On July 21, AMD will host the Advancing AI event in San Francisco from July 22 to 23, where it is expected to disclose more details about the MI500 series GPUs and the scale-up CPO roadmap. In response to community questions, Serenity pointed out that if AMD clearly commits to adopting the CPO solution and discloses the optical engine supplier at the event, it would be a positive for the entire CPO theme — meaning that NVIDIA would no longer be the only company driving the optical interconnect transition. Currently, Jefferies analyst Blayne Curtis expects AMD to cooperate with Astera Labs on UAL and with Broadcom on ESUN, but the key point is whether AMD will formally shift to a CPO-based scale-up solution and who will supply the optical engine. Serenity believes that a clearer supply chain reading can only be obtained after the event on Wednesday or Thursday, and it is too early to draw conclusions. For Sivers, the supply chain connection can currently only be inferred through indirect pathways: first, GlobalFoundries is reportedly involved in AMD's MI500 CPO work and Sivers is its reference laser supplier; second, AMD has previously invested in Ayar Labs. If AMD discloses the use of Ayar Labs or GlobalFoundries' SCALE as the MI500 CPO optical engine solution at the event, it would be a major positive for Sivers — as an upstream laser and reference laser supplier, Sivers occupies a core position in both pathways. The MI500 is expected to shift to a native UAL scale-up architecture, supporting 256 GPUs per rack and interconnected via optical links. Sivers has been continuously positioning itself across multiple technology paths this year, including CPO, pluggable optical modules, and silicon photonics. If the AMD event confirms its indirect entry into the supply chain, it will further validate its full-scenario layout strategy in the field of optical interconnects.