It is a 3D model of AIO by Lian Li which is made in blender.The Zip Files contains all the fbx, blend and gltf files.However it is highly recommended to use the blend file because there are some issue while transfering emmision data and some shaders to fbx and gltf files.
Optional- If you wish to get the motherboard present in the preview, you can check out my profile and i can offer some discount on demand. Thanks. :D