HP Updates OMEN Desktops, Gaming Displays, and Command Center

[Valantar]

Proprietary:

• 1.
  relating to an owner or ownership.
  "the company has a proprietary right to the property"
  • behaving as if one owned something or someone.
    "he looked about him with a proprietary air"
• 2.
  (of a product) marketed under and protected by a registered trade name.
  "proprietary brands of insecticide"

If you look at the website it clearly shows H.P. branded Motherboard.
As for Bespoke, we don't know if H.P. made the Motherboard or commissioned it.

In computer hardware vernacular, proprietary generally is taken to mean "proprietary form factor" (or otherwise incompatible with relevant standards, e.g. through using proprietary PSU connectors) as any other meaning would be a distinction without a difference. After all, by your logic there is no such thing as a non-proprietary motherboard. If they used an Asus board it would then still be proprietary, just to Asus and not HP. There are no motherboard designs that do not exclusively belong to their makers after all, so proprietaryness (or the lack thereof) tends to indicate standards compliance.

Beyond this, all OEM desktops from large vendors (and even smaller ones like Acer) use custom motherboards. Bigger OEMs make them themselves (Dell and HP, likely Asus), smaller ones have them made (Acer, others) by someone who can design a board cheaply around the required specs. Only custom PC builders or truly tiny outfits use off-the-shelf motherboards. The HP logo on the board also tells us that it's bespoke: either it was made by HP for this product line (this is the most likely given HP's size; it might be used in others too, who knows?) or it was made by someone else for HP from their specs/requirements. Either way it is bespoke.

 

[Turmania]

I dont know about its technical specs but design wise i like the monitor.