However, it is the PC handheld that has felt the most detached ... I wasn't met with any baked-in software. I did find Zotac's software pre-installed, but it was a much older version than the ...

Okay, here's the current RTX 5090 stock situation in a nutshell - Nvidia has a bunch of models by Gigabyte and Zotac listed at ... but it currently only has pre-build PCs with the GPU inside.