AMD drops Ryzen 9000 inter-core latency by almost 60% with AGESA 1202 update

AMD’s latest Ryzen 9000 AGESA update addresses inter-CCX latency issues and delivers a notable performance boost

Last month, we reported a major regression spotted in AMD’s dual-CCX Ryzen 9000 series processors. Specifically, this issue was a huge latency boost for inter-chip communications for AMD’s Ryzen 9000 12-core and 16-core processors. Thanks to AMD’s AGESA 1.2.0.2 update, this bug appears to have been addressed.

Users who update their motherboard’s BIOS/UEFI can benefit from reduced inter-CCX latencies from AMD’s latest processors. Inter-CCX latencies for a Ryzen 9 9950X appear to be reduced from around 180ns to around 75ns. That’s a 60% reduction in latency. This allows cores to communicate faster and spend less time waiting for data to move from core to core.

Early users of this new BIOS update have already reported performance increases. This new update should have a significant impact on latency-sensitive workloads like gaming. However, all workloads that utilise high core counts should benefit from this latency reduction.

(Ryzen 9000 inter-CCX latencies reduced from around 180ms to around 75ms – via Overclock.net)

This development will force reviewers to re-test AMD’s Ryzen 9000 series CPUs before future CPU launches. With Intel’s Arrow Lake CPUs being due to launch next month, AMD retesting will need to be completed quickly to ensure a fair comparison.

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