The AMD EPYC 8635P "Sorano" carries 84 Zen 5 cores in a single-socket configuration, paired with 6 x 64GB DDR5 and a Kioxia KCD8XPUG1T92 PCIe Gen5 NVMe drive. The test ran more than 100 server benchmarks under Ubuntu 26.04 LTS, comparing Linux 6.18.52 against Linux 7.3 Git as of 17 September. The kernel builds came from the Ubuntu Mainline Kernel PPA.

The 8 percent geo mean is a software-side number, and it does not tell the buyer which of the 100-plus benchmarks moved or whether the gain concentrates in I/O, context switching, or compute. The document measures one kernel revision against another on one socket, and it does not prove the delta survives the stable release or holds on a second socket. The constraint is the kernel, not the silicon; the fab did not change a transistor, and the buyer gets the gain by updating the OS without knowing whether power draw shifted alongside throughput.

The stable Linux 7.3 release lands in the second half of October, and the final LTS designation for 2026 is not yet declared. Power consumption under the 7.3 kernel was not reported as a standalone figure. The per-benchmark breakdown across storage, networking, HPC, video encoding, database, and AI workloads remains in the linked pages but is not stated in the introduction.

The 8 percent geo mean is a kernel-side gain, not a silicon-side gain, and the document does not prove it holds beyond a single socket or a single kernel revision. The buyer updates the OS to capture the delta, but the fab changed nothing, and power draw under the new kernel was not reported.

Power consumption under Linux 7.3 and the per-benchmark breakdown across the 100-plus test suite were not stated in the introduction.

An 8 percent geo mean across 100-plus benchmarks on one socket is a software delta. It does not isolate which subsystems drove the gain, does not confirm stability across the stable release, and does not report power consumption. The constraint is the kernel version, not the die.