new hardware was not made with win 7 support. just like it does not have win xp, win 98, win 95 and so on support. they support what MS supports at the time.
you might get lucky and look up each component individually and see if they have a win 7 driver for it. this is how i go about it myself when trying to do what you are doing.
identify the wifi card in it and go to that product site and look for win 7 driver, then specific gpu, ethernet and so on. can't guarantee they'll have drivers for it but it's really the only shot you have trying to put old OS on new hardware.
finally as a last ditch effort, you can try a vista or win 8 driver if it is available. sometimes they work on win 7. though you may have to modify the ini file to get win 7 to allow it to be used. advanced tactics for sure but you're not trying a basic thing either