Wednesday, May 25th 2022

HDPlex Intros World's Smallest ATX PSU

HDPlex announced what it claims to be the world's smallest ATX power supply. Measuring 170 mm x 50 mm x 25 mm, this internal PSU is smaller than most 100 W-class laptop power-bricks, but packs a surprising 250 W of power output that's sufficient for most HTPC builds. The PSU uses highly efficient GaN FETs in its switching circuitry, to achieve its power density, with the company claiming 94% efficiency.

The PSU comes with a discrete AC receptacle on one end, and connectors for modular cabling, on the other. Cables include 24-pin ATX, 8-pin EPS, three SATA power, one Molex, and two 6+2 pin PCIe power connectors. 250 W not enough? There's a unique feature that lets you sync two of these into a single unit, by combining their AC inputs through a Y-splitter, and an ATX signal cable.
The underside of the PCB reveals the automotive-grade GaN FETs (automotive-grade implies high thermal tolerance). The next picture shows how you can combine two of these for a total of 500 W power, and still end up with a smaller footprint than FlexATX or SFX. HDPlex is pricing this at USD $145 a piece.
Source: FanlessTech
Add your own comment

23 Comments on HDPlex Intros World's Smallest ATX PSU

#1
tabascosauz
Tis a shame I already went with their 200W DC-ATX and mounted the 200W AC-DC brick to the inside of the HT5. This looks like a much more elegant solution.
Posted on Reply
#3
R-T-B
eidairaman1Its a wall wart
Find me a 250W 94% efficient wallwart with common atx outputs.
Posted on Reply
#4
comtek
So minimalistic. Which one is the FET?
Posted on Reply
#5
Oasis
So cool for tiny little builds! :eek:
Posted on Reply
#6
btarunr
Editor & Senior Moderator
Added a couple of more pics, one shows the GaN FETs, and the other shows how you can combine two of these for 500 W.
Posted on Reply
#7
aQi
I like the idea for going ulta itx build with a discrete gpu. Still would like see a detailed review about how they tolerate temperatures. I guess 250w is sustainable and perhaps they peaked it out leaving no room for further watt extraction.
Posted on Reply
#8
TheLostSwede
And here I thought form factors were just that...
I mean, this is nice and all, but it's not ATX, regardless of the outputs.
Posted on Reply
#9
Valantar
aQiI like the idea for going ulta itx build with a discrete gpu. Still would like see a detailed review about how they tolerate temperatures. I guess 250w is sustainable and perhaps they peaked it out leaving no room for further watt extraction.
If HDPlex's history is anything to go by, this will be rated for 250W continuous with OCP configured to trigger not much higher than that. They'd much rather have you buy two of these than buy one, blow it up and then complain :p
TheLostSwedeAnd here I thought form factors were just that...
I mean, this is nice and all, but it's not ATX, regardless of the outputs.
You're right that it isn't ATX form factor, but it is ATX electrical standard compliant - just different meanings of the term, but the far less commonly used one is suddenly at the forefront here.



I think it's really nice to see HDPlex evolve their designs, and this frankly looks fantastic. It leaves behind their old 19V system, which was inherently inefficient due to several layers of high current voltage conversion, so this should be a significant improvement in terms of thermals. Adopting GaN is also great to see. The price is high, but that's expected for a high quality niche product, and it's competitive even with DIY 12V solutions using embedded/industrial AC-12VDC PSUs and a picoPSU, which is great. The form factor also looks great - the long, thin shape makes it easy to tuck away. I could definitely see myself adopting this for future builds, unlike previous HDPlex offerings.
Posted on Reply
#10
ZoneDymo
Iphone for scale is ok I guess... but im more in favor of the internationally recognized banana for scale
Posted on Reply
#11
TheLostSwede
ZoneDymoIphone for scale is ok I guess... but im more in favor of the internationally recognized banana for scale
Unfortunately, outside of the EU, bananas come in all kind of shapes, sizes and colours...




Posted on Reply
#12
ZetZet
TheLostSwedeUnfortunately, outside of the EU, bananas come in all kind of shapes, sizes and colours...
Well they do come in different shapes in EU too, cavendish banana is just the most common. I hope this was a joke and not some kind of "EU regulates the size of bananas" American belief.
Posted on Reply
#13
TheLostSwede
ZetZetWell they do come in different shapes in EU too, cavendish banana is just the most common. I hope this was a joke and not some kind of "EU regulates the size of bananas" American belief.
I'm not american...
But yes, it was a joke based on the belief that the EU has banana shape regulations, as it was something the Brexit campaign was spreading in the UK, among other things.
Sadly Cavendish bananas taste terrible.
Posted on Reply
#14
Tigger
I'm the only one
So i guess ATX is by the 24 pin plug, otherwise if it is smaller than a standard ATX PSU it is not ATX is it?
Posted on Reply
#16
chodaboy19
This is very useful for those extreme mITX builds I have seen around.
Is there a possibility that they can release a 375Watt in the same form factor? Then 2x would give 750Watt and could perhaps replace an SFX power supply.
Posted on Reply
#17
ZetZet
TheLostSwedeI'm not american...
But yes, it was a joke based on the belief that the EU has banana shape regulations, as it was something the Brexit campaign was spreading in the UK, among other things.
Sadly Cavendish bananas taste terrible.
EU does have banana shape regulations, like most other countries/markets. Because when stores order bananas they order them in advance from a spreadsheet, there are no pictures there, they don't go to pick them themselves, so they need to know what they're buying. When you order class 1 banana then you know for the most part what you will be receiving. www.europarl.europa.eu/unitedkingdom/en/news-and-press-releases/euromyths/bendybananas.html
Posted on Reply
#18
Valantar
chodaboy19This is very useful for those extreme mITX builds I have seen around.
Is there a possibility that they can release a 375Watt in the same form factor? Then 2x would give 750Watt and could perhaps replace an SFX power supply.
Knowing HDPlex a higher output version isn't unlikely, but it'll be larger - likely thicker, but that's ultimately up to them. It might need more area to fit more connectors to make use of the higher output power. But you can be quite sure that this is as dense in terms of power/volume as they're able to make it, and any increase in output will come with a matching increase in volume.
Posted on Reply
#19
Bobmordor
Wonder if this would fit in a inwin chopin?
Posted on Reply
#20
Valantar
BobmordorWonder if this would fit in a inwin chopin?
Most likely, yes. You'd need to roll your own backplate for the AC receptacle (and it would be a tight fit with the larger AC socket at least), but other than that it looks like it would fit.
Posted on Reply
#21
GreiverBlade
TheLostSwedeUnfortunately, outside of the EU, bananas come in all kind of shapes, sizes and colours...




well aside from being a good scale for PSU they are also a good scale for radioactivity ...

my Geiger counter is in banana values...


that aside, that's one heck of a small PSU ... about baby banana sized ....


alright enough about bananas ... they might ban an a for it ...
Posted on Reply
#22
ADB1979
GreiverBladewell aside from being a good scale for PSU they are also a good scale for radioactivity ...

my Geiger counter is in banana values...
:D :D :D
Posted on Reply
#23
aktpu
If I were to build in DB4, this would be an instant strong buy
Posted on Reply
Add your own comment
Jun 28th, 2022 22:54 EDT change timezone

New Forum Posts

Popular Reviews

Controversial News Posts