This is the TUL Backplate.

This custom Backplate was designed by TUL, the manufacturers of the VCU mining boards and BCU/VCU Water Block, specifically for effective heat dissipation which is critical in mining. It lets you run faster bitstreams, and extend the lifetime of your board.

• Cools the critical LTC3884 power regulator
• Compatible with VCU-1525, BCU-1525, BTU9P and ECU9P.
• Vetted and tested by FPGA.guide

Additional Notes:

• In Stock
• Shipped from Taiwan
• First batch will be shipping out in March