The U55C card is compliant with the PCIe CEM rev.3.0 specification as single slot, full height, half length cards.
| Parameter | Dimension |
|---|---|
| Height | 4.375 inch (111.15 mm) |
| PCB thickness (± 0.13 mm (0.005 inch)) | 0.62 inch (1.57 mm) |
| Primary side width | 0.570 inch (14.47 mm) |
| Secondary side width | 0.105 inch (2.67 mm) |
| Length | 6.60 inch (167.65 mm) |