The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Happened as dated, per macrumors.com: "…nes that use the new technology will be released in the first quarter of 2018. Get weekly top MacRum…"
Wikipedia's Kaby Lake article lists the 8th-generation Kaby Lake G processors (release Q1 2018; i7-8809G 4 cores/8 threads, 3.1/4.2 GHz, 8 MB L3, 100 W with Radeon RX Vega M GH) and the Vega M GH/GL GPU specs with 4 GB HBM2 at 204.8/179.2 GB/s, linked via EMIB.
LaptopMag covers a related but distinct product, the HP Spectre x360, confirming "the newly announced Intel Kaby Lake-G chip with built-in Radeon RX Vega M graphics" would ship around 18 March 2018 - tangential corroboration of the Intel-AMD[4] chip's Q1 2018 arrival rather than the pin's own November 2017 announcement.
AMD's own investor-relations release, dated 6 November 2017, confirms the semi-custom GPU partnership itself, describing "an Intel Core processor, semi-custom Radeon graphics chip, and second generation High Bandwidth Memory (HBM2) into a single package," the original announcement the pin's stored Q1 2018 date follows.
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