Low GPU Usage but Low FPS? Bottleneck Fix Guide

Low GPU usage but low FPS is one of the most confusing problems for PC gamers. You buy a powerful graphics card, launch a game, and expect high frame rates. Instead, the game feels slow, the FPS stays low, and your GPU usage is only 40%, 50%, or 60%.

Many beginners think low GPU usage means the graphics card is broken. In most cases, that is not true. Low GPU usage usually means something else is stopping your GPU from working at full power. It could be your CPU, RAM, VRAM, storage, game engine, frame limit, driver settings, background apps, or even the resolution you are playing at.

This guide explains why GPU usage can stay low while FPS is also low, how to identify a CPU bottleneck, and what you can do to improve gaming performance.

Before upgrading anything, you can also test your build with the PC Bottleneck Calculator to check whether your CPU, GPU, RAM, and resolution are balanced.

What Does Low GPU Usage Mean?

GPU usage shows how much of your graphics card is being used while gaming. If your GPU usage is near 95% to 100%, your graphics card is working close to its full limit. This is common in GPU-heavy games, high resolutions, and high graphics settings.

Low GPU usage means your graphics card is not being fully used. This can happen for normal reasons, such as FPS caps or light games. But if your FPS is also low, then something is likely limiting performance.

For example, if your GPU usage is 50% and your FPS is only 45, your graphics card has unused power. The problem is that another part of the system is preventing it from producing more frames.

Is Low GPU Usage Always Bad?

Low GPU usage is not always bad. If you are playing an old or lightweight game and already getting smooth FPS, low GPU usage is normal. Your GPU does not need to work hard when the game is easy to run.

Low GPU usage can also be normal if:

You have enabled V-Sync
Your FPS is capped
Your monitor refresh rate is low
The game is not graphically demanding
You are in menus or loading screens
You are playing at low resolution
The game engine has FPS limits

However, low GPU usage becomes a problem when your FPS is also low, gameplay feels stuttery, and your GPU is not being fully used.

Main Reasons for Low GPU Usage but Low FPS

There are several reasons why your GPU may not reach high usage during gaming. The most common causes are CPU bottlenecks, RAM problems, VRAM limits, wrong settings, driver issues, and game optimization problems.

Let’s break them down one by one.

1. CPU Bottleneck

A CPU bottleneck is one of the biggest causes of low GPU usage and low FPS. Your CPU prepares game instructions, physics, AI, world simulation, draw calls, and frame data. The GPU cannot render frames until the CPU sends enough work.

If your CPU is too weak, too old, overheating, or overloaded, it cannot feed the GPU fast enough. As a result, your GPU waits instead of working at full usage.

Common CPU bottleneck signs include:

Low GPU usage
High CPU usage
Low FPS even at low settings
Stuttering in busy areas
FPS drops in open-world games
Poor 1% low FPS
Little improvement after lowering graphics settings

This often happens in 1080p gaming because the GPU can render frames quickly, so the CPU has to work harder to keep up. It is also common in competitive games, simulation games, strategy games, multiplayer games, and open-world titles.

For a deeper explanation, read the CPU vs GPU Bottleneck Guide.

2. Playing at Low Resolution

Resolution changes how hard your GPU works. At 1080p, the GPU has fewer pixels to render compared to 1440p or 4K. This means your CPU can become the main limit more easily.

If you pair a strong GPU with an older CPU and play at 1080p low settings, your GPU may not reach high usage because the CPU cannot send enough frames.

This is why some users increase resolution or graphics settings and see GPU usage rise. That does not always mean FPS will improve, but it confirms that the GPU was not the original limit.

Basic pattern:

1080p: more CPU-sensitive
1440p: more balanced between CPU and GPU
4K: usually more GPU-heavy

If you want to check whether your PC is ready for a specific game and resolution, read Can My PC Run This Game?.

3. FPS Cap, V-Sync, or Refresh Rate Limit

Sometimes low GPU usage is caused by a simple FPS limit. If your game is capped at 60 FPS, your GPU may stop working harder once it reaches that limit.

Check these settings:

In-game FPS cap
V-Sync
Nvidia Control Panel frame limiter
AMD Radeon Chill or frame limiter
RivaTuner Statistics Server limit
Monitor refresh rate settings
Game launcher settings

If your monitor is set to 60Hz but supports 144Hz or 165Hz, your system may not display the higher frame rate properly. Go to Windows display settings and make sure your monitor refresh rate is set correctly.

4. RAM Bottleneck

RAM can also cause low FPS and poor GPU usage. If your system memory is full or running slowly, your CPU may struggle to process game data efficiently. This can reduce GPU usage because the GPU is waiting for the rest of the system.

RAM bottleneck signs include:

Stuttering after playing for a while
High RAM usage
Slow loading
Background apps freezing
Sudden frame drops
Poor performance when browser or Discord is open

For modern gaming, 16GB RAM is usually the practical minimum. 32GB is better for heavy multitasking, streaming, newer AAA games, and modded games.

Also check whether XMP or EXPO is enabled in BIOS. Many RAM kits run at slower default speeds until you enable the correct memory profile.

5. VRAM Bottleneck

VRAM is the dedicated video memory on your graphics card. If your game needs more VRAM than your GPU has, you can experience stuttering, texture pop-in, and unstable FPS.

A VRAM issue can sometimes look like a general GPU problem. Your GPU may not behave normally because it is constantly swapping texture data instead of rendering smoothly.

VRAM bottleneck signs include:

Textures loading slowly
Blurry textures
Stuttering when entering new areas
FPS drops with ultra textures
Poor ray tracing performance
High VRAM usage close to the limit

If you are playing at 1440p, 4K, or ultra texture settings, VRAM becomes more important. Read the full VRAM Gaming Guide to understand how much VRAM you need.

6. Game Engine Limitations

Not every game can use your hardware perfectly. Some games are limited by their engine, poor optimization, single-thread performance, or old code. In these cases, your GPU usage may stay low even if your PC is powerful.

This is common in:

Older games
Bad PC ports
Early access games
Large open-world games
Simulation games
Strategy games
Games with heavy AI or physics

If only one game has low GPU usage, the game itself may be the issue. If every game has the same problem, your system settings or hardware balance are more likely to blame.

7. Background Apps and Overlays

Background apps can reduce performance by using CPU, RAM, disk, or GPU resources while you play. Some overlays can also cause stuttering or frame pacing issues.

Check for:

Browser tabs
Discord overlay
Steam overlay
Xbox Game Bar
Recording software
RGB software
Antivirus scans
Windows updates
Game launchers
Hardware monitoring overlays

You do not need to remove every app, but closing unnecessary background processes can improve frame stability.

8. Thermal Throttling

If your CPU or GPU gets too hot, it may reduce clock speed to protect itself. This is called thermal throttling. When throttling happens, your FPS can drop even if your hardware is normally powerful enough.

Common signs include:

FPS starts good, then drops later
Laptop performance gets worse after a few minutes
Fans become very loud
CPU or GPU clocks drop under load
Temperatures stay very high

Fixes include cleaning dust, improving airflow, changing thermal paste, adjusting fan curves, using a cooling pad for laptops, and making sure your case has proper intake and exhaust fans.

9. Wrong Power Settings

Windows and GPU driver settings can also limit performance. If your PC is using a power-saving mode, your CPU or GPU may not boost properly.

Check these settings:

Windows power mode: Best Performance
Laptop plugged into power
Nvidia Power Management Mode: Prefer maximum performance for specific games
AMD performance tuning settings
Disable battery saver while gaming
Check motherboard power limits

Gaming laptops are especially sensitive to power settings. A laptop running on battery may heavily limit GPU performance.

10. Driver Problems

Old or broken drivers can cause low GPU usage, stutters, crashes, and poor FPS. Updating your GPU driver often helps, especially for newer games.

Try these steps:

Update GPU drivers
Update chipset drivers
Update Windows
Restart after installing drivers
Use clean driver installation if needed
Roll back the driver if a new driver creates problems

If the issue started after a driver update, a rollback may be better than staying on the latest version.

How to Check What Is Causing Low GPU Usage

To fix low GPU usage, you need to identify the actual limit. Do not guess blindly.

Use a monitoring tool and check:

GPU usage
CPU usage per core
RAM usage
VRAM usage
CPU temperature
GPU temperature
CPU clock speed
GPU clock speed
FPS and frame time graph

Here is a simple diagnosis:

If CPU usage is high and GPU usage is low, you may have a CPU bottleneck.

If GPU usage is high and FPS is low, your GPU is likely the limit.

If RAM usage is full, system memory may be causing stutters.

If VRAM usage is full, lower texture quality or resolution.

If temperatures are high and clock speeds drop, thermal throttling may be the issue.

If only one game has the problem, the game may be poorly optimized.

You can also use the Best Hardware Bottleneck Tool guide to understand how bottleneck analysis works.

Best Fixes for Low GPU Usage but Low FPS

Here are the most useful fixes in the right order.

Fix 1: Remove FPS Caps

Check in-game settings, driver settings, and third-party tools. Disable unnecessary FPS caps and V-Sync for testing. After testing, you can turn limits back on if you want smoother frame pacing.

Fix 2: Set the Correct Refresh Rate

Go to Windows display settings and confirm your monitor is running at the highest supported refresh rate. Many gamers buy a 144Hz monitor but accidentally leave it at 60Hz.

Fix 3: Increase Graphics Settings for Testing

If GPU usage is low at 1080p low settings, try increasing texture quality, shadows, anti-aliasing, or resolution scale. This can shift more workload to the GPU.

This does not always increase FPS, but it helps you understand whether the game is CPU-limited or GPU-limited.

Fix 4: Close Background Apps

Close browser tabs, overlays, launchers, recording software, and unnecessary apps. Then test the game again.

Fix 5: Enable XMP or EXPO

If your RAM is running at default speed, enabling XMP or EXPO can improve CPU-limited gaming performance. This is especially useful for high-FPS gaming.

Fix 6: Lower CPU-Heavy Game Settings

If you have a CPU bottleneck, lowering GPU-heavy settings will not help much. Instead, lower settings like:

Crowd density
Traffic density
Physics
Simulation distance
View distance
Object detail
AI count
Background world activity

These settings can reduce CPU load and improve frame stability.

Fix 7: Lower VRAM-Heavy Settings

If VRAM is full, lower:

Texture quality
Ray tracing
Shadow resolution
High-resolution texture packs
Resolution scale
Anti-aliasing
View distance

Texture quality is often the biggest VRAM setting.

Fix 8: Improve Cooling

Clean your PC, check fans, improve airflow, and monitor temperatures. If your CPU or GPU is thermal throttling, cooling improvements can restore performance.

Fix 9: Update Drivers

Update your GPU driver, chipset driver, and Windows. For new games, driver updates can improve performance and stability.

Fix 10: Check CPU and GPU Balance

If the issue continues, your hardware may not be balanced. A powerful GPU paired with an old CPU can create low GPU usage. A weak GPU paired with a strong CPU can create low FPS at high settings.

Use the How to Find Bottlenecks in My Gaming PC guide to diagnose the problem more clearly.

Should You Upgrade Your CPU or GPU?

Upgrade your CPU first if:

GPU usage is low in most games
CPU usage is high
You play competitive games at high FPS
You get stutters even on low settings
Your CPU is several generations old

Upgrade your GPU first if:

GPU usage is near 100%
FPS improves when you lower graphics settings
You want 1440p or 4K gaming
You want ray tracing or higher visual quality
Your VRAM is too low

Upgrade RAM if:

You have 8GB or less
RAM usage is always full
You multitask while gaming
You play modded or open-world games
You want better long-term stability

For more performance tips, you can also read 7 Game Optimization Bottleneck Solutions.

Final Thoughts

Low GPU usage but low FPS usually means your graphics card is not the real problem. Something else is limiting your system before the GPU can reach full usage. The most common reason is a CPU bottleneck, but RAM, VRAM, storage, drivers, thermal throttling, FPS caps, and game optimization can also cause the issue.

Start by checking CPU, GPU, RAM, VRAM, temperatures, and frame times. Then remove FPS caps, close background apps, update drivers, enable XMP or EXPO, and adjust the right game settings.

If the issue is caused by hardware imbalance, use a bottleneck calculator before upgrading. This helps you avoid wasting money on the wrong part and makes it easier to build a balanced gaming PC.

Frequently Asked Questions

Why is my GPU usage low but FPS is also low?

Low GPU usage with low FPS usually means another part of your system is limiting performance. The most common cause is a CPU bottleneck, but RAM, VRAM, thermal throttling, FPS caps, drivers, and game optimization can also cause the issue.

Is low GPU usage a CPU bottleneck?

Low GPU usage can be a sign of a CPU bottleneck, especially if CPU usage is high and FPS does not improve after lowering graphics settings. However, you should also check RAM, VRAM, temperatures, and FPS limits before deciding.

Should GPU usage always be 100% in games?

No, GPU usage does not always need to be 100%. If the game is lightweight, capped at a certain FPS, or limited by the CPU, GPU usage may stay lower. High GPU usage is normal in demanding games, but low usage is only a problem when FPS is also low.

How do I fix low GPU usage in games?

Start by removing FPS caps, disabling V-Sync for testing, setting the correct monitor refresh rate, closing background apps, updating drivers, enabling XMP or EXPO, and checking CPU/GPU temperatures. If the CPU is the limit, lower CPU-heavy game settings.

Can RAM cause low GPU usage?

Yes, RAM problems can reduce GPU usage. If your system memory is full or running slowly, the CPU may struggle to feed the GPU properly. This can lead to stuttering, low FPS, and poor GPU utilization.

Can VRAM cause low FPS?

Yes, low VRAM can cause stuttering, texture pop-in, blurry textures, and FPS drops. This is more common at 1440p, 4K, ultra textures, ray tracing, and high-resolution texture packs.

Why is my GPU not using 100% at 1080p?

At 1080p, the CPU often becomes more important because the GPU has fewer pixels to render. If your CPU cannot prepare frames fast enough, GPU usage may stay low even with a powerful graphics card.

Should I upgrade my CPU if GPU usage is low?

You should consider a CPU upgrade if GPU usage is low in many games, CPU usage is high, FPS is unstable, and lowering graphics settings does not help. Use a bottleneck calculator first to confirm whether your CPU and GPU are balanced.

For the complete picture, work through our best GPU bottleneck guide in 2026.

Low GPU Usage but Low FPS? Causes, Bottlenecks & Fixes for Gaming PCs