Whereas desktop PC energy provides obtain the majority of fanatics’ consideration for good causes – not the least of which being the huge choice of choices that comes from being a standardized half – energy provides as an entire aren’t only a concern for giant PCs. With the vast majority of PC gross sales having flipped to pocket book gross sales some years in the past, pocket book energy provides already lead the market in quantity. And whereas most laptops don’t want the form of massively powered PSUs that dominate the desktop area, even that’s slowly altering as desktop replacement-class laptops more and more develop in efficiency and energy consumption.

Maybe the poster-child for the high-performance, high-powered laptop computer is Eurocom, who has a protracted historical past of creating heavy-duty DTR laptops which can be all however moveable desktop methods. Following current developments in GPU energy consumption and in GPU reputation for each gaming and AI workloads, the corporate has been promoting a variety of “cell supercomputers”, that are virtually massive, tailored laptops that rival even the very best of desktop computer systems – and have the facility necessities to match.

In an effort to energy their very own high-end laptops, Eurocom has developed a fairly uncommon 780W AC adapter for high-performance laptops. Meant to energy probably the most highly effective of highly effective laptops, their newest energy adapter can provide over three-quarters of a kilowatt of DC energy; a desktop-like wattage for a desktop-like system. It’s a laptop computer energy adapter that’s distinctive in its scale, and with some room to scale up even additional.

Eurocom 780W AC Adapter

Energy specs
DIMENSIONS 325 x 110 x 40mm, 1.38kg
AC INPUT 90 – 264 VAC, 50 – 60 Hz
MSRP PSU: $299, Cable: $129+

Eurocom has provided this adapter for just a few years now. But it surely’s taken on a brand new life as extra laptops have been launched that use such a big adapter (or two smaller 300W-ish energy adapters). And, critically, Eurocom has made additional DC cable/connector sets for other manufactuers’ laptops, considerably rising the variety of methods it’s appropriate with. Presently, Eurocom gives DC cables for the next laptops:

  • Alienware M17x M18x; 1x DC Cable ; w/ barrel AW connector; 193cm/6.4ft 
  • Alienware AREA 51m; 1x DC Cable + Splitter Field w/ 2x barrel AW connectors; 152cm/5ft 
  • ASUS ROG G18 Strix; GX501V; GM501; GM501GM; GX531GM; 1x DC Cable; w/ barrel ROG connector 
  • ASUS G703GX, GZ700GX; 1x DC Cable w/ 2x ROG barrel connectors; 152cm/5ft 
  • CLEVO, OriginPC, Sager, XMG, EUROCOM laptops; 1x DC Cable; w/ 4-pin spherical connector; 182cm / 6ft 
  • CLEVO X370SNx; 1x DC Cable; w/ sq. connector; 120cm / 3.8ft 
  • CLEVO X170SM/X170KM; 1x DC Cable; w/ twin sq. connectors; 152cm / 5ft 
  • Dell Precision 7720/7710; 1x DC Cable; w/ barrel Dell connector; 120cm / 3.8ft 
  • MSI GE76, GT76, GT77, GE78HX Raider, Titan 18HX 1x DC Cable; w/ single sq. connector; 120cm / 3.8ft 
  • MSI laptops & MSI Trident AS Gaming Desktops; 1x DC Cable; w/ 4-pin spherical connector; 182cm / 6ft 

The Eurocom 780W AC Adapter

Externally, the Eurocom 780W AC adapter seems to be like a hybrid between a PC PSU and a laptop computer adapter. It’s formed like an outsized laptop computer AC adapter however has a metallic physique and cooling vents/followers. Eurocom advertises that it weighs “only one.34kg”, which is the load of a complete 14-inch laptop computer by comparability, however is comparatively light-weight for a PSU with that form of energy output. The corporate emblem is debossed throughout the highest aspect of the adapter, with 4 spherical anti-slip pads discovered at its backside. Care must be taken whereas transferring it round as a result of the metallic edges and weight can spell bother for wood surfaces.

Eurocom put in a small data show on the AC adapter, which exhibits the present, voltage, and energy output, in addition to the temperature of the adapter. It isn’t completely correct – we will see it was studying a 12W load with out a DC cable hooked up to the adapter – but it surely works as a fundamental reference. Subsequent to it, there’s a heavy-duty metallic connector for the DC cable. On the opposite aspect we will discover a typical three-prong C14 AC cable receptacle, in addition to an on/off change, which isn’t one thing generally discovered on laptop computer AC adapters.


Opening up the chassis, we will see that the Eurocom 780W AC adapter just isn’t in contrast to frequent PC PSUs – simply much less advanced as a result of must solely generate a single 20V rail. The fundamental format is similar, with an AC filter on the enter consisting of 4 Y capacitors, two X capacitors, and two substantial filtering inductors, that results in a rectifying bridge. The GBJ1508 bridge is made by HY Digital Cayman Ltd, a Taiwanese firm we’re encountering for the primary time.


Then we have now an APFC circuitry with an enormous Aishi 450V/560μF capacitor and a big filtering coil being its passive elements, with a Toshiba K31N60W regulator on the identical heatsink as the 2 MOSFETs that type a typical half-bridge configuration. Following that we have now a small transformer and two Infineon 045N10N MOSFETs to generate the 20V energy output. Cooling is offered by two Protechnic Electrical MGT3812XB-W20 38 mm followers, that are small however prime quality merchandise with a double-ball bearing engine.

Take a look at Outcomes (~25°C Ambient)

For the testing of PSUs, we’re utilizing excessive precision digital masses with a most energy draw of 2700 Watts, a Rigol DS5042M 40 MHz oscilloscope, an Extech 380803 energy analyzer, two excessive precision UNI-T UT-325 digital thermometers, an Extech HD600 SPL meter, and numerous different bits and elements. 

The common effectivity of the Eurocom 780W AC adapter may be very excessive, at 91.6% when the PSU is powered from an 230V AC supply and drops right down to 90.9% when powered from an 115V AC supply. There is no such thing as a 80Plus or related effectivity certification masking this PSU, however there’s laws such because the Ecodesign 2019/1782 directive, and, regardless that the producer doesn’t absolutely publish its efficiency specs because the directive requires, the Eurocom 780W adapter appears to simply meet them. We should point out that this sort of PSU has a bonus over traditional PC PSUs as a result of it solely generates a single voltage line, and conversion losses are decrease, so it shouldn’t be instantly in comparison with any multi-voltage output PSU.

The 2 small followers of the Eurocom 780W AC adapter appear hardwired to the facility output of the unit, largely ignoring the temperature of the adapter and adjusting their pace solely in accordance with the load. As much as 40% load, which ought to cowl the facility wants of most gaming laptops anyway, the adapter is virtually completely silent. The pace of the fan progressively will increase when the load is bigger than 330 Watts, reaching terrifying noise figures at most load. Given the character of the adapter, it’s extremely unlikely that it’ll function at such excessive a load for extended intervals of time, as even the laptops that require 2×330 Watt adapters won’t constantly maintain such a excessive load.

Energy Provide High quality 

{The electrical} efficiency of the Eurocom 780W AC adapter is surprisingly good in comparison with its datasheet specs. Eurocom claims a most voltage ripple of 200 mV however we recorded a most of 116 mV, which is alright for a 20 V rail and higher than we anticipated as a result of mediocre secondary aspect filtering. Voltage regulation is superb, at simply 1.2% throughout the nominal load vary.

Essential Output
Load (Watts) 158.03 394.68 586.46 780.78
Load (P.c) 20% Load 50% Load 75% Load 100% Load
  Amperes Volts Amperes Volts Amperes Volts Amperes Volts
20 V 7.8 20.26 19.5 20.24 29.25 20.05 39 20.02


Line Regulation

(20% to 100% load)
Voltage Ripple (mV)
20% Load 50% Load 75% Load 100% Load
20V 1.2% 44 66 82 116

Throughout our routine analysis, we study the elemental safety options of all energy provide models we evaluation, together with Over Present Safety (OCP), Over Voltage Safety (OVP), Over Energy Safety (OPP), and Quick Circuit Safety (SCP). The Eurocom 780W AC adapter behaves fairly oddly right here, because it has a rated output of 39 A and a most output of 45 A for 25 ms. Nonetheless, we have been in a position to attract 50 A from the unit, which is sort of 1000 Watts, for a number of minutes with out triggering the OCP/OPP safety. The PSU didn’t present any severe indicators of stress or overheating over that point, nor poor electrical efficiency. The OPP safety triggers instantly as soon as the load is bigger than 50.3 A – and likewise instantly resets and restarts the PSU when the load drops beneath 50.2A. It will appear that this platform was initially designed to be considerably extra highly effective and the OEM “forgot” to regulate the OCP/OPP set off factors.


The Eurocom 780W AC adapter melds uncooked energy with innovation, presenting a bit that is as formidable as it’s intriguing. With its substantial weight and metallic edges, it calls for respect and warning, particularly on delicate surfaces. Nonetheless, its weight is justified by the spectacular energy output it delivers, making it a powerhouse that considerably overshadows its cumbersome, heavy-set design. The inclusion of a show for monitoring efficiency is a brilliant contact, although its accuracy leaves room for enchancment.

On the within, Eurocom does not skimp on high quality. The adapter’s internals are a testomony to cautious choice and engineering, carefully mirroring the complexity and effectivity of high-end PC PSUs. Its cooling system, although compact, features effectively and offers good efficiency with out compromising on noise ranges — at the very least beneath most masses. That mentioned, the adapter’s noise profile at most load won’t be everybody’s cup of tea, hinting at a steadiness but to be perfected between energy and tranquility.

Total, Eurocom’s 780W AC adapter boasts commendable effectivity and electrical efficiency. However as a premium-priced product – a whole unit and cable will set you again at the very least $429 – it may gain advantage from a contact extra finesse, notably when it comes to consumer security and operational noise at excessive masses. In any other case, I am personally a bit stunned that Eurocom is not providing a open-ended cable for DIY fanatics, which may broaden its attraction and utility. Such an addition wouldn’t solely cater to a wider viewers but in addition underscore Eurocom’s dedication to versatility and innovation.

In sum, whereas the adapter stands out for its energy and efficiency, there’s additionally a transparent avenue for Eurocom to reinforce its attraction by way of minor, but impactful, enhancements.

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