MagnusL3D

Isnt KB5077179 for 26H1 which seems to be a bit special? Not sure I can/should upgrade to it even with a 9950x / 5090 RTX
https://techcommunity.microsoft.com/blog/windows-itpro-blog/what-to-know-about-windows-11-version-26h1/4491941 [techcommunity.microsoft.com]

Windows 11, version 26H1 will only be available on new devices with select new silicon as they come to market in early 2026.

johnmather
You may be able to create a profile in Nvidia Control Panel that will apply when Houdini is active.

For what it's worth I just got a new super silent computer with a 5090 and ran into this, the rest of the computer is so silent that when I rotated the viewport I would hear, granted rather low, coil whine from the 5090. But as John suggested, forcing vsync and it was gone. Thanks a lot !

Allright figured out what was causing the issue. Display Options 3D Textures Limit Resolution was unticked which caused the massive RAM usage. Clicking that and it is all good again.