NVIDIA Takes #1 Market Share in Data Center Ethernet Switches for the First Time
N.R. Finch
IDC data shows Nvidia seized 21.5% of global data-center Ethernet switch revenue in Q1 2026, topping the market for the first time — a sign its competitive reach now extends well beyond GPU chips into the full AI data-center infrastructure stack.
How did Nvidia become the top Ethernet-switch seller?
In Q1 2026, Nvidia's data-center Ethernet switch revenue hit $2.1 billion, up 192.7% year-on-year.
This means → in under two years, Nvidia went from a newcomer in networking gear to the revenue leader, overtaking Cisco, Arista, Huawei, and HPE.
CFO Colette Kress disclosed on the May earnings call that the data-center networking business reached $15 billion in full-year revenue, nearly doubling year-on-year.
Why are GPU buyers also buying Nvidia's switches?
Nvidia's Spectrum-X Ethernet platform — a high-speed networking stack designed specifically for AI clusters — is now larger than all Ethernet peers combined.
In plain terms = when a customer picks Nvidia GPUs for an AI data center, it gravitates toward Nvidia networking too — like buying a phone and earbuds from the same brand because they pair more smoothly. Switching vendors adds friction.
This reflects a deepening "ecosystem lock-in": the performance edge from co-designed GPU-plus-network makes it harder for customers to unbundle.
Was this card actually played five years ago?
In 2020, Nvidia acquired Mellanox Technologies — an Ethernet and InfiniBand interconnect specialist — for roughly $7 billion. The market largely viewed it as a routine product-line fill.
This means → the real inflection came when large-model training scaled from hundreds of GPUs to tens of thousands. Data exchange between GPUs became the new bottleneck, and Mellanox's technology finally showed its strategic value.
In plain terms = a $7 billion "accessories company" bought five years ago has become the lever prying open a $21-billion switch market.
What does the high-speed switch market look like?
IDC data shows 800G switches accounted for 35.8% of data-center market revenue in Q1 2026; 200G and 400G switches together made up 34.1%.
This means → AI data-center buildouts are pushing the entire networking-equipment market toward higher speeds, with 800G already the single largest revenue segment.
Whether Nvidia can hold the top spot as Cisco, Arista, and other incumbents counter-attack is the key question for coming quarters.
Content is for reference only, not financial advice.