MSI MAG A850GLS PCIE5 Power Supply Unit, 850W, 80 PLUS Gold, ATX 3.1, PCIe 5.1 GPU Support, Native 12V-2x6, Dual-color 12V-2x
Reviewed 23 August 2026 · price checked live
Check price on Amazon →Overview
MSI MAG A850GLS PCIE5 Power Supply Unit, 850W sits in our components & replacement parts listings, where we rank by how buyers actually rate a product rather than by brand. The manufacturer says: With 80 PLUS Gold certification (up to 90% efficiency), this PSU is ideal for powering hardware with high energy demands, such as GPUs and CPUs. 2x6 CONNECTOR- Equipped with native 12V-2x6 PCIe connectors, it can deliver up to 600W of power to support PCIe 5.1 GPUs. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.5 out of 5 from 17 ratings. What that score is worth next to its rivals is set out below.
- Brand
- MSI
- Amazon rating
- 4.5 / 5 from 17 ratings
- vs Components & Replacement Parts
- 0.1 below the category median of 4.6
- Rank in category
- 24 of 44 rated components & replacement parts we track
- Price position
- Mid-priced (category spans £4.99 to £625)
- How proven
- Fewer ratings than most rivals here, so less settled
How it compares in Components & Replacement Parts
Across the 44 rated components & replacement parts products we track, the typical score is 4.6 out of 5. This one sits at 4.5, which is around the middle of the category. Ratings alone will not separate it from its rivals here, so price and the specifics below matter more than the star count.
It carries 17 ratings against a category median of 2,596. That is a thin base by the standards of this category, so treat the score as provisional: a handful of extra reviews can still move it either way.
On price it sits in the middle third of a category running from £4.99 to £625, where the midpoint is about £39.99. That is the part of the range where most sensible buys sit, neither cutting corners nor paying for the name.
Worked out from the 44 components & replacement parts products in our catalogue, not from the brand's own claims. How we rank →
Key features
- 80 PLUS GOLD CERTIFIED- With 80 PLUS Gold certification (up to 90% efficiency), this PSU is ideal for powering hardware with high energy demands, such as GPUs and CPUs.
- NATIVE 12V-2x6 CONNECTOR- Equipped with native 12V-2x6 PCIe connectors, it can deliver up to 600W of power to support PCIe 5.1 GPUs.
- DURABLE DESIGN - An LLC half-bridge with DC-to-DC converter and an active PFC design ensure a reliable output (OCP / OTP / OPP / SCP / OVP / UVP / SIP / NLO protection).
- COMPACT SIZE - A compact 150 mm-long and 150 mm-wide ATX form factor ensures a comfortable and easy fit in most PC cases. This frees up more space for cable management and airflow to the rest of the system.
- LOW-NOISE OPERATION - The average sound level is maintained as low as that of a peaceful night. Equipped with a 135 mm Fluid-dynamic bearing (FDB) fan, designed to enhance durability.
