Find the Right Guide for Your CPU, GPU, Resolution, or Performance Problem
Use this hub to move from a calculator estimate to a useful decision. Start with the question you are actually trying to answer, then open the guide that matches your hardware, resolution, target frame rate, symptoms, or upgrade situation.
BottleneckLab does not treat one percentage as proof. A calculator result is a planning signal. Real frame time, per-core CPU activity, GPU usage, memory pressure, temperatures, clocks, caps, and repeatable gameplay provide the stronger evidence. The IPPT Calculator can be useful for getting a quick estimate of your performance and understanding where you currently stand. Use it as a starting point for planning, then compare the result with actual test performance and consistent training progress.
Estimate, Interpret, Verify, Then Decide
Each step has a different job. Skipping directly from a percentage to a purchase is the fastest way to misdiagnose a PC.
Run your exact build
Select the precise desktop CPU, GPU and VRAM variant, resolution, target FPS, workload, and relevant optional context.
Open the calculatorRead the direction and reasons
Focus on likely CPU-side or GPU-side pressure, confidence, warnings, and the first free check. Treat the percentage as secondary.
Understand the resultCheck the actual computer
Repeat the same scene and compare frame time, per-core CPU activity, GPU usage, VRAM, RAM, temperatures, clocks, power, and caps.
Use the 53-point checklistKeep, fix, or upgrade
Keep the build when it meets the real target. Try configuration fixes first. Upgrade only when repeated evidence confirms a meaningful unmet need.
Open the troubleshooting hubUnderstand What the Estimate Can and Cannot Tell You
These resources explain the model, its limitations, and how to avoid treating a directional estimate as measured performance.
How Does a Bottleneck Calculator Work?
Learn how component references, resolution, target FPS, workload, and optional context influence the result. See why the output is not a live benchmark or hardware scan.
- calculator inputs and model logic;
- CPU-side and GPU-side direction;
- confidence, warnings, and uncertainty;
- why real-system evidence takes priority.
Are Bottleneck Calculators Accurate?
Use this guide to understand when an estimate is useful, why different calculators disagree, and which real-world variables can change the apparent result.
- directional usefulness versus measured accuracy;
- game, scene, patch, settings, and driver differences;
- false certainty and misleading percentages;
- when to trust monitoring over the model.
53-Point Bottleneck Verification Checklist
Record a repeatable test instead of guessing. The interactive checklist helps separate CPU, GPU, memory, thermal, power, cap, storage, and software-related causes.
- repeatable-scene testing;
- frame time and 1% lows;
- per-core CPU and GPU behavior;
- VRAM, RAM, thermals, clocks, and caps.
Resolution, Refresh Rate, and Streaming Guides
Resolution changes rendering demand, but it does not guarantee which component will limit every game. Target FPS, engine behavior, settings, upscaling, ray tracing, and scene complexity still matter.
1080p Bottleneck Guide
Learn why low rendering load can expose CPU-side or game-engine limits, especially when the target is 144Hz, 240Hz, or higher.
- high-refresh gaming;
- low GPU usage diagnosis;
- frame-time and per-core checks.
1440p Bottleneck Guide
Evaluate a common gaming target where stronger GPU load can reduce some CPU pressure, while high FPS and CPU-heavy games can still expose processor limits.
- 60 to high-refresh targets;
- GPU class and CPU headroom;
- when an upgrade changes little.
4K Bottleneck Guide
Understand why 4K often increases GPU load without assuming the CPU never matters. Review upscaling, ray tracing, VRAM, frame generation, and target FPS.
- native versus upscaled rendering;
- VRAM and visual-quality tradeoffs;
- CPU relevance at lower internal resolution.
Gaming and Streaming Bottleneck Guide
Diagnose a single-PC gaming and streaming workload using OBS render lag, encoding lag, GPU headroom, per-core CPU pressure, encoder choice, and network dropped frames.
- CPU versus hardware encoding;
- render lag versus network loss;
- gaming and recording together.
CPU and GPU Pairing and Upgrade Guides
Pairing advice should account for what you already own, platform cost, resolution, target FPS, game type, cooling, memory, power, and whether the current build already meets the goal.
Not sure which component deserves the budget? Use the 10-minute CPU or GPU upgrade decision test before choosing a processor or graphics-card guide.
I already chose a graphics card
Compare CPU options by budget, platform, resolution, refresh target, and upgrade cost. Avoid buying the fastest processor when a cheaper chip already meets the real goal.
I already own the processor
Choose a GPU that fits the display target and the processor’s practical frame-delivery range. Existing ownership often makes a different answer sensible than a new build.
I need one pairing decision
Exact-pair guides answer whether a current combination is worth keeping, where it can become limited, which free checks matter, and when an upgrade is justified.
Ask these four questions first
- 1
Does the current system miss a frame-rate, smoothness, visual-quality, or workload target that matters?
- 2
Does the same limiting pattern appear in repeated tests rather than one random moment?
- 3
Have caps, memory, temperatures, drivers, background tasks, power, and settings been checked?
- 4
Does the complete upgrade cost produce enough real improvement to justify replacing the platform or component?
Diagnose and Fix a Suspected Bottleneck
Symptoms such as low GPU usage, high total CPU usage, stutter, weak 1% lows, or FPS drops do not identify one cause by themselves. Start with the pattern that most closely matches the real problem.
Important CPU cores stay busy
GPU usage remains lower, reducing graphics load changes little, and frame time worsens in CPU-heavy scenes.
Diagnose CPU-side pressure → GPUThe GPU remains heavily used
Performance improves after reducing resolution, ray tracing, graphics settings, or another rendering-heavy option.
Diagnose GPU-side pressure → LOWGPU usage is unexpectedly low
Check caps, per-core CPU activity, wrong-GPU selection, engine limits, temperature, power, memory, background tasks, and drivers before blaming the processor.
Investigate low GPU usage → SYSThe cause may not be CPU or GPU speed
Rule out RAM configuration, VRAM pressure, thermals, power modes, storage, updates, unstable settings, and active FPS caps.
Check common false bottlenecks →Popular BottleneckLab Hardware Decisions
These pages answer common build and upgrade questions. Use them as decision frameworks, not universal promises for every game or system.
Best CPU for RTX 4070
Budget, AM4, high-refresh, AM5, platform-cost, choose, and skip paths.
Existing CPUBest GPU for Ryzen 5 5600
Practical GPU levels for 1080p, 1440p, current ownership, and AM4 upgrades.
Exact pairingi5-12400F with RTX 4070
RTX 4070 versus Super, 1080p versus 1440p, target FPS, and keep-or-upgrade logic.
Exact pairingRyzen 5 5600 with RTX 4070
High-refresh CPU pressure, 1440p use, AM4 platform cost, and free checks.
Current generationBest CPU for RTX 5060 Ti
8GB versus 16GB context, budget fit, platform choice, and existing-CPU guidance.
Current generationBest CPU for RTX 5070 and 5070 Ti
Separate GPU paths, resolution, high-FPS demand, compatibility, and total build cost.
Four Evidence Layers Stay Separate
A product specification, an external benchmark, a BottleneckLab model estimate, and a test performed on the actual computer are not interchangeable forms of proof.
Model, generation, socket, memory support, VRAM, connectors, and factual product attributes.
Performance evidence interpreted with its disclosed hardware, software, scene, settings, and limits.
Directional planning signals based on selected components and context, not measured FPS loss.
Repeatable evidence from the actual PC takes priority when it conflicts with a general estimate.
Run the Calculator, Then Verify the Result Before Spending Money
The useful outcome is not a dramatic percentage. It is knowing whether the current build meets the real target, which free check comes next, and whether an upgrade is actually justified.