For some of them yes it is a visual but for others the overclocked remains the same even when i restart the map. I forgot to mention that doing this will also yield a free power core sometimes. The overclocked is not a visual and does impact the speed. I recorded a video of me showing off all the machines that i have that are impacted by it but unfortunately was unable to reproduce the problem. perhaps it is only in multiplayer that it works?(the person i play with is unavailable at the moment but when possible i will try it again)