The most expensive computers ever built have an eye watering price tag and some seriously impressive performance metrics.

You’re not likely to achieve 4K or even 1440p gaming with most cheap desktop computers ... That means you pay $797, which is still expensive but much better value for what you’re getting.

Apple's iMac Pro, its most powerful and expensive computer, went on sale on Thursday. The desktop, which is intended for professional users like photographers and developers, starts at $5000.