To check your VRAM on Windows, you don't need any extra software, you can do it through the built-in settings. Press the Windows key and R to open the Run dialog, then type dxdiag and press Enter. This will open the DirectX Diagnostic Tool, where you can find the information you're looking for under the Display tab. Look for the "Approximate Total Memory" or "VRAM" entry, this will show you how much video memory your graphics card has. Alternatively, you can also check the Device Manager, by pressing the Windows key and X, then select Device Manager, find your graphics card under Display Adapters, right-click it and select Properties, then click on the Details tab.