Did you try reinstalling drivers?
Microcrap and Wintoys might have just automessed something once again...
https://forums.overclockers.co.uk/threads/problems-with-built-in-sound-card-windows-10-pro.18879741/
If you mean GSX1000 it's not even at level of SB Z, or actually even Audigy Fx in D/A coversion quality.
Because its cheap sound chip is meant for cheap phones/tablets.
Naturally it doesn't have any more headphone amplifier either than those devices.
Sound Blaster X3 is tech wise around SB Z level in DAC and what seems to be little better headphone output.
Because of physics customized HRTF would certainly give better directionality for people with head shape differing more from average.
But mostly Creative has been doing half assed job in aiming it mostly for music instead of gaming and neither there are much settings for it besides enabling/disabling it.
Though Creative has updated algorithm and older processing and HRTF are there with their settings.
SBX AE-5 and G6 are tech wise overall pretty equal and very good and capable to driving most headphones you could buy.
Feature wise I rank SBX G6 ahead:
Besides volume control (lacked by way too many expensive keyboards) it also has those other physical controls.
That allows very easy disabling of processing, if wanting to listen music directly/having binaural recordings and equally easy enabling processing for games/movies.
In internal sound card you need to open software for doing that setting change.
