Rank #3 in Best PC Power Supply 2026: 10 Ranked, and the Specs That Don't Add Up
MSI MAG A850GL PCIE5 850W 80 Plus Gold Modular
Price and rating as shown on Amazon when we collected them. Both change.
The MSI MAG A850GL is the third entry in our guide to PC power supplies. It is an 850 Watt, fully modular, ATX 3.0 unit with 80 PLUS Gold certification, listed at £94.99 with a rating of 4.5 out of 5 from 938 reviews.
The figure worth checking on this listing is the input voltage. The spec table gives a minimum of 207 Volts (AC) and a maximum of 240 Volts (AC) — a narrow window, but one that covers the roughly 230V UK mains, which is the opposite of the problem elsewhere in this guide. The same table also lists a "Connector Quantity" of 1, while the bullet text describes a fully modular unit with ATX and PCI Express connector types and a native 16-pin PCIe connector rated to feed up to 600W to a graphics card; a single connector cannot be both. The fan is the one place where text and table agree: 120 mm in the bullets, 120 Millimetres in the spec table. Everything on this page comes from the Amazon product listing, not from testing we carried out ourselves.
How those 938 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £94.99 |
|---|---|
| Rating | 4.5 out of 5, from 938 reviews |
| Output Wattage | 850 Watts (as listed) |
| Input Voltage Range | 207–240 Volts (AC) (as listed) |
| Connector Quantity | 1 (as listed) |
| Fan Size | 120 Millimetres (as listed, and the same as the 120 mm fan named in the bullets) |
| Item Dimensions | 14 x 15 x 8.6 centimetres |
| Item Weight | 2.5 kg |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“I bought this MSI MAG A850GL to power my new upgrade (running a brand new RTX card), and it has been flawless.A great surprise was that although the description mentioned PCIe 5.0, the unit I received actually comes with the updated PCIe 5.1 standard, including the safer 12V-2x6 cable instead of the older fire hazard cables from previous gen.Despite being a compact unit, it delivers a solid 850W, and the new cable made cable management in my case a breeze without needing ugly adapters. It runs incredibly quiet, the build quality feels premium, and it handles heavy gaming loads without a single hiccup.Highly recommended if you want a reliable, future-proof, and compact powerhouse!”
Verified purchase“The MSI MAG A850GL is a high-quality, fully modular, 80 Plus Gold-rated PSU, and this is actually the second one I've bought. I originally purchased one for my own Corsair FRAME 4000D build and was very pleased with it, so I bought the same model again for the kids' AM4 gaming rig in a Corsair 3500X case.The 850W capacity is more than enough for the mid-range systems we're running, with an NVIDIA RTX 5060 / AMD RX 9060 XT, B550 motherboard and Ryzen 7 5700X. The PSU fan is whisper quiet and certainly isn't audible above the case fans in either of our builds.Being fully modular is a big plus, as you only need to connect the cables you actually require. In our case that's the motherboard, CPU, PCIe and a single Molex cable for the fan controllers. MSI also provides a useful storage bag for the spare cables, which keeps everything together for future upgrades.The all-black PSU and cables look smart and, in both of our cases, the PSU is largely hidden anyway, so there's no need to pay extra for fancy sleeved cables unless you specifically want them.Price is another strong point. I paid £76 for this one and £85 for the first. Prices do fluctuate, so it's worth keeping an eye on deals and comparing the 750W and 850W versions — when I bought this one, the 850W model was actually cheaper than the 750W.Overall, I'm very happy with it. It offers plenty of power, quiet operation, fully modular cabling and a Gold efficiency rating at a very reasonable price. It also compares very favourably with the Corsair and be quiet! options in the same price range. Having bought two now, I'd have no hesitation recommending it.”
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
What is the MSI MAG A850GL's output wattage?
The listing gives an Output Wattage of 850 Watts, and repeats it under Wattage as 850 watts.
What input voltage does the MSI MAG A850GL accept?
The spec table gives a Minimum Input Voltage of 207 Volts (AC) and a Maximum Input Voltage of 240 Volts (AC).
How many connectors does the MSI MAG A850GL have?
The spec table lists a Connector Quantity of 1. The bullet text, by contrast, describes a fully modular unit with ATX and PCI Express connector types and a native 16-pin PCIe connector rated to supply up to 600W to a PCIe 5.0 graphics card.
What fan does the MSI MAG A850GL use?
The bullets describe a 120 mm fluid dynamic bearing fan, and the spec table's Fan Size is also 120 Millimetres.
What warranty comes with the MSI MAG A850GL?
The bullet text states that the MAG gaming power supply comes with a 7-year limited MSI warranty.
How much does the MSI MAG A850GL cost and how is it rated?
The listing price is £94.99, with a rating of 4.5 out of 5 from 938 reviews.
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