Overwatch Suddenly Drops to 3 FPS and Causes Extremely High Ping

The 700 ms latency may be a separate network issue from the 3 FPS. Test another game or a speed test while Overwatch is open, and try Ethernet if possible. Check Task Manager for downloads, updates, or another process using the network. For the FPS problem, temporarily lower the render scale and graphics settings; if performance remains at 3 FPS, it points more toward a driver, temperature, or hardware/configuration problem than normal game settings.

Because the PC previously needed to be unplugged after launching the game, check Windows Event Viewer and reliability history for hardware, driver, or display errors. Also update the motherboard BIOS and chipset drivers, but avoid changing several BIOS settings at once. If the system still locks up, test the memory and run a graphics stress test while monitoring temperatures, since a power, cooling, or unstable-memory problem could be exposed by this game.

Do a clean reinstall of the graphics driver, then reset Overwatch's graphics settings and clear its shader cache. You can also use the game's repair or scan option. A corrupted shader cache or driver update can affect one game while leaving everything else apparently normal. Make sure the game is using the RX 6600 XT rather than an unexpected display adapter.

Start by checking temperatures and clock speeds while the game is running with a monitoring tool. Watch the CPU and GPU temperatures, usage, and whether either component is throttling. Also check whether the CPU or GPU has an overclock or undervolt enabled, since unstable settings can cause freezes or severe performance drops. Your listed CPU speed also looks like it is boosting above the standard clock, so confirm everything is stable at default settings.