GPU binding issue on Acer Nitro AN16-41, freezes with 2 beeps, only boots with Auto-select

Hi tutis1111,

Thanks for clarifying what you’ve already tried — that helps narrow the scope. Since the issue persists even after clean driver reinstalls, BIOS update, and OS reinstall, we can focus on hardware‑level or firmware‑level causes.

A few next steps to help isolate the fault:

1. Check PCI Device Status
   • In Device Manager → View → Devices by connection, expand the PCI Express Root Port branches and locate the RTX 4070.
   • Confirm it’s enumerating correctly without error codes when idle and when attempting to switch to dGPU.
2. AC Power Event Replication
   • With the AC adapter connected, launch a GPU‑intensive app and monitor GPU usage in Task Manager.
   • Gently unplug AC and re‑plug — note if the binding loss happens instantly or only after a restart.
3. NVIDIA System Event Log
   • Open Event Viewer → Windows Logs → System and filter for “nvlddmkm” or “Display” events around the time of the freeze/beep.
   • This can reveal whether the driver is timing out (TDR) or the PCIe link is dropping.
4. Thermal / Power Rail Check
   • If possible, run HWiNFO64 (Sensors only) and log GPU voltage, clocks, and PCIe link speed before and during the fault.
   • A sudden drop to PCIe x1 or x2 can indicate a hardware lane issue.

If the GPU is intermittently failing to enumerate or dropping PCIe lanes, that’s a strong case for a warranty claim — especially since the fault began within weeks of purchase and is reproducible.

Let’s see what the PCIe status and event logs show — that will tell us whether we’re chasing a driver handshake problem or a physical GPU/board fault.

On your “no such option” point — the reinstall path via Windows Update only appears if you first uninstall the current NVIDIA driver, then check under Settings → Windows Update → Advanced options → Optional updates → Driver updates. If the driver is already the latest, Windows won’t list it until you remove it. Likewise, Acer’s support page for your model does list the NVIDIA package, but it won’t be labeled as a “reinstall” button — you simply download and run it over the existing install.