I hope not, and then if I'm right and the GPU is more powerful than the Raspberry 4 one this board will run at 6W or something and then a stick-on heatsink wont do it...
Look at my link to the full copper one if I'm right:
http://www.enzotech.com/cnb_s1l.htm
I received it now and it's great (if it fits) well worth the expensive price!