Nvidia control panel will do it for you. In fact you can go into the control panel and make it only use the dedicated GPU if you wanted to.
i had to go do that last night on the alienware former emu server i was playign with before i pawned it today (worth al ot more than its specs) After certain updates, and ANY vid card driver updates on that particular model, you have ot go into bios and disallow it from doing that, or else the vid card wont work. i discovered this after fighting with 3 diff hdmi cables and al lkindsa crap trying t ofigureo ut why it wouldnt play. Then, i found i ALSO had to then install a very specific nvidia driver that is no longer available on their site lol (the page is there if follow an old link but yo ucant search it and you cant download, i found it elsewhere) and was only a beta version of..idk what, in order to then get the sound to come out along with the video lol. yes, i know, but there was no option for digital audio or anything else til i did that. THEN i found that device manager had disabled like 6(??) audio "devices" within nvidia, that i then reenabled to get it all working.
There are a lotta weird things you discover when youre looking for very speciic information, like why that particular alienware wouldnt play hdmi or sound after that was fixed, or whether or not your bios supports the computer controlling which card is in use, etc. Sometimes it just seems silly the things we find that somehow get turned off, or on, and often times shouldnt even be an option or an issue lol.
Im kinda wondering about the 6gig "old" card, i mean it could be a few years old but its not exactly a 9800gt from 20 yrs ago lol. and 128gigs of ram..jesus, if eqs all youre gonna do and youre NOT gonna be playing dozens of accounts, thats overkill, but hey, invest in the future (i just wouldnt do overkill until electronics supply gets back to normal, prices are still insane for some things) The 2gig cards hubby bought in hawaii 8? 10? years ago still sell for $230 bucks and up. otoh, you can get 1gig cards (most anything thats not dualslot lol) for 6-8bucks on ebay lol.