VRAM
VRAM is the dedicated high-bandwidth memory on a graphics card that holds textures, geometry, and render targets for the GPU to access directly.
Also known as video memory, graphics memory, frame buffer memory
Not measurable from a browser
A browser cannot read temperatures, power draw, fan speed, VRAM capacity, clock frequency or native FLOPS. For a direct reading use a native monitor such as HWiNFO64, GPU-Z or lm-sensors. SystemCheck contributes the other half: whether the condition is costing you throughput, measured as decay and consistency.
GPUs need bandwidth in the hundreds of gigabytes per second, which is why they carry their own GDDR or HBM rather than sharing system RAM. Capacity determines what fits; bandwidth determines how fast it can be streamed. Both matter, and a card can be short on either.
Running out of VRAM is a distinctive failure. Frame rate does not degrade gracefully. Instead you get periodic severe stutters as assets are evicted and re-fetched over PCIe, texture pop-in, and 1% lows that collapse while the average frame rate still looks acceptable. Anyone diagnosing stutter should check VRAM occupancy before anything else.
A browser cannot read your VRAM capacity or current usage. WebGL and WebGPU deliberately hide it, and any site claiming to detect it is guessing from a GPU name string. SystemCheck does not report VRAM. Use GPU-Z, Windows Task Manager's dedicated GPU memory graph, or your vendor's control panel for capacity and occupancy. SystemCheck's contribution is measuring the frame-time instability that a VRAM shortfall produces.
Related terms