If you have just received your RIG and are noticing that GPU's are not mining please ensure that you follow the process outlined in the installation & configuration documentation. 

Before Powering On 

Please open your rig and check ALL Connections.

As components or cables can get dislodged and become disconnected in transit. 

• Open case and ensure all cables are plugged in and secure. This can be done by removing the two black screws on the front fan fascia and the two screws on each side of the lid. The lid will then slide off. If you have a open air rig. It is simply by viewing all cables and connections. 
• Push blue cables into motherboard and ensure that blue cables are connected correctly to the bottom of the GPU (risers) You will need to perform this troubleshooting if you have also moved your rig from one location to another.