My current PC has a Ryzen 9 3900X, an RTX 3080, 32GB of DDR4 running at 2133 MT/s, and roughly 3TB of storage spread across four SSDs. Some CPU-heavy games, including simulation titles, are giving me lower FPS than expected, and I'm trying to figure out whether the processor is the main bottleneck. Should I upgrade the CPU, improve the memory speed first, or replace other components as well?
4 Answers
The 3900X is still a capable processor, so the best upgrade depends on your actual frame-time data. Monitor GPU usage, individual CPU-core usage, RAM usage, and FPS while playing. If the GPU is well below full usage and one or more CPU threads are saturated, a 5800X3D or 5700X3D should help considerably. If the GPU is near 95–100% usage, a CPU upgrade probably will not change much at your current settings and resolution.
For a gaming-focused upgrade while keeping the same motherboard and DDR4 memory, the Ryzen 7 5800X3D is the strongest straightforward choice. A 5700X3D is also worth considering if it is substantially cheaper. Check your BIOS version and update it before installing a Ryzen 5000-series CPU. Your X570 Aorus Elite should support these processors with the appropriate BIOS.
Before replacing the CPU, check why the memory is running at 2133 MT/s. That is usually the default speed, and your kit may support a higher rated speed through the motherboard’s XMP or DOCP setting. DDR4-2933 to DDR4-3600 is a more typical range for Ryzen, and improving it could noticeably help minimum FPS in CPU- and memory-sensitive games. Test stability after changing the setting rather than assuming the overclock worked.
The 2133 figure came from Task Manager, so it may just be the default setting. I’ll look for the XMP or DOCP option and test the games again before upgrading.
A new platform such as a modern Intel or AM5 system can be faster for both gaming and productivity, but it would require a new motherboard and likely new memory. Since you already have an X570 board, a 5800X3D-class drop-in upgrade is usually the better value unless you also need a major boost in non-gaming workloads.
I’m using an X570 Aorus Elite, so I’ll check its BIOS support before buying anything.