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ASUS ROG Strix 1200W Platinum Power Supply: features, specs and fit
A fully modular 1200W ATX 3.1 power supply with 80 Plus Platinum certification, PCIe 5.1 support, GaN MOSFETs and a 10-year warranty. What the specs mean.
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The ASUS ROG Strix 1200W Platinum is a power supply unit (PSU) for desktop PCs. It converts wall power into the lower voltages that the motherboard, processor, graphics card and drives need. At 1200 watts and with current-generation connectors, it is aimed at high-end gaming and workstation builds. The listing gives few details beyond its headline specifications, so this page explains what those mean.
What the headline specs mean
ASUS lists the unit as fully modular, 80 Plus Platinum certified, ATX 3.1, PCIe 5.1, with GaN MOSFETs and GPU-First IVS, backed by a 10-year warranty. The model number is 90YE00W0-B0NA00.
Fully modular cables
On a fully modular supply, every cable detaches from the unit, including the main motherboard cable. You connect only the cables your build needs, which typically means less clutter, easier airflow and simpler cable routing. Check which cables are included in the box.
80 Plus Platinum efficiency
80 Plus is a certification of how efficiently a supply converts AC wall power to DC power at set load levels. Platinum is one of the higher tiers, and certified units typically waste less energy as heat. Less wasted heat can also mean the fan works less hard, though actual noise depends on the design and the load.
ATX 3.1 and PCIe 5.1
ATX 3.1 is an updated PC power standard, and PCIe 5.1 refers to the matching specification for powering graphics cards. In general, this generation is meant to support modern high-power graphics cards that use the 12V-2x6 connector, and to handle short power spikes better. If you plan to use a recent high-end graphics card, check which connector it needs and whether a native cable is included.
GaN MOSFETs and GPU-First IVS
ASUS names two internal design features. GaN (gallium nitride) MOSFETs are a type of switching component that typically handles power conversion with less loss than older silicon parts. GPU-First IVS is ASUS's term for its input-voltage sensing layout; ASUS publishes the details of how it works, so consult its documentation for specifics.
Size and weight
The unit measures 6.3 x 5.9 x 3.4 inches (about 16 x 15 x 8.6 cm) and weighs 4.9 lb (about 2.2 kg). That fits the standard ATX power supply size most mid-tower and full-tower cases accept.
Who it suits
It suits builders of high-performance desktops, particularly those planning a power-hungry graphics card or room to add components later.
What to check before you buy
- Total power need: add up your processor and graphics card requirements and confirm 1200W is appropriate.
- Case fit: confirm your case takes a standard ATX supply of this length.
- Graphics card connector: check whether your card uses 8-pin PCIe connectors or the newer 12V-2x6 cable.
- Cables: confirm the number and type of connectors in the box.
- Wall supply: check that your outlet and local electrical codes suit a unit of this size, and follow the manual during installation.
- Warranty: read the 10-year warranty terms on the ASUS site.
The short version
- 1200W, fully modular PC power supply from ASUS ROG.
- 80 Plus Platinum certified, ATX 3.1 and PCIe 5.1.
- GaN MOSFETs and GPU-First IVS design.
- 10-year warranty, standard ATX size, 4.9 lb.
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