When added a graphics card does intergrated graphics and graphics card work together?

[AwesomeIronman]

I am gonna buy Intel Pentium G4400 processor
which has Intel HD Graphics 510 and I think 1 GB of integrated graphics
If I add a graphic card after that (which my friend has given me)
would integrated graphics and graphic card work together
and eventually increase my graphics processing power?
I dont know which graphic card is that currently but
it is an old I think of only 512MB graphics card
if you can please tell which one it is - this are the words written on it:
SH6 94V-0 E248779 1148-4, on 4 memory chips/ICs : Elpida DDR3 128x8 and some serial codes

 

[Paul NZ]

Depends. On some motherboards you can enable the onboard video. In the BIOS. So you can use it and the card you install

On others it'll disable the onboard video

 

[OfficialG3]

no, an igpu and a dgpu cant work in tandem (unless its amd's apu, which could with certain gpu)
besides im pretty sure the igpu is actually stronger or atleast on par with that gpu you have, its just a rebranded gt 210 most likely

short answer = no it would not work together and increase the gpu power

straightforward answer = that igpu is stronger than that card, buy a better card if you do want better performance
simply put it = that card will slow it down, dont use it