https://ark.intel.com/content/www/us/en/ark/products/130409/intel-core-i78809g-processor-with-radeon-rx-vega-m-gh-graphics-8m-cache-up-to-4-20-ghz.html https://

https://ark.intel.com/content/www/us/en/ark/products/130409/intel-core-i78809g-processor-with-radeon-rx-vega-m-gh-graphics-8m-cache-up-to-4-20-ghz.html https://ark.intel.com/content/www/us/en/ark/products/130409/... Intel has already shipped a MCM with an Intel CPU and a AMD GPU, back in 2018. That probably just used PCIe, since cache coherence wasn't needed.