I'm currently using a very old system with a GTX 460 4GB graphics card and an Intel Core i5-8400T. It's around a decade old now, and I'm wondering whether upgrading individual parts makes sense or if I should replace the whole computer. My budget is about S$4,000, which is roughly US$3,100.
3 Answers
Build a new rig, but don’t feel obligated to spend every dollar. A Ryzen 7 9800X3D-class CPU, 32GB of DDR5, a reliable 850W power supply, a 2TB SSD, and a Radeon RX 9070 XT-class GPU would already be an excellent 1440p gaming setup. Put the remaining money toward a good monitor, peripherals, or future upgrades instead of buying parts you won’t benefit from.
With a budget around US$3,100, I’d build a completely new system rather than upgrade the existing one. Your CPU platform, memory, graphics card, and likely power supply are all outdated, so replacing parts one at a time would leave you with limited upgrade potential. A modern Ryzen X3D processor, 32GB of DDR5-6000 memory, a current-generation motherboard, a 2TB NVMe SSD, and a high-end graphics card would make a much better long-term system.
You can upgrade gradually if replacing everything at once is inconvenient. An SSD is a good first step because it can move into a future build, but the old graphics card and processor will still be major bottlenecks. Since your budget is substantial, a full rebuild is the cleaner option and gives you a current platform with better performance and upgrade support.

A higher-end graphics card such as an RTX 5080 could fit within that overall budget, depending on local pricing and whether the monitor is included.