2025 Computex Review – An Introduction to 800V HVDC Power Rack

The 2025 Taiwan International Computer Exhibition (Computex) was held as scheduled at the end of May. In the previous article (NVIDIA (NVDA US) 2025 GTC Review – Is Amphenol (APH US) Dead Beyond NVL72?), I provided a review of NVIDIA's 2025 GTC Conference. Today, I will write another review on the 2025 Computex at the request of readers, focusing on the biggest highlight of the exhibition: the 800V high-voltage direct current (HVDC) power rack for AI data centers.

First of all, we need to understand that there are two different reference designs for the 800V HVDC power rack: one is NVIDIA’s own reference design, and the other is the OCP (Open Compute Project) reference design led by CSP customers. These two designs are still not finalized yet, but we can get a glimpse of their structure from the designs released by several power rack makers.

On NVIDIA’s side, Megmeet has unveiled its 800V HVDC power rack design for NVIDIA at the 2025 GTC Conference (see image below):

The Megmeet’s power rack is designed for 570kW power with single-side 800V DC output. A distinctive feature of this cabinet is that it can be either placed on the data center floor or mounted on the wall, thereby saving space in the data center. As shown in the image above, the top part of the cabinet (in black frame) is the PDU (Power Distribution Unit), the bottom left part (in red frame) is the PSU (Power Supply Unit), and the bottom right part (in green frame) is the CBU (Capacitor Blocking Unit).

Among these, the PSU section is configured with 19 PSU modules, each with 800V and 30kW (thus the total power is 19 x 30 kW = 570kW), the ASP of each PSU module is about $10,000. Interestingly, Megmeet adapted its original 800V electric vehicle charging module into a PSU module for data center application. One PSU module contains 6 gallium nitride PFCs (Power Factor Correction) and 8 silicon carbide MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). The main supplier for the gallium nitride PFCs is Navitas, with a unit price of about $3 each; the main suppliers for the silicon carbide MOSFETs are Infineon and ST Microelectronics, with a unit price of about $5 each. The CBU section is also configured with 19 capacitor modules, containing a total of 500~600 EDLCs (Electric Double Layer Capacitors), which is mainly supplied by Nantong Jianghai, with a unit price of about $5 each.

In the following paragraphs, I will introduce to you the OCP version of the 800V HVDC power rack design (using Delta Electronics as an example), along with the content value of each main component.