You checked your build on a PC bottleneck calculator and the result came back: CPU bottleneck. Your GPU is powerful enough, but your processor cannot keep up — and your frame rates are paying the price.
The good news? You do not always need to spend money to fix it. Several effective solutions cost nothing at all. Here is exactly what to do, starting with the free fixes and ending with the nuclear option.
First — Confirm You Actually Have a CPU Bottleneck
Before changing anything, verify the bottleneck is real. Open MSI Afterburner during gameplay and monitor two numbers:
- CPU usage — if it stays near 95-100% consistently
- GPU usage — if it stays below 80% while CPU is maxed
That combination confirms a CPU bottleneck. Your GPU is waiting for the CPU to send it work. If both are near 100%, that is a balanced load — not a bottleneck. If only GPU is maxed, you have a GPU bottleneck, which is actually ideal for gaming.
Not sure which component is your bottleneck? Run your build through our free bottleneck calculator first.
Fix 1 — Enable XMP or EXPO in BIOS
This is the single most impactful free fix available — and most people never do it.
RAM does not run at its rated speed by default. A stick labeled DDR5-6000 is probably running at DDR5-4800 until you enable the correct profile in BIOS:
- Intel systems — Enable XMP (Extreme Memory Profile)
- AMD systems — Enable EXPO (Extended Profiles for Overclocking)
How to do it: Restart your PC → press Delete or F2 to enter BIOS → find the XMP/EXPO toggle → enable it → save and exit.
This alone can reduce a CPU bottleneck by 5-15% in memory-sensitive games because faster RAM reduces the latency between your CPU and the data it needs. Zero cost, five minutes, real impact.
Fix 2 — Close Background Processes
Your CPU handles everything running on your system — not just your game. Discord, Chrome, OBS, Windows Update, antivirus scans — every background process steals CPU cycles that your game needs.
Before launching a game:
- Press Ctrl + Shift + Esc to open Task Manager
- End any non-essential processes under the Processes tab
- Disable startup programs under the Startup Apps tab
- Set your game’s process priority to “High” by right-clicking it in Task Manager
On a CPU-bottlenecked system, clearing background load can recover 5-10 FPS in heavy scenes.
Fix 3 — Lower CPU-Heavy In-Game Settings
Not all graphics settings tax the GPU. Several settings hit the CPU hard and reducing them can significantly reduce CPU load without hurting visual quality much:
- Draw Distance / View Distance — reduces how far the CPU simulates the world
- NPC Density / Crowd Density — each NPC requires CPU processing
- Shadow Quality — CPU calculates shadow casting, GPU renders it
- Physics Simulation — runs almost entirely on CPU
Lower these settings first before touching GPU-heavy settings like texture quality or anti-aliasing. Your frame rate will thank you and you will barely notice the visual difference.
Fix 4 — Use DLSS, FSR, or XeSS
Upscaling technologies were designed to reduce GPU load — but they indirectly help with CPU bottlenecks too by reducing the overall rendering workload and allowing the CPU to stay ahead of the GPU more easily.
- NVIDIA DLSS 4 — best quality, RTX GPUs only
- AMD FSR 3 — works on all GPUs including NVIDIA
- Intel XeSS — AI-powered on Arc GPUs, fallback mode on others
Enable upscaling at Quality or Balanced mode in supported games. In CPU-bottlenecked scenarios, this can smooth out frame delivery even when raw FPS does not change dramatically.
Fix 5 — Update BIOS and Chipset Drivers
Outdated BIOS firmware and chipset drivers are one of the most overlooked causes of poor CPU performance. Manufacturers regularly release microcode updates that improve CPU scheduling, memory compatibility, and core efficiency.
Steps:
- Find your motherboard model (check the sticker on the board or use CPU-Z)
- Go to the manufacturer’s website — ASUS, MSI, Gigabyte, ASRock
- Download the latest BIOS version for your board
- Follow the manufacturer’s flashing instructions carefully
- Also update chipset drivers from AMD or Intel’s official site
This is especially important after a new game release that exposes CPU scheduling issues on older firmware.
Fix 6 — Increase Your Resolution
This sounds counterintuitive but it works. CPU bottlenecks are most severe at 1080p because lower resolutions put more of the workload on the CPU rather than the GPU.
Moving from 1080p to 1440p shifts more work onto the GPU, which reduces how hard the CPU has to work relative to the GPU. The CPU bottleneck percentage drops — sometimes significantly.
If you are gaming at 1080p with a mid-range or high-end GPU and seeing a CPU bottleneck, this is worth testing before buying any hardware. You can simulate this without a new monitor by checking your specific pairing at different resolutions using our PC bottleneck calculator.
Fix 7 — Upgrade Your CPU (Last Resort)
If you have tried everything above and the CPU is still maxed out, a hardware upgrade is the answer. Before buying, make sure you:
- Identify exactly which component is bottlenecking using MSI Afterburner during gameplay
- Check if your current motherboard supports a faster CPU — a drop-in upgrade is far cheaper than a platform change
- Consider the resolution you game at — upgrading CPU matters most at 1080p
For Intel users on LGA1700 — an i5-13600K or i7-13700K is often a strong drop-in upgrade depending on your current chip. For AMD AM5 users — a Ryzen 7 7800X3D is the gaming king of the platform due to its massive 3D V-Cache advantage.
Not sure if upgrading your CPU will actually fix your specific pairing? Check your exact combination on our free bottleneck calculator before spending anything.
Quick Recap — Fix CPU Bottleneck in Order
Start free, spend money only if necessary:
- Enable XMP/EXPO in BIOS
- Close background processes
- Lower CPU-heavy game settings
- Enable DLSS, FSR, or XeSS
- Update BIOS and chipset drivers
- Increase resolution to 1440p
- Upgrade CPU if nothing else works
Final Thoughts
A CPU bottleneck does not automatically mean you need a new processor. In most cases, a combination of free fixes — XMP, background process management, and game settings tweaks — will recover meaningful performance without touching your wallet.
If your bottleneck percentage is above 25% and free fixes are not helping, then a targeted CPU upgrade makes sense. Just make sure you know exactly what percentage you are dealing with before buying anything. Use our PC bottleneck calculator to check your build and get a clear answer.