The Cheapest Upgrade That Will Actually Give You More FPS

This is the most commonly missed step in PC gaming, and it costs 10–20% of your framerate when it's wrong. Out of the box, DDR4 and DDR5 boot at their JEDEC default speed (usually 2133 or 4800 MHz) instead of the speed printed on the module (3200, 3600, 6000, 6400 MHz). The higher speed is unlocked by a BIOS profile called XMP on Intel systems or EXPO/DOCP on AMD systems.

Reboot, enter BIOS (usually Delete or F2 at startup), find the memory settings, enable the XMP or EXPO profile, save, and reboot. Verify with CPU-Z or Task Manager > Performance > Memory that the frequency now matches your kit's rating. This one change is worth roughly one GPU tier of performance on any modern Ryzen or Intel Core system.

GPU drivers accumulate cruft over time — leftover files from old versions, corrupted shader caches, conflicting overlay software. The symptom is inconsistent stuttering that doesn't correlate with graphics settings. The fix is a clean driver install using Display Driver Uninstaller (DDU) in Safe Mode.

Download the latest driver directly from NVIDIA, AMD, or Intel, boot into Safe Mode, run DDU with 'Clean and shutdown', then boot normally and install the fresh driver. This resets everything to a known good state and often recovers a surprising amount of lost performance on systems that have been through multiple GPU generations without a clean sweep.

If your CPU or GPU is thermally throttling — hitting 90°C+ and cutting its clock speed to stay safe — you're losing framerate at the exact moment the game needs it most. Check temps with HWInfo64 during a demanding scene. If either component crosses 85°C sustained, thermals are the bottleneck.

Free fixes: clean the dust out of your case (compressed air, every 6–12 months), verify all case fans are spinning, and make sure the CPU cooler is properly mounted with fresh thermal paste. If those don't help, a $20–40 tube of quality thermal paste (Kryonaut, MX-6, PTM7950) and a fresh application often drops CPU temps 5–15°C. For laptops, an $20 laptop cooling pad frequently ends throttling entirely.

Resizable BAR (NVIDIA) and Smart Access Memory (AMD) let the CPU address the entire GPU memory space at once instead of in 256 MB chunks. The performance gain is 3–15% in supported games and it costs nothing but a BIOS toggle plus a driver setting.

Enter BIOS, find 'Above 4G Decoding' and 'Re-Size BAR Support', enable both, save, and reboot. On NVIDIA cards you may also need to enable Resizable BAR in NVIDIA Profile Inspector for games that don't auto-enable it. Verify with GPU-Z's 'Resizable BAR' status line.

If you're on 16 GB and hitching in modern AAA titles, a 2×16 GB dual-channel kit is $50–110 depending on DDR4 vs DDR5, and it's the single most cost-effective upgrade in PC gaming. Buy a matched kit, not two loose sticks — mixing modules frequently forces the whole system to run at the slowest module's specs, undoing the upgrade.

Do not add a third or fourth stick to an existing dual-channel setup on DDR5 unless you accept a significant frequency downclock. Modern DDR5 memory controllers get much less stable with four sticks populated, and you often lose the frequency you'd otherwise gain from more capacity. Replace the kit; don't extend it.

Windows 11 has several settings that quietly affect gaming performance. Enable Hardware-Accelerated GPU Scheduling (Settings > System > Display > Graphics > Change default graphics settings). Turn off VBS (Virtualization-Based Security) if you're not in a corporate environment — it costs 5–10% in CPU-bound games. Set your game's power plan to 'Ultimate Performance' or 'High Performance'.

Finally, disable any background overlay you're not using — Xbox Game Bar, Discord overlay, RGB software, browser extensions. Each one adds a small hitch cost, and stacked together they can be responsible for the majority of your stutter on an otherwise capable system.