AMD BIOS Update Significantly Reduces Ryzen 9000 Cross-CCD Latency

A new AGESA microcode update cuts latency by over 50%, addressing performance issues in AMD's dual-CCD Ryzen 9000 CPUs.

The AGESA 1.2.0.2 microcode update reduces cross-CCD latency on Ryzen 9 9900X and 9950X from 180 ns to 75 ns.
The update brings latency levels in line with the previous generation Ryzen 7000 series, improving performance in multi-threaded applications.
User reports and benchmark tests show gains of 400-600 points in synthetic benchmarks like Cinebench R23 following the update.
The update is currently available in beta for Asus motherboards, with other manufacturers expected to roll out their versions soon.
The latency issue was caused by new tuning parameters in Zen 5 that did not account for synthetic benchmarks, which AMD has now reversed.