With the introduction of the LUT Generation Size option within higher ColourSpace license levels there have been a few questions on PC specifications that can operate with such huge LUT sizes.

Note: In reality LUT sizes of 65^3 and 128^3 are already well beyond the point of diminishing returns.
The use of 256^3 and beyond LUTs really is a very specialised application.

However, most modern PCs are capable of 256^3 and beyond LUTs, other than really low power PCs.
For example, we have tested on a Microsoft Surface Laptop 3, with i5 CPU 4 Core, 8G RAM, Intel Graphics, which works well.
With the Win32 version of ColourSpace, for the best performance and to minimise memory issues a few settings have to be configured.

• Turn off all power/energy savings
• Set for best performance
• Run plugged-in, not on battery
• Disable other programs from running at start-up
• (Do not run other programs while using ColourSpace)
• Increase paging file size

For VMs running on Mac the VM resources allocations will likely need to be increased.
With an M1 Mac running Windows via VMware Fusion the following works well.

• 4 processor cores
• 4096 memory min
• Plus the same additional configurations as above

The Profile the LUT is being generated from will also have an impact on the PC's resource requirements.
If the display has a lot of volumetric issues, poor gamut coverage, etc., the processing demands made on ColourSpace will obviously be far greater.
The same with the size of the profile (the number of measurement points), as the more points the greater the processing requirements.
(In real life the number of points should never be an issue, as it would take excessively long measurement time to capture them with associated display/probe drift/stability issues, etc.)

Remember that 256^3 LUTs are extremely large, and it will not be possible to work with more than one at a time. For example, do not keep the LUT Generation window open while Uploading 256^3 LUTs.

The x64 version of ColourSpace has nullified such restrictions - see below.

Steve

With the upcoming release of 64 bit ColourSpace this whole discussion has changed.
The PC resource issues have basically been wiped away, and during testing I have generated 1024^3 3D LUTs!

That is MASSIVE, and of no real use to anyone.
But it shows there are really no limits with ColourSpace.

And now multiple 246^3 LUTs can be generated and worked on easily, without PC resources causing issues,

And it also means that large 1D LUTs extracted from large 3D LUTs is now totally viable.
That can be a big benefit with displays/LUT boxes/graphics programs with large 1D LUT capabilities independent of their 3D LUT options.

Additionally, generating a high resolution LUT, even when the final Uploaded LUT is smaller, has verifiable benefits, but to standard Nyquist sampling.
The smaller final LUT really will benefit from the larger initial generated LUT size.
(The information within the LUT Size page of the website has been updated to explain in detail the benefits of generating larger LUT sizes, even when the Uploaded LUT is smaller.....)

Steve