Diy Gpu Mining Frame . 2.4 meter length of 21mm x 21mm. They are approximately 10 inches apart and the board is about 12 inches long. Diy steel mining frame for 6 gpu mining cryptocurrency mining rigs from www.banggood.com 5 out of 5 stars (42) sale price $26.70 $ 26.70 $ 35.60 original price. A short video showing the dimensions for the mining rig frame that i built recently. This is the wooden mining rig i assembled using about $30 worth of wood.