Author: Ni Jiasheng
AMD responded quickly to the problem that Zen 2 processors could not achieve nominal acceleration frequencies. In the early morning of this morning, when US time was September 10, a new BIOS microcode update was given on time, with version AGESA ComboAM4 126.96.36.199ABBA. Earlier, BIOS, which uses new microcodes, had leaked ahead of time in some domestic forums.
Last week, a YouTubeer with an ID of De8auer pointed out in his video that many Zen 2 processors did not reach the maximum single-core acceleration frequency officially given. Of the 2700 reports he collected, only 5.6% of Ryzen 9,3900X users reported that their processors could reach or exceed the nominal 4.6 GHz. AMD officials were quick to acknowledge that the problem did exist and said they were already working on fixing it and that new microcodes would be released on September 10.
On the evening of September 9, the new BIOS of the MSI X570 series motherboard was already in place.Chiphell ForumIt was leaked (the download link has been removed from), Tom's Hardware and the leaked new BIOS has been carried out in a timely mannetestIn the test, Ryzen 7 3700X can reach the nominal 4.4 GHz correctly, but when using the old 188.8.131.52 AB microcode, their 3700X can only reach 4.375 GHz.
The performance of Ryzen 9 3900X under the new BIOS support is quite different from the original. The maximum acceleration frequency even exceeds the nominal 4.6 GHz, reaching 4.625 GHz, while the original can only reach 4.575 GHz. But in POV-Ray and inebench tests, its maximum acceleration frequency dropped to 4.25 GHz.
Generally speaking, Tom's Hardware believes that the new microcode does improve the performance of Zen 2 processor, which significantly changes the thermal threshold of the processor.
Later, AMD officially released new microcode updates:
Hello, everyone! We are pleased to see your support and the strong momentum of AMD's third-generation Revlon processors on the market. We will continue to follow your feedback. Today, we have updated the processor acceleration behavior, desktop standby behavior and monitoring SDK that we are concerned about. The first two changes will come in AGESA 1003ABBA, and we plan to release SDK on development.amd.com on September 30.
It is expected that the official BIOS updates of motherboarders will come in the near future.