Thank you for joining the Intel communities.
The Intel® Compute Stick STK2m3W64CC comes with the Intel® Core™ m3-6Y30 Processor and this processor has the integrated graphics which is the Intel® HD Graphics 515.
You can take a look at it at the following link:
http://ark.intel.com/products/88198/Intel-Core-m3-6Y30-Processor-4M-Cache-up-to-2_20-GHz Intel® Core™ m3-6Y30 Processor (4M Cache, up to 2.20 GHz) Specifications
At that link you can see the all the specifications and resolution this processor support, also with all the different technologies that comes with it.