I Built a GAMING PC Using only...CeX?

It is feasible to assemble a functional gaming PC using only secondhand components from CeX for approximately £36, provided the builder possesses the technical expertise to perform undervolting, driver tuning, and component troubleshooting.

• Base platform — Purchased a complete pre-built desktop for £13 to provide the necessary chassis, motherboard, and 250W power supply [00:50].
• Storage speed — Replaced the slow mechanical hard drive with a £2 solid-state drive, reducing operating system boot times from 10 minutes to 4 seconds [02:30].
• Graphics integration — Exchanged a faulty RX 5500 XT for an R9 380X, which necessitated undervolting to operate within the strict power limitations of the original power supply [09:50].
• Memory upgrade — Installed 8GB of higher-speed DDR3 RAM for £4, exceeding the capacity and bandwidth of the original OEM memory [15:20].
• Processing power — Upgraded the CPU to a Core i7-3770S for £12 to increase thread count and computational overhead for modern software [17:40].
• Net expenditure — Calculated a total cost of £36 after recouping £15 by selling the original RAM, processor, and graphics card [26:20].
• Gaming output — Achieved playable frame rates in demanding titles like Cyberpunk 2077 and GTA 5, sustaining between 30 and 60 frames per second at 1080p [38:50].
• Software compatibility — Validated that the hardware configuration functions on Linux, though it required configuration to maintain stability [55:10].

How does undervolting affect the lifespan and stability of older GPU architectures? What are the limitations of using a restricted power supply for modern gaming workloads?