Microsoft Flight Simulator

Microsoft Flight Simulator presents an unusually demanding workload that stresses both the CPU and GPU in sequence, and the measured results for the Intel Core i5-12400 paired with the NVIDIA GeForce RTX 3080 show a clear picture of where the bottleneck shifts as resolution changes. The data set covers four settings presets (Low, Medium, High, Ultra) across three resolutions, and the patterns in those twelve data points reveal a system that is decisively GPU-limited at 4K but becomes increasingly CPU-bound as resolution drops.

Resolution Scaling

The FPS drop from 1080p to 4K is steep and consistent across all settings, but the magnitude of that drop tells the story of which component is doing the heavy lifting. At Low settings, the average frame rate falls from 157.2 FPS at 1920x1080 to 126.4 FPS at 2560x1440, then to 89.6 FPS at 3840x2160. That is a 43% reduction from 1080p to 4K, which is substantial but not catastrophic — the RTX 3080 is clearly still delivering playable numbers even at the lowest preset and highest resolution.

Switching to Medium settings, the scaling changes character. The 1080p result is 122.7 FPS, dropping to 101.2 FPS at 1440p and 68.4 FPS at 4K. The step from 1440p to 4K now costs 32.4 FPS, which is a larger absolute drop than the 21.5 FPS loss seen between 1080p and 1440p. This suggests that at Medium, the GPU is beginning to work harder per pixel, and the gap between resolutions widens as the render load increases.

At High settings, the pattern becomes more pronounced. The 1080p average is 94.4 FPS, the 1440p average is 75.6 FPS, and the 4K average is 57 FPS. The drop from 1440p to 4K is 18.6 FPS, while the drop from 1080p to 1440p is 18.8 FPS — nearly identical. This near-linear scaling indicates that the system is transitioning into a state where the GPU is the primary limiter at all three resolutions, and the CPU has enough headroom to feed it consistently.

Ultra settings show the most dramatic scaling. The 1080p result is 87.1 FPS, which falls to 73.1 FPS at 1440p and then to 49.1 FPS at 4K. The 4K Ultra result is barely half of the 1080p Low result, and the 24 FPS difference between 1440p and 4K is the largest single-step drop in the entire data set. This is the clearest evidence that Ultra settings at 4K push the RTX 3080 to its absolute limit, with the GPU rendering every extra pixel at maximum fidelity.

The limiting component is unambiguous. At 1080p Low, the system produces 157.2 FPS, which is far beyond what the RTX 3080 can sustain when pixel count increases. The fact that 1080p Ultra (87.1 FPS) is actually lower than 4K Low (89.6 FPS) confirms that the GPU workload scales more with settings than with resolution alone. The CPU is never the primary constraint in this pairing — the data shows the RTX 3080 is the component that determines the ceiling.

CPU Role

The Intel Core i5-12400 is a 6-core, 12-thread processor with a base clock of 2.50 GHz and a boost clock of 4.40 GHz, built on the Alder Lake architecture with a 10 nm process. Its benchmark scores place it in the 77th percentile among all CPUs, with an average benchmark score of 19850. The nearest rivals are the Intel Core i7-9700 (score 19831, deltaPct 0.1), the Intel Core i7-8700 (score 19894, deltaPct -0.2), and the AMD Ryzen Threadripper PRO 5995WX (score 19928, deltaPct -0.4). The i5-12400 is statistically tied with these parts, sitting within a fraction of a percent of each.

In Microsoft Flight Simulator, the CPU's role is to handle the simulation logic, physics, and draw-call preparation before the GPU renders the frame. The measured FPS data shows that this CPU is not the limiting factor in most scenarios. At 1080p Low, the system hits 157.2 FPS, which is high enough that the GPU is still the bottleneck even at the lowest resolution and settings. If the CPU were holding the system back, we would expect to see the 1080p Low result cap at a lower value, regardless of what the GPU could theoretically produce.

The single-thread performance is relevant here. The 3DMark single-thread score is 910, and the Cinebench R23 single-core score is 2249. These are strong numbers for a 6-core part, and they explain why the CPU can keep up with the RTX 3080's demands at lower resolutions. The multi-thread scores — 5890 in 3DMark max threads and 15935 in Cinebench R23 multicore — show that the 12 threads provide ample parallel processing for the simulator's background tasks.

The data suggests that the i5-12400 is sufficient for this GPU at every resolution tested. The FPS differences between settings presets are driven by GPU workload, not CPU limitations. Even at 1080p Ultra, where the CPU has to prepare more draw calls for the higher-detail geometry, the system still achieves 87.1 FPS, which is well above the threshold where CPU bottlenecks typically appear. The conclusion is that this CPU provides a solid foundation for the RTX 3080, with no evidence of the processor throttling performance in any of the twelve measured configurations.

FAQ

Q: Does the Intel Core i5-12400 bottleneck the RTX 3080 in Microsoft Flight Simulator?

A: The data shows no evidence of a CPU bottleneck. At 1080p Low, the system produces 157.2 FPS, and at 1080p Ultra it still reaches 87.1 FPS. The FPS scaling between resolutions and settings is consistent with GPU limitation, not CPU limitation.

Q: What is the best resolution for this combo to maintain 60+ FPS?

A: At 4K, only Low settings (89.6 FPS) and Medium settings (68.4 FPS) exceed 60 FPS. At 1440p, all four presets exceed 60 FPS, with the lowest being Ultra at 73.1 FPS. At 1080p, every preset is above 87 FPS.

Q: How does the i5-12400 compare to its nearest CPU rivals in overall benchmark performance?

A: The i5-12400's average benchmark score is 19850. The Intel Core i7-9700 scores 19831 (0.1% faster), the Intel Core i7-8700 scores 19894 (0.2% slower), and the AMD Ryzen Threadripper PRO 5995WX scores 19928 (0.4% slower). The differences are negligible.

Q: Is the RTX 3080's performance in this game consistent with its overall GPU ranking?

A: The RTX 3080 has an average benchmark score of 35787 and sits in the 80th percentile among all GPUs. Its nearest rivals include the AMD Radeon Pro Duo (35860, 0.2% faster) and the AMD Radeon RX 7900 GRE (36101, 0.9% faster), showing the card is competitive.

Q: What settings preset at 4K provides the smoothest experience?

A: Low settings at 4K deliver 89.6 FPS, which is the highest average FPS at that resolution. Medium settings are also viable at 68.4 FPS, but High (57 FPS) and Ultra (49.1 FPS) drop below the 60 FPS threshold.

Q: How many frames per second does the system lose going from 1440p to 4K at High settings?

A: At High settings, the 1440p average is 75.6 FPS and the 4K average is 57 FPS, representing a loss of 18.6 FPS. This is nearly identical to the 18.8 FPS loss from 1080p to 1440p, indicating linear GPU scaling at this preset.

Settings Recommendations

The measured data provides a clear hierarchy for selecting a settings preset based on the desired frame rate and resolution. At 4K, the choice is constrained by the GPU's limits. Low settings produce 89.6 FPS, which is the only preset that offers a comfortable margin above 60 FPS. Medium settings at 68.4 FPS are still playable, but High (57 FPS) and Ultra (49.1 FPS) fall below the 60 FPS threshold, making them less ideal for smooth gameplay.

At 1440p, the situation is more favorable. All four presets exceed 60 FPS, with Low at 126.4 FPS, Medium at 101.2 FPS, High at 75.6 FPS, and Ultra at 73.1 FPS. The difference between High and Ultra is only 2.5 FPS, which suggests that players can enable Ultra settings at 1440p without sacrificing much frame rate. This makes 1440p Ultra the best balance of visual fidelity and performance, as the 73.1 FPS average is still well above the 60 FPS playability threshold.

At 1080p, the system has ample headroom. Low settings hit 157.2 FPS, Medium reaches 122.7 FPS, High achieves 94.4 FPS, and Ultra manages 87.1 FPS. Even the lowest result at 1080p is above 85 FPS, so players can freely choose the Ultra preset for maximum visual quality without worrying about frame rate drops. The recommendation is to prioritize Ultra at 1080p, as the 87.1 FPS average provides a smooth experience with all details maxed out.

The best overall experience per the measured rows is 1440p Ultra. It delivers 73.1 FPS, which is above 60 FPS, and it offers the highest visual fidelity available in the data set that still maintains smooth performance. At 4K, the recommendation is Medium settings (68.4 FPS) if visual quality is the priority, or Low settings (89.6 FPS) if frame rate is paramount. High and Ultra at 4K are not recommended due to their sub-60 FPS averages.

How This Combo Ranks

The combination of the Intel Core i5-12400 and the NVIDIA GeForce RTX 3080 ranks 534th out of 1795 tested combos in Microsoft Flight Simulator. This places it in the upper-middle tier of all configurations, with roughly 70% of tested combos performing worse and 30% performing better. Given that the RTX 3080 is in the 80th percentile of all GPUs and the i5-12400 is in the 77th percentile of all CPUs, the combo ranking is slightly lower than either component's individual percentile, which is expected for a demanding simulation title.

The ranking reflects the game's unique performance profile. Microsoft Flight Simulator is known for being heavily CPU-dependent at lower resolutions, and the i5-12400's 6-core, 12-thread configuration is capable but not exceptional. The combo's rank of 534 out of 1795 suggests that higher-end CPUs with more cores and faster single-thread performance would achieve better results, particularly at 1080p where the data shows the GPU is not fully utilized.

However, the rank should be interpreted in context. The data shows that this combo delivers playable frame rates at all three resolutions across most settings, with only 4K High and 4K Ultra falling below 60 FPS. The 534th rank does not indicate poor performance — it simply means that many other tested combos, likely featuring more powerful CPUs or GPUs, achieve higher average FPS. For the i5-12400 and RTX 3080, the rank is a reasonable outcome given that both components are mid-to-high-end parts from their respective generations.

Measured FPS Breakdown

At 1920x1080, the measured average FPS values are as follows: Low settings produce 157.2 FPS, Medium settings produce 122.7 FPS, High settings produce 94.4 FPS, and Ultra settings produce 87.1 FPS. The difference between Low and Ultra is 70.1 FPS, which represents a 45% reduction in frame rate when moving from the lowest to the highest preset. The step from High to Ultra is the smallest, at 7.3 FPS, indicating that the Ultra preset adds relatively little GPU load compared to High.

At 2560x1440, the average FPS values are: Low at 126.4 FPS, Medium at 101.2 FPS, High at 75.6 FPS, and Ultra at 73.1 FPS. The gap between Low and Ultra is 53.3 FPS, which is a 42% reduction. The step from Medium to High is 25.6 FPS, which is the largest single-step drop in this resolution, suggesting that the High preset introduces a significant increase in rendering complexity. The step from High to Ultra is only 2.5 FPS, making Ultra a nearly free upgrade at 1440p.

At 3840x2160, the average FPS values are: Low at 89.6 FPS, Medium at 68.4 FPS, High at 57 FPS, and Ultra at 49.1 FPS. The difference between Low and Ultra is 40.5 FPS, a 45% reduction. The step from Medium to High is 11.4 FPS, and the step from High to Ultra is 7.9 FPS. Notably, the 4K Low result (89.6 FPS) is higher than the 1080p Ultra result (87.1 FPS), which underscores how much more impactful settings are than resolution for this GPU.

The data shows that the RTX 3080 maintains a consistent performance hierarchy across all resolutions: Low is always the fastest, followed by Medium, then High, then Ultra. The relative gaps between presets are similar at 1080p and 4K (both around 45% between Low and Ultra), while 1440p shows a slightly smaller gap at 42%. This consistency indicates that the GPU's performance scaling is predictable, and the i5-12400 does not introduce any anomalies that would disrupt the expected pattern.