Dual-CCD Ryzen 5 7600X performance reportedly suffers a potential hit after the newest AGESA firmware update
The newest AGESA ComboAM5PI 188.8.131.52 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 184.108.40.206.
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 220.127.116.11 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.
MSI & ASRock removed X670/B650 AGESA 18.104.22.168 (SMU 84.79.204) BIOS from the websites.— chi11eddog (@g01d3nm4ng0) January 7, 2023
It's rumored some 7600X are downcore from 2-CCD SKU with Core0 disabled, with which 22.214.171.124 can't boot. AGESA 1003 is fine.
New SMU 84.79.210 will fix. 126.96.36.199 BIOS still on Gigabyte website. pic.twitter.com/N8wnryyXgg