AMD AGESA 1.2.0.2 BIOS Improves Inter-Core Latency For Zen 5 “Ryzen 9000” CPUs, 58% Reduction & Major Performance Uplifts

AMD has seemingly addressed the inter-core latency issues for its Zen 5 "Ryzen 9000" CPUs, with core-to-core Latencies seeing big drops & also leading to extra performance.

AMD Quickly Addresses Ryzen 9000 "Zen 5" Inter-Core Latency Issues With AGESA 1.2.0.2 BIOS Firmware, Massive Improvements

A few weeks ago, it was reported that AMD was working on a patch to improve the inter-core or core-to-core Latencies for its newly launched Ryzen 9000 "Zen 5" CPUs since various tech outlets discovered that the Latencies weren't optimal with up to 180-200ns Latencies when two cores from different CCDs communicated with one another. This led to sub-optimal performance & far worse results than what were seen on the Ryzen 7000 "Zen 4" CPUs.

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It looks like AMD has patched this intercommunication between the cores and CCDs in its latest AGESA 1.2.0.2 BIOS update. ASUS announced the first roll of this particular BIOS & currently rolls out across a range of X670E, B650E, and B650 motherboards. This means that PC users who are running any of the updated motherboards with the Ryzen 9000 chips can leverage the new BIOS and see noticeable gains.

Anandtech Forum member, Det0x, managed to update his ASUS ROG Crosshair X670E Gene motherboard with the latest BIOS and posted results comparing the previous BIOS to the latest one using the CapFrameX core-to-core latency tool. The results are quite impressive. With the older BIOS, the user saw an average latency of 180ns between the CCDs and around 18-20ns when the cores communicated on the same CCD.

With the new BIOS, the average latency drops down by 58% to 75ns when communicating across CCDs and the inter-CCD latency remains the same at 18-20ns.

AMD Ryzen 9 9950X With AGESA 1.2.0.1A BIOS:

AMD Ryzen 9 9950X With AGESA 1.2.0.2 BIOS:

Now Inter-core Latencies shouldn't impact overall