Incomplete, erratic, desktop P.C. (New Harbour PA3)

An old P.C., perhaps from 2015, worked most of the time up to last month.

It has many problems:
• It shuts down intermittently - perhaps there is overheating or power supply problem.
• Not compatible with Windows 11, we used Windows 10.
• There is no storage supplied.

What is included:
• NZXT H440 Mid Tower Case - Black + Red (grubby, needs a wipe)
• Gigabyte GA-Z170-HD3 motherboard
• i7-6700K at 4Ghz
• 16 Gb RAM
• NVIDIA GeForce GTX 980Ti (6GB)
• Power supply

Again this P.C. will only work if you can supply the missing parts and/or fix the problem that makes it shutdown. Otherwise you could use the parts.