I'm getting an older family PC from around 2015 or 2016 and would like to clean it up and make it useful instead of leaving it unused. It currently has 6GB of DDR3 RAM in a 2GB + 4GB configuration, an older Intel Pentium processor, a hard disk drive, and a 450W power supply. What would you upgrade first? Also, what's the oldest piece of hardware you still use regularly?
4 Answers
I still use a workstation from around 2012 with a 12-core Xeon, 64GB of memory, an RTX 2060 Super, and SSD storage. It runs Linux well and handles everything I need. I’d start by checking the maximum supported RAM and fastest compatible CPU for your machine, then install an SSD. Those upgrades usually provide the best value for an older PC.
The biggest improvements would probably be replacing the hard drive with a SATA SSD and increasing the memory to at least 8GB, ideally using a matched 2x4GB kit or 2x8GB if the motherboard supports it. You could also check the motherboard’s CPU support list and look for an inexpensive quad-core processor. With Windows 10 or a lightweight Linux distribution, it should still be perfectly usable for basic tasks.
Before spending much money, check the power supply, clean out the dust, replace the thermal paste if necessary, and make sure the hard drive is healthy. An SSD will make the system feel dramatically faster, but a lightweight Linux desktop may be a better fit than a modern operating system if the Pentium is particularly weak. I’ve seen old Pentium 4 machines remain useful with lightweight Linux builds and just 1GB of RAM.
Older systems can still be great for retro games and simple media-center duties. I still use an Athlon XP machine for older games, although I’m always a little suspicious of its power supply. If the PSU is very old or from an unknown brand, replacing it is worthwhile before adding upgrades.

Thanks for the advice! I’ll check the motherboard’s supported CPUs and look into an SSD first.