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A smooth frame-time graph can still look stuttery because many graphs show when frames are rendered or present calls are submitted, while your eyes see when completed frames actually reach the display. Filtering, missed presentation opportunities, repeated frames, queue delays, compositor behavior and variable-refresh-rate (VRR) limits can all make displayed intervals uneven. The fix is to measure both rendered and displayed timing before changing hardware or settings.
What does a smooth frame-time graph actually measure?
It depends on the tool and the graph you are viewing. A capture may measure game or GPU submission timing, average several samples into a trendline, or show a filtered view rather than every individual interval. Those measurements are useful, but none automatically proves that the monitor presented each frame at an even cadence.
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That is why a flat-looking rendered-time line can coexist with visible hitching. A frame may be rendered on schedule but wait in a queue, miss a scanout opportunity, or remain on screen for an extra refresh interval. The graph can look healthy at the submission point while the display-side intervals are not.
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Why do averages hide visible stutter?
Average FPS and smoothed frame-time lines compress a distribution into one easy-to-read trend. A few long intervals can be visually insignificant on a filtered graph yet obvious during a camera pan or fast movement. CapFrameX documents separate raw frametime views, time-based average filters, percentile metrics and outlier controls in its analysis documentation.
Consider a nominal 60 FPS target. The reciprocal relationship between rate and duration gives approximately 16.7 milliseconds per frame (1,000 ÷ 60). If intervals alternate between shorter and longer values but average near 16.7 ms, the measured rate can still look correct while motion cadence feels uneven. The eye reacts to the spacing between successive displayed frames, not just the arithmetic mean.
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What is the difference between rendered timing and displayed timing?
Rendered timing describes work earlier in the graphics pipeline. Displayed timing describes when the presentation actually changes on the panel. The two can diverge after the game has finished rendering.
| Measurement | What it tells you | What it cannot prove by itself |
|---|---|---|
| Game or CPU frame time | How long simulation, game-thread work and submission took | That the frame reached the display on time |
| GPU/render time | How long the GPU spent producing a frame | That scanout or synchronization was smooth |
| Present-to-present or MsBetweenPresents | How regularly frames were submitted or delivered into the rendering path | That each frame was displayed for an equal duration |
| Display-change timing or MsBetweenDisplayChange | How regularly the visible image changed at the end of the pipeline | Which earlier stage caused a delay without correlated CPU/GPU data |
When the display-change trace contains long intervals that do not appear in rendered timing, investigate queues, synchronization, scan position, compositing and the monitor’s operating range rather than immediately replacing the GPU.
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Which parts of the pipeline can introduce judder?
Frame pacing is a chain. A regular result at one stage can be disrupted by a later stage, and a slow stage can be masked by buffering until a deadline is missed. Microsoft’s frame-pacing sample models these stages and their timing relationships.
CPU update and submission
The CPU advances simulation, prepares draw calls and submits work through the driver. Game-thread spikes, shader compilation initiated by the engine, background tasks, operating-system scheduling or a synchronization wait can delay submission. If long displayed intervals line up with CPU-time spikes, lower CPU-side workload, close competing tasks and investigate the game’s simulation or streaming settings before changing the monitor.
GPU rendering
Shader, geometry, memory-bandwidth and thermal workloads can lengthen render time. A GPU-limited frame may miss its intended presentation point even if the CPU is ready. Correlate GPU duration and utilization with the long frames; a graphics-card upgrade is rational only when this evidence shows sustained GPU-side limitation or spikes that settings cannot address.
Swap-chain buffers and frame-latency waits
Completed frames pass through swap-chain buffers and queue-control rules. Buffer depth can absorb a short burst, but it can also add latency or cause a frame to wait for an available slot. The order in which the CPU, GPU and presentation system reach their deadlines matters more than any single FPS number.
Presentation and scanout
A frame that finishes after the relevant presentation deadline may wait for the next opportunity. Scan position also matters: two frames with similar render times can have different visible timing if they arrive at different points in a refresh scan. That can produce a hitch without a dramatic change in average FPS.
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Display synchronization
VRR systems such as FreeSync, G-SYNC Compatible and VESA Adaptive-Sync adjust refresh timing to the GPU’s output, but only within the panel’s supported VRR window. AMD’s FreeSync overview describes synchronization between display refresh and GPU frame rate, while AMD GPUOpen’s frame-pacing and VRR documentation explains the limits: outside the window, a previous frame may be shown again or tearing may occur.
How can you diagnose stutter that the graph misses?
You need a repeatable capture that includes both sides of the pipeline. A single average FPS overlay is not enough.
- Capture rendered and displayed timing. Use FrameView’s rendered and displayed timing fields, or a PresentMon-based analyzer such as CapFrameX. Save the raw capture rather than only a screenshot of a smoothed line.
- Inspect the distribution. Compare average, median, 95th- and 99th-percentile values, worst-frame duration and marked outliers. A smooth filtered trendline should be treated as a summary, not proof of uniform cadence.
- Overlay CPU and GPU information. CapFrameX supports CPU/GPU sensor overlays, and Microsoft’s sample provides a model for separating CPU and GPU stages. Determine whether each long displayed interval coincides with CPU work, GPU work or neither.
- Check the display-side trace. If MsBetweenPresents is regular but MsBetweenDisplayChange is not, focus on queueing, presentation, compositor mode, scan timing and VRR behavior.
- Change one presentation variable at a time. Test VRR enabled versus disabled, VSync modes, a frame-rate cap, fullscreen versus borderless mode and frame generation separately. Record the same metrics after each change.
- Repeat an identical workload. Use the same save point, camera route and capture duration. Scene complexity, streaming and shader-cache activity can otherwise make one run incomparable with another.
Do not infer causality from a single coincidental spike. A setting that changes the graph may also change the scene, queue depth or frame rate, so confirm the result with repeated captures.
How do VRR limits create stutter even when VRR is enabled?
VRR is not an unlimited guarantee of smoothness. Every display has a minimum and maximum refresh rate. If frame production falls below the lower bound or rises above the upper bound, the display must use a fallback behavior. Depending on the implementation, it may repeat a frame, switch synchronization behavior or allow tearing.
AMD GPUOpen states that the goal of frame pacing is to display each frame for an equal amount of time. That goal is hardest to maintain at the edges of the VRR window, where a small timing change can move the system between variable refresh and a fallback mode. A frame-rate cap set inside the monitor’s verified VRR range can avoid repeatedly hitting that boundary, but the correct cap depends on the panel and the game’s actual output.
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Check the monitor’s published VRR range, connection type, current firmware and graphics-driver support. Regional listings and firmware can change, so verify the specification for the exact model rather than assuming that a product name guarantees a particular range. Also check whether the game is running in a mode where the driver and operating system can apply VRR correctly.
Should you buy a VRR gaming monitor or a faster graphics card?
Buy or prioritize a VRR gaming monitor when displayed timing is uneven but CPU and GPU render times are already within the target budget. FreeSync, G-SYNC Compatible or VESA Adaptive-Sync can reduce cadence mismatch between the GPU and panel, provided the game remains inside the monitor’s VRR window. VRR cannot repair a game-thread stall, a shader hitch or a queue problem by itself.
Consider a graphics card upgrade only when telemetry shows GPU render-time saturation or repeatable GPU spikes. A faster GPU can shorten rendering, but it will not necessarily change CPU scheduling, swap-chain waits, compositor timing or the monitor’s scan behavior. FrameView and Microsoft’s sample both distinguish rendering work from later display timing, so the purchase should follow the evidence.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches| Evidence from capture | Most appropriate next step | Why |
|---|---|---|
| GPU time dominates and rises with quality settings | Reduce GPU-heavy settings or consider a faster graphics card | The rendering stage is the demonstrated bottleneck |
| CPU time spikes while GPU time remains available | Investigate game-thread work, background tasks, streaming and scheduling | A GPU upgrade may leave the limiting stage unchanged |
| Rendered timing is smooth; displayed timing has repeats or long gaps | Check VRR range, VSync, frame cap, queue and display mode | The problem occurs after rendering |
| Problems appear only near the VRR minimum or maximum | Cap below the upper limit and avoid excursions below the lower limit where practical | VRR behavior changes at its operating boundaries |
Which settings should you change first?
Start with reversible presentation changes and measure after each one.
- Confirm the monitor connection and VRR status. Make sure the selected display input, driver control panel and operating-system display settings all agree on the intended refresh mode.
- Establish a frame-rate cap. Set a cap that keeps output inside the monitor’s documented VRR window. Compare displayed-time percentiles, not only the cap’s nominal FPS.
- Compare VSync configurations. Test the game’s VSync option and the driver-level behavior separately. Note latency, tearing and display-change timing for each configuration.
- Compare fullscreen and borderless modes. Compositor involvement can differ between modes. Keep the scene and cap unchanged while switching.
- Test frame generation separately. Generated frames alter presentation cadence and queue behavior. Measure base-rendered timing and displayed timing rather than judging only the higher reported FPS.
- Adjust workload settings only after identifying the stage. Lower GPU-heavy options for GPU spikes; reduce simulation, crowd or background activity for CPU spikes. Do not trade image quality blindly when the display side is the actual issue.
Record latency and image-quality trade-offs alongside smoothness. A mode that removes visible judder but adds unacceptable input delay or tearing may not be the right final configuration.
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What common troubleshooting mistakes make the diagnosis worse?
- Relying on average FPS alone: averages hide tails, repeats and missed presentation intervals.
- Reading only a filtered graph: down-sampling and time-based smoothing can erase short events. Always inspect raw frametimes and percentiles.
- Assuming a GPU bottleneck: a regular rendered trace with irregular displayed timing points elsewhere in the pipeline.
- Changing several settings at once: you cannot identify which variable affected pacing, latency or tearing.
- Ignoring VRR boundaries: enabling VRR does not remove its minimum and maximum operating limits.
- Comparing different scenes: a new camera path or streaming event can create a false improvement or regression.
- Treating a repeated frame as a render failure: a frame may have rendered on time but been displayed for an extra interval because the next presentation missed its opportunity.
What should a good frame-pacing report include?
For a useful diagnosis, preserve the capture duration, game version, display refresh setting, VRR state, VSync state, frame cap, display mode and graphics-driver version. Include raw and filtered graphs, rendered and displayed timing, CPU/GPU metrics, percentile values and the exact scene or route used.
That record lets you distinguish a repeatable pipeline issue from a one-off interruption. It also prevents a misleading conclusion such as “the graph is smooth, so the game is smooth” when the graph represents only one stage.
What is the bottom line?
Visible smoothness is determined by the cadence of frames reaching the display, not by a single averaged render-time line. Measure rendered timing and displayed timing together, inspect percentile tails and outliers, then isolate CPU, GPU, queue, presentation and VRR behavior one variable at a time. A VRR gaming monitor is the most direct hardware match for a display-cadence problem; a graphics-card upgrade makes sense only when telemetry proves the GPU is the limiting stage.
Frequently Asked Questions
Can a game feel stuttery at a locked 60 FPS?
Yes. A 60 FPS average corresponds to about 16.7 ms per frame, but alternating short and long displayed intervals can feel uneven while the average remains locked. Check raw displayed-time intervals and upper-percentile values instead of the lock alone.
Does lowering graphics quality always fix microstutter?
No. Lowering GPU-heavy settings helps only when GPU render time is the source of the spikes. CPU scheduling, shader compilation, queue waits, compositor behavior and VRR-boundary transitions can remain unchanged.
Is borderless fullscreen worse for frame pacing?
Not universally. Borderless mode can involve a compositor path that differs from exclusive fullscreen, but the result depends on the operating system, driver and game. Compare both modes with identical scenes and displayed-time captures.
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Why does a frame-rate cap sometimes feel smoother than uncapped output?
A cap can keep frame production inside the monitor’s VRR window and reduce repeated excursions across synchronization boundaries. Its benefit depends on the cap’s relationship to the panel’s actual VRR range and the game’s pacing consistency.
What should I save when reporting a stutter problem?
Save the raw capture, rendered and displayed timing graphs, percentile and worst-frame data, CPU/GPU overlays, VRR and VSync states, frame cap, display mode, refresh rate and the repeatable scene used. Those details show whether the disruption occurs before or after rendering.
