AMD and Intel invest in Salience Labs' $125m round for optical data-centre switches

City AM reported that pressure on electricity supply has made energy-saving technology increasingly attractive to investors and the world's largest chipmakers ^[17]. Neither AMD nor Intel is quoted giving a reason for investing. The only investor comment comes from Callum Stewart, a principal at Bullhound Capital, who said the startup had "developed technology capable of meeting both the immediate and longer-term needs of data centre operators" ^[8].

Conventional networking equipment relies heavily on electrical signals, while Salience's optical circuit switching keeps data travelling as light ^[15]. City AM described the effect as potentially reducing power consumption and delays ^[15], and said the approach could let data centres devote more of their limited electricity to running AI models ^[16]. The report does not include a measured saving, the share of a data centre's load that goes to networking, the size of either chipmaker's stake or any supply agreement. Neither investor has said so, but we think the incentive for an accelerator supplier is plain: if power is the cap, each watt freed from moving data is a watt available for compute.

Salience's chief executive is more careful about timing. Vaysh Kewada said "OCS will play a critical role in AI datacenter networking" ^[5]. He then attached a condition: "As customers roll out optical links in their datacenters, high-performance optical switches are needed to deliver the token economics that workloads demand" ^[6]. Demand for the switch follows the rollout of optical links, and Kewada said the investment would accelerate the company's move towards high-volume production ^[7].

The grid numbers sit one step away from the product. Figures cited in a recent Ofgem consultation put the UK connection queue at 125 gigawatts in June 2025, up from 41 gigawatts in November 2024 ^[9]. That is 84 gigawatts added ^[13] in seven months ^[14]. Ofgem has proposed tougher requirements for data centre developers, including substantial upfront financial commitments, to stop speculative projects blocking access ^[10]. Some developers are considering building their own generation to avoid connection delays ^[11]. The queue counts requests to connect, and an optical switch lowers load inside a building, so the switch would only shorten the queue if a developer asked for less power because of it.

A venture stake is not a purchase order. Still, two chipmaker investors in one round is evidence of interest from suppliers of compute. British chip infrastructure is drawing large rounds more broadly: Fractile, another Oxford-founded startup, secured $220m earlier this year, including from Peter Thiel's Founders Fund, for technology designed to make AI computing faster and cheaper ^[12].

For an operator sizing a power request this quarter, the practical reading is cautious. If Ofgem adopts upfront commitments, an oversized request costs money from the start ^[10].