Device manager shows four same A8-7410 processors and 2 display adapters - one "AMD Radeon R5 Graphics", and one "AMD Radeon R5 M330".
Why is this? Everything came built-in with the laptop + licensed windows 10.
That is correct.
Windows shows each processor core, and you have built in graphics on apu & separate graphics on the 330.
In what case could this be useful? Let's say i want to turn on a game (dirt rally) - are those things better then if i had one of each? If they are - how? goodplay
The link supplied by kingfish gives a basic explanation of use for the 2 graphics chips. Do a web search if you want more in depth info.
Same for 'cpu cores', web search has many basic/in depth articles.
It's called switchable graphics...you can google it.
And here's how it works:
Configuring Laptop Switchable Graphics on a Windows® Based System | AMD
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