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If I had slightly more money I would buy one of the raptor systems just out of interest to try it out as a daily use machine.

IBM sells just the CPUs, is that right? So they are targeting mainframe or other enterprise applications. Whereas Raptor CS that you linked to is selling a desktop version. Other than hobby interest, could the desktop use case be for developers that are building applications for mainframes that use that CPU?

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I have a POWER9 system actually - it has a number of shortcomings that make it not so practical as a daily driver. For one, it doesn't go to sleep and draws 27Watt at a minimum. It also has no integrated graphics which means I need an AMD or NVIDIA graphics card which have spotty support at best on POWER...

Not to mentioned it takes anywhere between 90s and 5 minutes to boot. It spends over one minute doing init including things like training DDR4 and PCI-e serdes links.

Why did you buy yours? What is the OS you are using? Does it have any particularly interesting features or quirks?

IBM also cells POWER9 workstations: https://www.ibm.com/products/power-system-s914/pricing

IBM charges 11k for their 8 core POWER9 CPU alone...

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