Hi,

You will also like to take a look at and try to draw conclusions after analyzing the stats from the results of various DMVs available.

sys.dm_os_wait_stats and schedulers to identify if there is really a CPU pressure.

Use sys.dm_os_performance_counters to get values on CPU usage in SQL itself. Output for each can be saved in a temp table for later analysis.

For my better understanding can you elaborate why you are looking for details to add node ?

Regards