When it comes to running open-source Coreboot on retail motherboards it's sadly mostly a matter of generations-old platforms like various AMD Opteron server motherboards, old ThinkPads, many generation old motherboards for out-of-date Intel CPUs, and other dated hardware. To much excitement, 3mdeb has been porting Coreboot and the Dasharo open-source firmware to the MSI PRO Z690-A motherboards... Yes, finally Coreboot on a retail and broadly available motherboard that's latest-generation!..
Last month with the AMD EPYC 7773X Linux benchmarks and Milan-X in the Azure cloud I showed the impressive capabilities of AMD's new Milan-X processors with 768MB of L3 cache per socket (1.5GB cache per 2P server!) for a range of workloads. All of that initial benchmarking as usual was done using the default GCC system compiler across all tested AMD/Intel processors. Of course, there also exists AMD's Optimizing C/C++ Compiler (AOCC) as a downstream of LLVM/Clang with various Zen optimization patches applied. Curious about the AOCC impact for Milan-X, here are some benchmarks looking at the EPYC 7773X 2P performance across AOCC, GCC, and LLVM Clang.