I recently wanted to make sure I was squeezing every ounce of available rendering power out of my system. If you have multiple GPU's you can view their resource percentage in the NVIDIA Control panel and CPU usage in performance. I assume most of you knew this already but wanted to share in case you didn't.
Great tip Chris ! It's always a good thing to check especially if you believe renders are taking a bit too long. I will add if there are GeForce users out there (Like Me) you won't find the GPU performance option in your Nvidia Control Panel. But, GPU-Z (Free) will show you your GPU Utilization. Task Manager will also show you your GPU and CPU utilization. Looks like I'm hitting on all Cylinders.