The Acceleration Card is an item added by Applied Energistics 2. It is used to increase the operation speed of devices.
When placed in a compatible device, instead of just permanently increasing the speed of the device, Acceleration Cards take time to fully speed up a machine. It pushes a machine faster and faster until it reaches its limit. If the device stops running, it resets back to its normal speed. More Acceleration Cards in a device will increase the rate at which the speed increases, as well as its max speed.