Power Supply
MSI MAG A850GL PCIE5 850W 80+ Gold
● In Stock
Price on enquiry · Message us for today’s quote
Modern graphics cards do not draw power smoothly. They spike — briefly, sharply, well above the figure printed on the box — and a supply that cannot ride those out drops the machine mid-game for no reason you can see on screen. This unit is built to the ATX 3.1 specification, which exists specifically to define how much of that behaviour a supply has to absorb. 850W of Gold-rated output, a native 12V-2×6 cable, fully modular.
Key Specs
Output — 850W
Efficiency — 80 PLUS Gold
Standard — ATX 3.1, PCIe 5.1 ready
GPU cable — Native 12V-2×6, no adapter
Cabling — Fully modular
Best for — RTX 5070 Ti and 5080 builds
Warranty — Full manufacturer warranty
What It Pairs With
This is the bracket for a 5070 Ti or 5080 next to a Ryzen 7 or Core Ultra 7 — cards in that range are exactly the ones whose spike behaviour the standard was written around. Give it a case with a floor intake so the unit breathes cool air rather than recycling what the graphics card has already warmed. Use the native 12V-2×6 cable rather than adapting an older connector, because every extra junction in that run is one more place for resistance and heat to turn up.
Who This Isn’t For
A machine running integrated graphics or a modest card never produces the transient behaviour this unit is engineered around, so you would be buying protection against an event your hardware does not generate. At the other end, 850W is a comfortable size for the cards named above and an uncomfortable one past them — spike tolerance does not manufacture headroom that is not there, and a supply asked to work near its ceiling every session is not a saving.
Common Questions
What actually is a transient spike?
A very short surge, over in a fraction of a second, when the graphics card’s load jumps suddenly. During it the card can pull far more than its rated figure. It never shows up in the wattage on the box, which is why supplies get blamed for faults they did not cause.
My PC restarts itself during games. Is the power supply the cause?
Often, yes — a supply that cannot absorb spikes trips its own protection and the machine reboots with nothing in the logs. Send us your full parts list and what you were doing when it happened and we will help you work out whether that is what you are seeing.
Is 850W enough for a 5080?
With a mainstream processor alongside it, yes, and that is what this unit is sized for. With a processor being pushed hard as well, the margin gets thinner — send both parts and we will give you the real number rather than a rule of thumb.
Send your graphics card and processor with the enquiry and we will confirm the wattage bracket including headroom for spikes, and check the housing length against your case. Availability confirmed at time of quote.