AMD Software 26.11.1 fixes excessive SSD writes
The WHQL Optional driver stops the External Events Client Module from writing up to about 1.8GB per hour to the system drive.
AMD released AMD Software 26.11.1, a WHQL-certified Optional driver update, on November 13, 2026, according to 4gamer.net. The release addresses a bug that caused continuous excessive writes to storage.
The culprit was the AMD External Events Client Module (atieclxx.exe), which wrote roughly 0.3-0.5MB per second to storage. At that rate the writes could reach up to about 1.8GB per hour, a load that could shorten SSD endurance, measured as TBW.
The update fixes the excessive writes to the system drive when the system is idle on Radeon RX 7000 series and later GPUs, and also addresses excessive writes that occurred while moving or resizing application windows.
The driver covers Radeon RX 9000 series and AI PRO R9000, RX 7000, RX 6000 and RX 5000 series, the RX 7000M/7000S, RX 6000M and RX 5000M mobile parts, plus Ryzen AI 400/300, Ryzen 9000/8000/7000/6000 series APUs and Ryzen Mobile Processors with Radeon Graphics (RDNA and later).
Known issues
AMD lists intermittent crashes or driver timeouts in Assassin's Creed Black Flag Resynced on RX 7000 series, and in Cyberpunk 2077 on some RX 9000 series GPUs with FSR Upscaling, Radeon Anti-Lag and in-game frame generation enabled. Users hit by War Thunder driver timeouts on RX 5000 series are advised to roll back to AMD Software 26.9.1.
The excessive-write bug was reported to have existed at least since AMD Software 26.10.1; the previous version compared against is AMD Software 26.10.2.
Quick answers
What does AMD Software 26.11.1 fix?
It fixes continuous excessive writes to storage by the AMD External Events Client Module (atieclxx.exe), including when the system is idle on Radeon RX 7000 series and later GPUs and when moving or resizing application windows.
Which GPUs does AMD Software 26.11.1 support?
Radeon RX 9000, AI PRO R9000, RX 7000, RX 6000 and RX 5000 series, RX 7000M/7000S, RX 6000M and RX 5000M, along with Ryzen AI 400/300, Ryzen 9000/8000/7000/6000 series APUs and Ryzen Mobile Processors with Radeon Graphics (RDNA and later).
What should RX 5000 series users do about War Thunder timeouts?
AMD recommends rolling back to AMD Software 26.9.1 for users affected by War Thunder driver timeouts on RX 5000 series.