What proportion of precious metals are actually used inside NVIDIA server racks, and which metals are used the most?

Silver sintering technology is indeed used in high-end power devices and some advanced packaging: it is used for die attach, replacing traditional soldering, providing better heat dissipation and reliability. Mainly applied in SiC/GaN power modules, electric vehicle inverters, high-temperature electronics, etc.
However, in NVIDIA's AI GPUs (such as H100, Blackwell GB200 series):

The amount of silver used is very minimal, mainly in silver sintering paste, for internal chip or module bonding layers.
Typical usage: the silver sintering layer for a single high-power chip is only a few milligrams to grams (industry data: power module die attach commonly uses 0.1- several grams of silver paste, containing 80-90% silver).
Even in the most advanced Blackwell GPU (dual-die design), the silver used per module would not exceed 10-20 grams (conservative estimate), far less than "200-500 grams."
A standard AI rack (such as NVIDIA GB200 NVL72 with 72 GPUs) might contain a total silver usage of a few hundred grams to 1-2 kilograms (mainly from sintering layers + small amounts of conductive connections), definitely not reaching 10+ kilograms.
Source verification: there are no reliable industry reports, official NVIDIA data, or supply chain analyses supporting such high usage. Instead, AI servers emphasize copper (a single GB200 NVL72 rack uses over 3 km of copper cables, thousands of cables, totaling tons of copper) and small amounts of gold/silver plating.
In NVIDIA AI GPU/server racks, what is the most used metal? How much is used?
The most used metal: Copper, without question.
Reason: Copper is the core material for power transmission, signal interconnection, and heat dissipation. AI servers have high power consumption (over 120kW per rack), requiring大量 copper cables, busbars, PCB traces, power lines.
Approximate usage:
A high-end AI rack (like GB200 NVL72): internal NVLink copper cables total over 3.2 km (more than 5000 cables), plus power/heat dissipation copper components, with total copper weight possibly hundreds of kilograms to tons (including busbars over 200kg).
Entire data centers: AI facilities use several times more copper than traditional data centers (thousands of tons of copper per MW of power).
Copper is the backbone of AI infrastructure; the surge in demand is another major driver beyond precious metals and new energy price increases.
Other main metals:
Aluminum: used in rack frames, heatsinks, less than copper (tens to hundreds of kilograms per rack).
Silver: trace amounts, mainly in sintering die attach, conductive paste, some connectors. Total usage is very small (< a few kilograms per rack), but industrial demand growth pushes silver prices higher.
Gold: even less, used for plating/bonding wires (grams level).
Rare earths, etc.: used in magnets/cooling, but not primary.
In summary, the AI boom has indeed driven demand for precious metals (silver for advanced packaging, gold for connections), but the silver used in NVIDIA racks is far from exaggerated. The real "metal-consuming giant" is copper — which is also why copper prices have performed strongly this year.