My 12-year-old PC suddenly shut down while I was working and now will not power back on, so I need a replacement fairly urgently. I work professionally in game development and programming, with some computer science work and light gaming. My budget is around £800–£1,000, although I could potentially stretch to about £1,300 if that would make a significant difference. I would prefer parts available through Amazon UK for fast delivery and would like a simple black case. I already have a Corsair RM650e 650W power supply purchased in 2025, which I would like to reuse if it is suitable. I also need at least a 500GB SSD, but I do not need a monitor, keyboard, or mouse. I have an older Windows license key and would like to know whether it can be reused on the new system. What kind of build would offer the best balance for game development, programming, and light gaming within this budget?
3 Answers
£800–£1,000 is a tight budget for a new workstation that also needs to handle game development and gaming, especially if you want a reasonably capable dedicated graphics card. Increasing the budget to roughly £1,300 would give you considerably more flexibility and make it easier to choose newer parts rather than compromising heavily.
Before replacing the entire machine, try installing the new 650W power supply in the old PC. A system that suddenly loses power and shows no response at all often has a failed PSU, although the age of the rest of the hardware makes another component failure possible too. If the old system starts working, you may be able to keep using it while saving for a better replacement.
I replaced the old PSU about a month ago because the PC was crashing randomly. It worked until today, when it shut off and would not turn back on. Given that the system is around 12 years old, I am not too surprised that something else may have finally failed.
If you need to build immediately, an AM4-based system could offer good value because the platform and DDR4 memory are older and generally less expensive. It is several generations behind current platforms, though, so it is mainly worthwhile when keeping costs as low as possible. If you can temporarily repair or replace the failed part in the old PC, waiting may give you more options and avoid buying during an expensive period for memory and storage.

At the lower end of the budget, you will probably have to accept a modest graphics card or look at used components. A new build focused on development workloads can fit, but it will not leave much room for a powerful gaming GPU.