This tiny PSU makes even small-form factor units appear massive

pcgamer.com:

This PSU is absolutely tiny. You could actually run a gaming desktop off this miniscule power supply; it comes with all the cables and connectors required to boot a regular motherboard, CPU, GPU, and SATA drive in a form factor not much bigger than an iPhone.

The HDPlex 250W GaN ATX PSU is just 170 x 50 x 25mm in size, and is a completely passive unit—no doubt why it popped up on our friends at FanlessTech's(opens in new tab) radar. That's sure to be the key to its compact size: there's no 120/80mm fan to force a more square shape or take up precious room.

HDPlex call it «the world's smallest ATX PSU» though I'm not sure what makes it an ATX PSU rather than something else entirely. It offers many of the features you'd expect from a larger ATX PSU, including a few key ones to make sure it doesn't go boom (UVP, OVP, SCP, OPP, OTP).

You're not going to build the most powerful PC with one of these PSUs inside it. With a max output of 250W for a single unit, you'd be hard pressed to actually build a gaming PC with a discrete GPU that wouldn't push it over the limit. It does have a trick up its sleeve to make it that much more worthwhile, however. It is possible to combine two of these PSUs for greater power delivery, up to 500W. That's still some ways off many of the best PSUs for PC(opens in new tab), but high-end GPU demands really are extreme nowadays Lower-end GPUs, like the 130W RTX 3050(opens in new tab), demand much less power.

Now you could build a decent gaming PC with the 500W power budget provided by two of these PSUs. They're so small that two of them wouldn't take up a massive amount of space, either. Perhaps it defeats the purpose a little, as finding a case to fit their strange elongated shape might be a hassle