The A3630 is the replica of the Commodore A3630 CPU card for the Amiga 4000.
It features a full 68030 CPU and a 68882 FPU, both running at 25MHz by default.
When installing the board in an Amiga 4000 system, the A4000 CLKS (J100) motherboard jumpers need to be both set to the INT position:
The A3630’s CPU clock is fixed at 25MHz, however the FPU clock can be changed by installing a compatible 5V DIP crystal into the crystal socket and moving the FPUCLK jumper from INT to EXT.