In the specification on the Khadas website and A311D2 Datasheet, the Mali-G52 mp8 (8ee) graphic accelerator is indicated. This involves the presence of 8 graphic core.
Tests are shown Mali-G52, 4 Core (AIDA 64), or directly, Mali-G52 mp4 (Device Info HW).
Why is this happening and how many graphic core are in reality?