Like mentioned by the kernel try adding that to syslinux.cfg, on the main GUI page click on flash drive, scroll down to "Syslinux Configuration", make sure it's set to "menu view" (top right) and add this to your default boot option, after "append initrd=/bzroot"
nvme_core.default_ps_max_latency_us=0 pcie_aspm=off
e.g.:
append initrd=/bzroot nvme_core.default_ps_max_latency_us=0 pcie_aspm=off
Reboot and see if it makes a difference.