"Chipset" needs some clarification ...
Core Intel chipset and IME and RST drivers are written by Intel. Intel will of course always have the latest-greatest versions of their own stuff. Support pages at companies like Asus might provide the latest revisions or might be inattentive and never update outdated revisions.
Chipset addons like ASMedia controllers and Realtek audio chips are made by companies like ASMedia and Realtek, who again always have the most recent revisions available for their own stuff. Companies like Asus and Gigabyte might custom program the programmable Realtek ALC1150 part, and they might provide extra Asus or Gigabyte software which adds features, but the actual driver code will always be written by Realtek.
Chipset addons like the ROG KeyBot microcontroller are made by Asus, so Asus is the place to look when you want the most recent wares.
The most recent stable version of each critical device driver can always be found through Windows Update, Microsoft-rebranded as WHQL Drivers to assure the masses that they've passed tons of "testing" and won't break your Windows.
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