Asus Unveils Tiny 1200 Watt Power Supply with 16-pin PCIe 5.0 Power Connector

(Image credit: Asus)

Asus has introduced the industry's first SFX-L 1,200W power supply unit and it comes equipped with a 16-pin auxiliary PCIe 5.0 power connector. The PSU is designed for ultra-high-performance compact systems that use high-end power-hungry CPUs and graphics cards. 

The Asus ROG Loki family of ATX-compliant modular PSUs is set to be available in 1200W, 1000W, 850W, and 750W versions, all of which come equipped with a 16-pin PCIe Gen5 auxiliary power connector that can deliver up to 600W of power to high-end graphics or other kinds of accelerators. Traditionally for high-end PSUs, the ROG Loki lineup uses low-ESR Japanese capacitors and supports 'a slew of protection mechanisms.' 

Cooling is one of the primary challenges associated with designing such a powerful PSU, so Asus had to use truly high-quality components and cool them efficiently. Still, it remains to be seen how loud the PWM-controlled fan is under high loads. 

As for efficiency, the highest-end 1200W ROG Loki power supply carries the 80 Plus Titanium badge (which means that it is at least 90% – 94% efficient under a 20%, 50%, and 100% load for 110V and 94% - 96% efficient under a 20%, 50% and 100% load for 230V). By contrast, the remaining PSUs carry the 80 Plus Platinum badge (which means they are at least 89% - 94% efficient, depending on input voltage). 

Asus plans to start selling its ROG Loki SFX-L PSUs this year, but it hasn't disclosed when it will arrive or what the recommended prices will be. All power supplies will be covered with a 10-year warranty, whereas the RGB LED will be backed by a three-year warranty.  

Although hardware developers pay close attention to the energy efficiency of their products these days, high-end parts are slowly gaining power consumption since there is cut-throat competition in the high-performance PC market. To that end, even compact gaming PCs are slowly gaining power consumption. To power such systems, all new 1,000W+ SFX/SFX-L PSUs are needed even for compact systems. It looks like Asus is the first to offer one.  

One thing to note about SFX-L PSUs is that they are 3 cm deeper than SFX power supplies, so they do not fit into typical Mini-ITX cases that follow the form factor guidelines completely. Meanwhile, they will fit perfectly into gaming Mini-ITX chassis that has plenty of space inside.  

Anton Shilov
Freelance News Writer

Anton Shilov is a Freelance News Writer at Tom’s Hardware US. Over the past couple of decades, he has covered everything from CPUs and GPUs to supercomputers and from modern process technologies and latest fab tools to high-tech industry trends.