I had a workshop install the new card. AFAIK it is not exactly the same as the old one, but is correct for the situation. There are no graphic problems – Sound settings show input is there but none of the options i try will give me sound out. I normally use jack plug to headphones or speakers as output.
I have an old iMac with Nvidia graphics that used to have similar issues on and off. It is in another location, but next opportunity I’ll see if headphone sound works with the 6.13.9 kernel (and the nouveau driver).
Easy things to check:
Dell firmware updates
UEFI/BIOS sound settings
Nvidia driver - the new card may need a newer driver
Edit: I ran the Sound Test on the iMac with headphones and got no sound because /etc/modprobe.d/alsa-base.conf requires a system-specific entry:
Some upgrade may have remove the file – it wasn’t present. You can check for a similar option for your system. Some Dell systems may need to be configured for a headset with microphone versus stereo headphones.