Some how it added (There are currently no downloads available for), to the real question. What I wanted to know was how many MST hub splitters can I use with the lap top I have. ProBook 640 G2, I know it has 8 GB of RAM, i5-6300U CPU @2.40GHz 2.5GHz which I think is the video card Intel(R) HD Graphics 520 running Win 10.
An MST hub will split the total bandwidth coming from video port on the laptop...
Your CPU with Intel® HD Graphics 520 supports up to 3 displays and this includes the integrated display (https://ark.intel.com/content/www/us/en/ark/products/88190/intel-core-i5-6300u-processor-3m-cache-up...), so most likely you will be able to add 2 external displays in basic configurations, and I guess that is all Intel can say. The CPU is integrated into a non-Intel system and could be other OEM (HP) limitations.... Also, Intel does not support adapters, hubs, etc, they cannot test all of them on third-party systems (non-Intel laptops but HP, DELL, Acer, etc...).
So the best would be to check this directly with HP support (this is a question regarding a specific HP system....) Also, based on HP website, it seems to come with two graphics cards (Intel HD Graphics 520 and AMD Litho Pro AMD) https://support.hp.com/us-en/document/c04910208#AbT2 Another reason why this inquiry can be (must be) answered by HP support for more accurate information.