

• High-end gaming and overclocking builds needing stable power under sustained heavy loads.
• Enthusiasts running multi-GPU systems or demanding workstation applications requiring reliable 1200W capacity.
• Builders prioritizing efficiency and low heat output for compact or poorly-ventilated cases.
• Users seeking quiet operation with a fully passive or low-noise cooling solution.
• Long-term system builders valuing a decade-long warranty and proven reliability metrics.

Trade-offs:

• Budget-conscious builds — this unit commands a premium price for enthusiast-grade features and certification levels.
• Modest or basic systems — 1200W exceeds typical single-GPU or mainstream productivity workloads, adding unnecessary cost.
• Compact ITX cases with tight thermal constraints — the 190 × 150 × 86 mm footprint and high wattage require adequate case ventilation.

Description

ROG THOR 1200W PLATINUM III WHITE EDITION — ULTIMATE POWER. UNMATCHED STABILITY.

The ROG Thor 1200W Platinum III White Edition delivers the ultimate power and stability demanded by gamers. A next-gen GaN MOSFET delivers superior efficiency, and "GPU-First" voltage sensing features a patented-intelligent voltage stabilizer, ensuring top-tier performance and stability. Meanwhile, there is Turbo Mode for maximum cooling when overclocking or for other demanding workloads.

ENGINEERING — GaN MOSFET

The ROG Thor 1200W Platinum III White Edition PSU boasts an innovative GaN MOSFET that deliver up to 30% more power efficiency than standard MOSFETs. Plus, the smaller size of a GaN MOSFET allows for a more organized internal layout. This optimized design provides space for larger heatsinks and enhanced airflow, improving heat dissipation.

ATX 3.1 Compatible

ATX 3.1 ushers in tighter voltage and current regulation standard for next-gen hardware - and the ROG Thor 1200W Platinum III White Edition arrives ahead of the curve with full compliance. A 16-pin PCIe cable capable of sending up to 600 watts of power to PCIe 5.1 graphics cards is bundled with this PSU, readying your build for the next gen.

Cybenetics Lambda A++ Certification — Quietly deviant

On average, ROG Thor 1200W Platinum III White Edition emits less than 15 dB of noise - earning a coveted Cybenetics Lambda A++ certification.

80 PLUS Platinum & Cybenetics Platinum Certification

The ROG Thor 1200W Platinum III White Edition achieves 80 PLUS Platinum and Cybenetics Platinum certifications by leveraging low-ESR Japanese capacitors that deliver stability and efficiency, leading to improved power consumption, heat generation and overall reliability.

"GPU-FIRST" Voltage Sensing with patented intelligent voltage stabilizer (IVS)

Activate the "GPU-First" voltage sensing by connecting the IVS cable.

Magnetic OLED Display

The ROG Thor 1200W Platinum III White Edition also features the signature Thor OLED display, now with magnetic attachment for easy swapping to either side, supporting both fan-up and fan-down installations.

ROG Heatsinks & Fully Aluminum Enclosure

ROG heatsinks and a fully aluminum enclosure synergize for superior cooling, keeping your system thermals under control.

Dual-Ball-Fan Bearings

Dual-ball-fan bearings can last up to twice as long as sleeve bearing designs.

Specifications

General

Brand	ASUS ROG
Model	Thor 1200W Platinum III White Edition
Color	White

Power & Efficiency

Total Output	1200W
80 PLUS Certification	Platinum
Cybenetics Certification	Platinum
AC Input Range	100-240 Vac
+12V Maximum Load	100A
+5V Maximum Load	25A
+3.3V Maximum Load	30A

Technology & Features

Power Conversion	GaN MOSFET
PFC Type	Active PFC
GPU-First Voltage Stabilizer	Patented Intelligent Voltage Stabilizer (IVS)
Cooling Mode	Turbo Mode for overclocking
Fan Bearing Type	Dual-ball-bearing
0dB Fan Button	Yes
OLED Display	Magnetic, swappable
RGB Synchronization	AURA SYNC

Cables & Connectors

PCIe 16-pin Connector	1× (PCIe 5.1 cable, 750mm, 600W capable)
PCIe 6+2-pin Connectors	4×
CPU Power (4+4-pin)	2×
Motherboard Power (24/20-pin)	1× (610mm)
SATA Connectors	7×
Peripheral Connectors	6×

Protection & Reliability

Protection Features	OPP, OVP, UVP, SCP, OCP, OTP
MTBF	>120,000 hours @ 25°C
Warranty	10 years

Physical Specifications

Dimensions	190 × 150 × 86 mm
Weight	2.37 kg
Enclosure Material	Fully aluminum
Noise Level	<15 dB average (Lambda A++)