AMD Driver Bug Silently Disables SAM on Windows 10

Gamers started seeing an unexpected pattern: sudden stutters, unexplained crashes, and a sense that something in the stack had quietly gone wrong. Frames drop. Sessions end. The common thread points to a recent AMD Adrenalin driver on Windows 10.

At the center of the chaos is Smart Access Memory, better known as SAM. The feature hands the CPU broader access to the GPU’s VRAM, removing choke points and boosting performance in supported titles. When SAM works, it feels like unclogging a highway during rush hour. When it doesn’t, traffic grinds to a halt.

According to user reports, a bug tied to Adrenalin version 26.1.1 is intermittently preventing Windows 10 from recognizing Radeon GPUs properly, and that misrecognition appears to disable SAM or Resizable BAR inside the Adrenalin app. Crucially, users say their BIOS settings—Resizable BAR and Above 4G Decoding—remain enabled, which makes the problem look less like a motherboard or firmware issue and more like a driver-level conflict.

Many affected players have managed a partial recovery by using DDU in Safe Mode to remove drivers completely, then performing an offline reinstall. That fixes the immediate detection and stability problems for a number of setups. But the relief is incomplete: after these clean reinstalls some users still find SAM toggled off inside Adrenalin despite the BIOS reporting it enabled.

If your games dip in performance after installing Adrenalin 26.1.1, check the Resizable BAR/SAM state in the Adrenalin app even when your BIOS shows the feature enabled.

Windows 10 also reports frequent hardware-change notifications for affected systems, which strengthens the case for a driver-side incompatibility. Since SAM is what lets the CPU address the full chunk of VRAM, its disappearance is enough to explain the frame-rate drops and instability players are experiencing.

Users trading tips online say a handful of quick workarounds can help: toggling monitor refresh-rate or re-enabling Variable Refresh Rate in Radeon software, and sometimes simply rebooting the system a couple of times. These are bandages, not cures. AMD has acknowledged the interference and is investigating; the company recently issued a preview driver (26.6.3) to address other Windows 10 compatibility concerns for RX 7000 cards, but this new SAM-related behavior appears tied to the 26.1.1 build.

Think of it as a software referee accidentally waving off a perfectly legal play. The hardware is ready. The firmware is set. The driver is the one that may be miscalling the game.

For now, cautious users should stick to clean driver installs using DDU when problems surface, double-check Adrenalin’s SAM/Resizable BAR switches after reinstall, and keep an eye on AMD’s driver notes for a formal fix. If you’re mid-campaign or in the middle of competitive play, you might prefer to roll back to a previously stable driver until AMD releases a definitive patch.

Keep your systems backed up and your patience handy; a fix is likely coming, and the next driver could be the one that stops the performance bleed.