[M] Shuttle XPC nano Barebone NC40U5 Review
 

The Alder Lake Core i5-1235U SoC does offer impressive performance for the rated TDP, a notable step-up from the previous generation. The 15W TDP limit does decrease the clocks of the Performance and Efficiency cores by quite a bit, but the system will continue to perform very well. In light loads, we noted spikes at 4.4GHz for the Performance cores and up to 3.3GHz on the Efficiency ones, which can also exceed the rated TDP to about 18W, easily manageable by the Shuttle cooling system!

http://www.madshrimps.be/articles/article/1001470/