A 1,050 W power supply meeting the ATX 3.0 standard, with the connector used by recent graphics cards, a ten-year warranty, for €139.90: Cowcotland loaded it to over 700 W. It comes away with the Silver award.
Why ATX 3.0 matters
The latest graphics cards don’t just draw more power: they draw it in spikes.
The ATX 3.0standard, published by Intel in 2022, requires power supplies to absorb the very brief power spikes of recent graphics cards without tripping their protection. It also introduces the 12VHPWR connector: sixteen pins, up to 600 W over a single cable, where two or three PCIe plugs were needed until now.
In 2023, these power supplies are still rare and expensive. The MRR-A 1050 arrives with both, plus a 80 PLUS Gold, fully modular flat cables, and a ten-year warranty — at 139,90 €.
- on the 12 V rail, from 12.26 to 12.17 V above 700 W
- −0.09 V
- at the wall, Ryzen 9 5950X and RTX 3090 Ti
- 730 W
- at the wall, at idle
- 64 W
- at the hottest point, under load
- 35 °C
- price noted by Cowcotland
- 139,90 €
Excellent voltages
Less than 0.1 V of deviation on the 12 V rail above 700 W; the 5 V rail steady at 4.98 V.
Gold-level consumption
What the PC draws at the wall matches the 80 PLUS Gold certification, according to the reviewer.
Every connector
12VHPWR, PCIe 6+2 connectors, two cables for the processor, ten SATA: enough to connect a complete build.
Ten-year warranty
A length usually found on far more expensive power supplies.
One criticism only: the fan under load
At idle, the power supply is "very, very quiet". Under heavy load, its 140 mm fan speeds up and becomes clearly audible — the only entry in the "cons" column, and what keeps it from perfection in the reviewer's view.
What Cowcotland says about it
We don't have much more to add, other than that this MRR-A is a very pleasant surprise.
Aurélien LagnyCowcotland, 25 September 2023 A shame, a real shame that this fan isn't silent under load
Aurélien LagnyCowcotland, 25 September 2023
The MRR-1050AG, in its VP2 version
Its VP2 version moves up to the ATX 3.1 standard and PCIe 5.1, with the same Gold certification and the same ten-year warranty.
MRR-1050AG (VP2) Black
Source
MRED MRR-A 1050 power supply review: ATX 3.0 and 12VHPWR finally affordable??? — Cowcotland, 25 September 2023
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