ASUS ROG Thor 850W Platinum II power supply: features and specs

The ASUS ROG Thor 850W Platinum II is a fully modular desktop power supply with an OLED screen that shows how much power the PC is drawing. It is built for high-end gaming systems, with an 80+ Platinum certification, a quiet fan and sleeved cables.

What 850W and 80+ Platinum mean

The wattage is the most power the unit is designed to deliver. A system draws far less than the maximum most of the time, so the useful question is whether the total peak load of your parts sits comfortably under 850W. A graphics card and processor's manufacturer figures are a good starting point.

The 80 Plus Platinum certification is about efficiency. Platinum units are tested to convert a high share of the power from the wall into usable power for the PC at typical loads, which means less wasted heat. ASUS says it uses 100% Japanese capacitors and other premium components to reach this level.

Cooling and noise

The power supply has a 135mm Axial-tech fan with PWM control. ASUS says the fan design gives lower noise while keeping temperatures in check. ROG heatsinks cover critical components to reduce temperatures and noise.

The listing mentions a 0dB mode. In general, this means the fan stays off at low loads, so the unit makes no fan noise until the PC needs more cooling. The Lambda A++ certification is a noise-level certification; ASUS cites it to say the unit stays quiet.

The OLED power display

A small OLED screen on the unit monitors power draw in real time. This is handy for seeing how much your system uses when idle compared with gaming. ASUS also describes it as customizable, and the unit works with Aura Sync, so lighting effects can be matched to other compatible hardware.

Fully modular, sleeved cables

Fully modular means every cable detaches from the unit, including the main motherboard cable. You connect only the cables you need, which reduces clutter and helps airflow in a compact case. ASUS lists sleeved cables, which look neater and are typically easier to route.

Warranty and size

The listing states a 10-year warranty. The unit measures about 6.2 x 5.9 x 3.4 inches (roughly 157 x 150 x 86 mm) and weighs 4.1 lb (about 1.9 kg).

Who it suits

It suits people building or upgrading a high-end gaming PC who want a quiet, modular unit with live power monitoring and RGB-compatible styling. If you don't need those features, a plain unit with the same wattage and efficiency class would work equally well for power delivery.

What to check before you buy

• Your power need: add up the rated power of your graphics card, processor and drives, and leave headroom.
• Connectors: check that the modular cables include the connectors your graphics card and motherboard need, such as 12VHPWR if your card uses it.
• Case fit: confirm your case takes a standard ATX power supply and has room for the cables.
• Lighting software: if you want the lighting sync, confirm your other parts support Aura Sync.
• Cable use: use the supplied cables only, since modular cables from different brands are not interchangeable.

The short version

• 850W, fully modular, 80+ Platinum power supply.
• 135mm Axial-tech PWM fan, ROG heatsinks and a 0dB mode.
• OLED display that shows power draw in real time.
• Sleeved cables and Aura Sync compatibility.
• 10-year warranty, per the listing.

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