Rank #9 in Best PC Power Supply 2026: 10 Ranked, and the Specs That Don't Add Up
ASUS ROG Strix 850W Platinum
Price and rating as shown on Amazon when we collected them. Both change.
The ASUS ROG Strix 850W Platinum is an 850-watt ATX power supply from ASUS, listed at £158.99 and placed ninth in this guide. Its Amazon page shows a 4.8 rating from 95 ratings, and 91 of those 95 ratings are five stars. The model name on the listing is ROG-STRIX-850P-GAMING.
The finding here is the spec table disagreeing with the rest of the same page. Under Power Supply Design the listing says Non-Modular, while three of the four customer reviews reproduced on the page describe a modular or fully modular unit with individually braided cables. The same table gives a maximum input voltage of 220 volts AC, with no separate figure for the roughly 230 volts of UK mains. The bullets quote "up to 30%" better efficiency and "up to 45%" better voltage delivery without saying what either is measured against. Everything on this page comes from the Amazon listing as published; we have not tested this power supply ourselves.
How those 95 ratings break down
An average hides its own shape. This is the spread behind the 4.8 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £158.99 |
|---|---|
| Amazon rating | 4.8 out of 5, from 95 ratings |
| Output wattage | 850 watts |
| Power supply design | Non-Modular (as listed) |
| Maximum input voltage | 220 volts AC (as listed) |
| Connector quantity | 4 |
| Item dimensions | 16 x 15 x 8.6 centimetres |
| Item weight | 1.84 kg |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“This modular power supply is a fantastic option for those utilising premium graphics cards and for those searching for a quieter gaming experience. Installing it is simple thanks to its modular design and high quality cables. What is especially impressive for the Asus ROG Strix is it's acoustics. It operates largely silently and has a handy switch on the back allowing the user to switch to a mode which turns off the fan when not required. Overall, this power supply is great value and would suit users with high performance PCs and for those yearning for a quieter gaming experience.”
Verified purchase“The best psu you can buy at the moment. It delivers high end performance with top of the line efficiency and a stable power delivery. The fully modular design makes cable management much easier due to the cables being individually braided and not stiff to work with unlike some other psu brands, the premium build quality is evident. The 0dB fan mode makes it completely silent under low loads, and even under stresst. Perfect for those who are sensitive to sound from their PC, would highly recommend.”
What it is up against
The rivals it was ranked against in Best PC Power Supply 2026: 10 Ranked, and the Specs That Don't Add Up.
Questions people ask
Is the ASUS ROG Strix 850W Platinum a modular power supply?
The spec table says Non-Modular under Power Supply Design, but three of the four customer reviews on the page describe it as modular or fully modular, and one mentions individually braided cables. The listing contradicts itself on this point.
How much does the ASUS ROG Strix 850W Platinum cost?
The Amazon listing shows a price of £158.99 for one unit.
What wattage does the ASUS ROG Strix 850W Platinum deliver?
The spec table lists an Output Wattage of 850 watts, which matches the 850W in the model name ROG-STRIX-850P-GAMING.
What do buyers rate the ASUS ROG Strix 850W Platinum?
It carries 4.8 out of 5 from 95 ratings, and 91 of those 95 ratings are five stars.
What are the input voltage and dimensions of the ASUS ROG Strix 850W Platinum?
The spec table lists a minimum input voltage of 100 volts AC and a maximum of 220 volts AC, with item dimensions of 16 x 15 x 8.6 centimetres and a weight of 1.84 kg. No separate figure is given for the roughly 230 volts of UK mains.
Does the ASUS ROG Strix 850W Platinum run quietly?
The listing cites large ROG heatsinks for lower temperatures and noise and dual ball fan bearings, and the spec table lists one fan with air cooling. Customer reviews on the page mention a 0dB mode switch on the back, though the spec table does not list that switch.
Comments
Reader comments are not checked against the manufacturer's claims above.
No comments yet
Be the first to add something we missed — a price change, a spec that turned out wrong, or how one of these held up.
Leave a comment
No account needed. Own one of these? Tell other readers how it actually performed.