Game Bar itself typically uses very little ram. In most cases, you can expect about 30MB to 80MB of ram for game bar alone. Game Bar itself is lightweight, but the widgets in Game Bar are a different story. The widgets include Performance Widget (CPU/GPU/RAM/FPS monitoring), Audio Mixer, Capture, Etc. Microsoft designed them to update live system stats, stay pinned on screen, and in some cases continue updating even after the overlay closes. Depending on how Widgets are used, resource usage can range from almost nothing to well over 200MB on some systems. With Game DVR background recording enabled, memory usage can increase significantly. Depending on recording quality and duration settings, systems may use anywhere from roughly 200MB to 600MB of RAM for the recording.