Hi Toni. It's the same for me on my Dell M4500 Precision workstation running Windows 8.1. The machine has a NVIDIA® Quadro FX 1800M GPU. Apparently, this GPU cannot run WebGL content in hardware, so it falls back to software rendering, resulting in very poor performance. It seems that Microsoft expect people to upgrade to reasonably recent GPUs in order to run WebGL content in hardware in IE. Presumably, this is related to security considerations. Personally, I decided to upgrade my laptop, which now runs WebGL content in IE just fine.