PC bottleneck calculator

Free CPU + GPU bottleneck calculator. Compare our LEVVVEL Score for each part at 1080p, 1440p, and 4K to see which component limits your build.

By Updated

Your build

AMD Ryzen 7 7800X3D

8C / 16T · up to 5 GHz · 120 W · AM5 · 96 MB L3

AMD Radeon RX 9070 XT

16 GB GDDR6 · 256-bit · 4,096 shaders · PCIe 5.0 x16

Pick a title to judge balance for that game, or leave on Any game.

Typical presets

LEVVVEL Score, combined from multiple benchmarks. Specs shown for planning only.

BalancedWell matched
AMD Ryzen 7 7800X3DAMD Radeon RX 9070 XT

Ryzen 7 7800X3D + RX 9070 XT

Balanced at 1440p — neither side is holding the other back in a meaningful way.

−100% CPU limitingBalanced+100% GPU limiting
0%
−100%0%+100%

Bottleneck gap

~9%

Limiting side

Balanced

CPU index

100

LEVVVEL Score 100

GPU index

109.8

LEVVVEL Score 109.8

AMD Ryzen 7 7800X3D

CPU specs

Cores / threads
8 / 16
Clock (base / boost)
4.2 / 5 GHz
TDP
120 W
Socket
AM5 (LGA 1718)
L3 cache
96 MB
Architecture
Raphael (Zen 4)

Price comparison

AMD Radeon RX 9070 XT

GPU specs

Memory
16 GB GDDR6
Bus width
256-bit
GPU clock
2970 MHz
Memory clock
2518 MHz
Shaders
4,096
Interface
PCIe 5.0 x16

Price comparison

Purchases through our links may earn us a commission.

What this means

This pairing looks well matched at the selected resolution for this workload. Spend on the display, storage, or cooler before chasing a one-sided upgrade.

Performance across resolutions

A pair that looks CPU-limited at 1080p can flip toward GPU-limited at 4K. Tap a card to focus that resolution.

Popular pairings

LEVVVEL Score is our meta score, combined from multiple benchmarks (Ryzen 7 7800X3D = 100 for CPUs, RTX 5070 = 100 for GPUs), then weighted by resolution and game factor. Estimates for planning — not a substitute for in-game utilization overlays.

A PC bottleneck calculator helps you check whether a planned CPU and GPU pairing is balanced for the resolution and game you actually play. Pick your parts above to see a clear verdict at 1080p, 1440p, and 4K — powered by LEVVVEL Scores for 162+ CPUs and 114+ GPUs, combined from multiple benchmarks.

How it works

  1. 1. Choose CPUSearch your processor from 162+ parts.
  2. 2. Choose GPUMatch it with 114+ graphics cards.
  3. 3. Pick settingsSet resolution, game, and graphics level.
  4. 4. Get verdictSee the limiter, gap, and upgrade advice.

Plan smarter. Build better.

Check balance before you buy — 162+ CPUs and 114+ GPUs with clear CPU vs GPU direction at every resolution.

Optimal CPU and GPU pairings

An optimal pairing is one where neither the CPU nor the GPU sits idle for the resolution and graphics settings you care about. Perfect 50/50 balance is rare — and not required. Gaps under about 15% are usually fine; mild imbalance is common and often cheaper to live with than a full upgrade.

Resolution still decides the story. Competitive 1080p leans on the CPU.1440p is the sweet spot for most gaming PCs.4K shifts load onto the GPU, so a pair that looks CPU-limited at 1080p can read as balanced — or GPU-limited — at 4K. Run your own pair through the calculator above with the game and graphics preset you actually play.

Well matched at 1440p

These popular builds stay close at 1440p on Medium graphics — the resolution most people build for.

Strong 1080p pairings

High-FPS and esports-leaning builds where the CPU keeps up at 1080p. Drop graphics toward Low if you chase frame rate.

Balanced toward 4K

Pairs that hold together when the GPU does most of the work. Raise graphics toward High or Ultra only if the calculator still looks balanced for your title.

Each link loads that CPU + GPU pair in the calculator above so you can compare 1080p, 1440p, and 4K before you buy.

Popular bottleneck tests

How we score parts

Every CPU and GPU here gets a LEVVVEL Score, built from a mix of gaming and performance tests and put on one scale: the Ryzen 7 7800X3D is 100 for processors and the RTX 5070 is 100 for graphics cards. The calculator then adjusts for your resolution, graphics preset and game, because CS2 and Valorant hit the CPU much harder than Cyberpunk 2077 or Alan Wake 2. We add new desktop parts as they launch.

How to check for a bottleneck in your own games

You can also see a bottleneck for yourself in a few minutes:

  1. Turn on a performance overlay. The one built into your graphics driver app or the Windows Game Bar (Win + G) can show GPU usage, CPU usage and FPS while you play.
  2. Play a normal busy scene for a few minutes. Menus and loading screens tell you nothing, so pick a crowded area, a big fight or a full match.
  3. Watch GPU usage. If it sits at 95 to 99%, your graphics card is doing all it can and you are GPU-limited, which is normal and usually what you want.
  4. Look for the CPU pattern. If GPU usage keeps dropping well below 90% while FPS stalls, you are most likely CPU-limited. Check single cores too: one core pinned near 100% matters more than the overall CPU percentage.
  5. Change the resolution and compare. Drop from 1440p to 1080p. If your FPS barely moves, the CPU is the ceiling. If it jumps, the GPU was the limit.

What to try before you upgrade

A lot of bottlenecks can be eased for free. Before you spend money, it is worth working through this list:

  • Match your settings to the limit. CPU-limited? Raise the resolution or graphics quality, since you are getting that for free. GPU-limited? Lower shadows, volumetrics or ray tracing first, or switch on DLSS, FSR or XeSS upscaling.
  • Check your RAM. Make sure XMP or EXPO is enabled in the BIOS, and that you are running two sticks in dual-channel mode instead of one.
  • Update drivers and the BIOS. New GPU drivers and chipset updates regularly fix stutter and add performance in recent games.
  • Close background apps. Browsers, launchers, recording software and RGB tools all compete for CPU time, which hurts most in CPU-heavy games.
  • Keep an eye on temperatures. A CPU or GPU that runs too hot will slow itself down. Clean the dust filters and check that your case fans are pulling air through properly.
  • Cap your frame rate. If you are already above your monitor's refresh rate, a frame cap smooths out frame times and takes load off the CPU.

Still stuck after all that? Then an upgrade makes sense, and the calculator above shows which part will give you the biggest jump for your resolution.

FAQ

What is a PC bottleneck?

It is when one part holds the rest of your PC back. If your graphics card could draw more frames but keeps waiting on the CPU (or the other way round), the slower part sets your FPS ceiling and you are paying for performance you never see.

How does this bottleneck calculator work?

Every CPU and GPU has a LEVVVEL Score, our own rating built from several gaming and performance tests and indexed so the Ryzen 7 7800X3D = 100 and the RTX 5070 = 100. The calculator compares the two scores, then adjusts for your resolution, graphics preset and, if you pick one, the game.

Does resolution change the bottleneck?

A lot. At 1080p the GPU finishes frames quickly, so the CPU is more likely to be the limit. At 4K the GPU does most of the heavy lifting. The same pair can look CPU-limited at 1080p and GPU-limited at 4K.

What does the bottleneck percentage mean?

It shows how far apart your CPU and GPU are at the resolution and settings you picked, and which one sets your FPS ceiling: CPU-limited, GPU-limited or balanced. The bigger the number, the more performance the stronger part is leaving on the table.

Is a small bottleneck bad?

No. Gaps under about 15% are normal and nothing to worry about. Something like 15 to 30% is common and usually not worth a full upgrade on its own. Past about 30%, the weaker part is more likely to cost you real frames at that resolution.

What makes a good CPU and GPU pairing?

One where neither part sits idle at the resolution and settings you actually play at. Build for the monitor you own: a 1080p high-refresh setup wants a relatively stronger CPU, while a 4K Ultra build wants the GPU to carry more of the budget.

Can RAM cause a bottleneck?

Yes. Too little memory, slow memory or a single stick running in single-channel mode can hold back both the CPU and the GPU, especially in CPU-heavy games. Running two sticks in dual-channel mode with XMP or EXPO switched on fixes most of it.

Should I upgrade my CPU or GPU first?

Upgrade whichever part the calculator (and your own in-game check) says is the limit at the resolution you play. For most people gaming at 1440p or 4K that is the GPU. If you play competitive games at 1080p and chase high frame rates, a faster CPU usually helps more.

Setting up the rest of your rig? Try the eDPI calculator or the sensitivity converter, or browse all our gaming tools.