The Ryzen 5 7600X has 6 cores and 12 threads. (Source: Notebookcheck)
The Ryzen 5 7600X has 6 cores and 12 threads. (Source: Notebookcheck)

Some versions of the AMD Ryzen 5 7600X have been plagued with the low performance following the recent AGESA 1.0.0.4 firmware update. Reports claim that the latest AGESA firmware has disabled Core0 on Ryzen 5 7600X processors which carry two CCDs significantly reducing the performance of the chip.

The newest AGESA ComboAM5PI 1.0.0.4 firmware from AMD is allegedly causing performance troubles for some Ryzen 5 7600X processors. The report comes to us courtesy of chi11eddog who suggests that the firmware is disabling Core0 on dual-CCD versions of the Ryzen 5 7600X causing boot failure. Fortunately, the issue only plagues chips with AGESA 1.0.0.4.

For the uninitiated, the AMD Generic Encapsulated Software Architecture (AGESA) initializes memory, processor cores, chipset, etc, and is a part of the Basic Input-Output System (BIOS).

While technically the Ryzen 5 7600X processor doesn’t need multiple CCDs, Ryzen 5 7600X processors can have dual CCDs, as AMD bins down silicon that doesn’t meet performance/quality requirements for high-end Ryzen chips to lower-end Ryzen 5 and Ryzen 7 CPUs. This is done to extract as many useable processors from a single wafer as possible.

While we don’t have any official explanation as to why some dual-CCD Ryzen 5 7600X parts are affected Tom’s Hardware postulates that the AGESA 1.0.0.4 firmware might be having trouble distinguishing single-CCD Ryzen 5 7600X CPUs from the dual-CCD ones causing it to disable Core0. At the time of writing, MSI and ASRock have pulled down the firmware from their website for their X670 and B650 boards. Gigabyte hasn’t yet followed suit.

If you have, unfortunately, installed the firmware, update the BIOS of your motherboard to a newer version if it is available. Otherwise, you can also try downgrading the BIOS to an earlier version.

Buy the AMD Ryzen 5 7600X on Amazon

MSI & ASRock removed X670/B650 AGESA 1.0.0.4 (SMU 84.79.204) BIOS from the websites.
It’s rumored some 7600X are downcore from 2-CCD SKU with Core0 disabled, with which 1.0.0.4 can’t boot. AGESA 1003 is fine.
New SMU 84.79.210 will fix. 1.0.0.4 BIOS still on Gigabyte website. pic.twitter.com/N8wnryyXgg

— chi11eddog (@g01d3nm4ng0) January 7, 2023

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