Sounds like you have either a WarpEngine or a GVP GForce card. Make sure you use the installation software for each one, as each should come with it's own special 68040 libraries. Some accelerator cards also use software patches to bypass problems in the Amiga motherboard design. This is especially true in the A4000, which has a slow mb memory design. Without the proper libraries and patches for fast memory for instance, the 68040 will run not appreciably faster than a fast 68030 and maybe even slower if it uses the mb memory at normal speed.
