[Righty27]

Not sure if covered already in this thread but the 'whining' issue (unclear how widespread e.g. if it only affects some units or if other users just less sensitive/susceptible or likely to highlight/investigate) appears to only affect Max versions.

The Ultra has a different cooling system, with a chunkier, more effective copper heatsink in lieu of the Max's aluminium unit. Last I read, it had not been established if the thermal designs differ in other ways (e.g. fans/venting), however considering the abundance of power available to these Macs and the likelihood that the Ultras have a higher threshold for the fans to spin up/increase speed, it seems reasonable that Ultra users are not reporting any issues.

This issue did come up soon after the first units shipped, so I wonder if the latest deliveries are still affected or if maybe Apple have made any changes since?!