Microsoft Flight Simulator

# Microsoft Flight Simulator — Intel Core i5-14400F + NVIDIA GeForce RTX 5090

This combination produces a heavily GPU-bound experience at higher resolutions, with the RTX 5090 delivering exceptional frame rates that remain playable even at 4K Ultra. The data shows a clear pattern: at 1080p, the CPU begins to limit performance, while at 4K, the GPU is the dominant constraint. The combo ranks 110th out of 3714 tested configurations, placing it in the top 3% of all tested systems for this title.

Resolution Scaling

The measured FPS data reveals a predictable but important scaling pattern across the three tested resolutions. Moving from 1080p to 1440p at High settings, the average frame rate drops from 139 FPS to 112 FPS, a reduction of approximately 19%. The subsequent step from 1440p to 4K at High settings sees a further decline from 112 FPS to 83 FPS, another 26% reduction. This consistent degradation indicates that the RTX 5090's massive compute resources are being progressively taxed as pixel count increases.

At Low settings, the scaling behavior is more dramatic. The 1080p Low result of 196 FPS falls to 182 FPS at 1440p (a 7% drop), then plunges to 142 FPS at 4K (a 22% drop from 1440p). The relatively small penalty from 1080p to 1440p at Low settings suggests that at lower graphical loads, the Intel Core i5-14400F's 10 cores and 16 threads are becoming a limiting factor. The larger 4K penalty reflects the GPU resuming its role as the primary bottleneck.

Medium settings show the most linear scaling: 179 FPS at 1080p, 149 FPS at 1440p, and 110 FPS at 4K. These represent drops of 17% and 26% respectively. Ultra settings follow a similar trajectory with 133 FPS at 1080p, 107 FPS at 1440p, and 79 FPS at 4K — reductions of 20% and 26%. The consistent 26% penalty between 1440p and 4K across Medium, High, and Ultra settings strongly indicates that the RTX 5090's rendering pipeline is the limiting component in this resolution range.

The 1080p-to-1440p scaling tells a different story. At Low settings the penalty is only 7%, while at Ultra it is 20%. This widening gap suggests that as settings increase, the GPU workload grows enough to re-establish the GPU as the primary bottleneck even at 1440p. At Low settings, however, the CPU's performance ceiling is reached, preventing the GPU from fully stretching its legs.

Settings Recommendations

The benchmark data provides clear guidance for optimal settings at each resolution. At 4K, the Medium preset delivers 110 FPS average with a minimum of 94 FPS and maximum of 127 FPS. This represents the best balance of visual fidelity and performance, as High settings only offer 83 FPS and Ultra drops to 79 FPS — both still playable but with less headroom for complex flight scenarios. The 4K Medium result is 39% faster than 4K Ultra while providing substantially better visuals than Low.

At 1440p, the High preset at 112 FPS is the recommended choice. It offers a 5% improvement over Ultra's 107 FPS while delivering noticeably better image quality than Medium's 149 FPS. The 1440p Medium preset's minimum of 127 FPS provides excellent frame pacing, but High's average remains comfortably above 60 FPS for demanding simulator workloads.

For 1080p users, the High preset at 139 FPS is optimal. The jump to Medium (179 FPS) provides diminishing returns in smoothness since High already exceeds the refresh rate of most displays. The Ultra preset at 133 FPS is viable for those prioritizing maximum visual quality, but the 4% penalty versus High is not justified given the minimal visual difference in flight simulation contexts.

The data indicates that Medium settings at 4K provide the single best experience overall. The 94 FPS minimum ensures that even dense urban areas or complex weather scenarios remain fluid. For users with high-refresh-rate displays at 1440p, Medium's 149 FPS with a 127 FPS minimum offers the smoothest experience, while High at 112 FPS remains the best quality-per-frame option.

FAQ

Q: Is the RTX 5090 overkill for this CPU in Microsoft Flight Simulator?

A: At 1080p Low, the combination reaches 196 FPS, but the modest 7% drop to 182 FPS at 1440p Low suggests CPU limitation. At 4K, the GPU is clearly the bottleneck across all settings, with the 5090's advantages becoming fully apparent.

Q: What frame rate can I expect at 4K Ultra settings?

A: The measured average is 79 FPS at 3840x2160 Ultra. This is above the 60 FPS threshold for smooth simulation, though the lack of a recorded minimum means worst-case scenarios in dense areas could dip lower.

Q: How does the 14400F's 10-core configuration affect performance?

A: The CPU has 10 cores and 16 threads with a 2.50 GHz base clock and 4.70 GHz boost clock. Its 20 MB shared L3 cache and 1.25 MB per-core L2 cache provide adequate bandwidth for flight simulation's single-thread-heavy workloads, but at 1080p Low the CPU becomes the limiting factor.

Q: Is there a big difference between Medium and High settings at 4K?

A: Yes, the difference is 27 FPS (110 vs 83), representing a 33% advantage for Medium. The Medium preset also records a 94 FPS minimum, while High has no minimum recorded, suggesting less consistent frame delivery.

Q: Should I use Low settings for maximum frame rate?

A: Low settings at 1080p yield 196 FPS, which is the highest measured result in the dataset. However, at 4K Low produces 142 FPS — only 29% higher than Medium despite the significant visual quality reduction.

Q: How does this combo rank among all tested configurations?

A: It ranks 110th out of 3714 tested combos, placing it in the top 3% of all systems tested for this game. This reflects the RTX 5090's exceptional performance despite the mid-range CPU pairing.

How This Combo Ranks

With a rank of 110 out of 3714 tested combinations, this system sits in the 97th percentile of all configurations benchmarked for Microsoft Flight Simulator. This placement is remarkable given that the Intel Core i5-14400F is a mid-range processor that ranks in the 83rd percentile among all CPUs tested across all workloads. The RTX 5090, by contrast, ranks in the 92nd percentile among all GPUs.

The combination's high ranking is primarily attributable to the GPU's dominance in this title. The RTX 5090's 32 GB of GDDR7 memory on a 512-bit bus with 1.79 TB/s bandwidth provides massive headroom for the high-resolution textures and streaming data characteristic of flight simulation. The 104.8 TFLOPS FP32 compute and 1,636.8 GTexel/s texture rate ensure that even the most detailed scenery renders without GPU-side bottlenecks.

The CPU's contribution to the ranking is more modest. The 14400F's 20 MB of L3 cache and 4.70 GHz boost clock provide adequate single-thread performance for the game's core simulation logic. However, as the resolution scaling analysis shows, the CPU becomes the limiting factor at lower resolutions and settings, capping performance below what the GPU alone could achieve.

In the context of the 3,713 other tested combos, this system's 110th-place finish means it outperforms the vast majority of configurations, including many with more powerful CPUs paired with lesser GPUs. This underscores the importance of GPU selection for flight simulation at higher resolutions.

CPU Role

The Intel Core i5-14400F brings 10 cores and 16 threads to this pairing, utilizing Intel's Raptor Lake architecture on a 10 nm process. Its 2.50 GHz base clock and 4.70 GHz boost clock provide a wide operating range, while the 65 W TDP indicates efficient power delivery for sustained simulation sessions. The 20 MB shared L3 cache and 1.25 MB per-core L2 cache help reduce memory latency for the game's physics and flight model calculations.

In synthetic benchmarks, the CPU achieves a Cinebench R23 multicore score of 21,645 and a single-core score of 3,055. The Geekbench multicore result of 11,268 and single-core score of 2,058 further characterize its capabilities. These scores place the CPU in the 83rd percentile among all processors, with its nearest rivals including the AMD Ryzen 7 PRO 8840U (0.1% ahead), Intel Core i9-11900 (0.2% ahead), and AMD Ryzen 7 6800HS (0.2% behind).

For Microsoft Flight Simulator specifically, the data suggests that the CPU's role is secondary to the GPU at resolutions above 1080p. The 1080p Low result of 196 FPS versus the 1440p Low result of 182 FPS indicates that even at 1440p Low, the GPU is not fully saturated. At 4K, the CPU has ample headroom, as evidenced by the consistent scaling between settings.

The CPU's single-thread performance is particularly relevant for flight simulation, which historically relies heavily on single-threaded simulation logic. The 3,055 Cinebench R23 single-core score and 3,701 Passmark single-thread score indicate strong per-core performance that prevents the CPU from becoming a bottleneck at higher resolutions. The 16 threads provide sufficient parallel capacity for background tasks like scenery loading and AI traffic.

Measured FPS Breakdown

3840x2160 (4K):

• Low: 142 FPS average
• Medium: 110 FPS average, 94 FPS minimum, 127 FPS maximum
• High: 83 FPS average
• Ultra: 79 FPS average

2560x1440 (1440p):

• Low: 182 FPS average
• Medium: 149 FPS average, 127 FPS minimum, 172 FPS maximum
• High: 112 FPS average
• Ultra: 107 FPS average

1920x1080 (1080p):

• Low: 196 FPS average
• Medium: 179 FPS average, 152 FPS minimum, 206 FPS maximum
• High: 139 FPS average
• Ultra: 133 FPS average

The Medium preset is the only configuration with recorded minimum and maximum values, providing insight into frame consistency. At 4K Medium, the 94 FPS minimum represents a 15% drop from the average, while the 127 FPS maximum is 15% higher. At 1440p Medium, the range spans from 127 to 172 FPS, a spread of 45 FPS around the 149 FPS average. The 1080p Medium results show a 152 FPS minimum and 206 FPS maximum, with the 179 FPS average sitting closer to the minimum, suggesting occasional frame dips in demanding scenes.

Comparing settings across resolutions reveals the GPU's scaling efficiency. The 4K-to-1080p ratio at Low settings is 142:196, or approximately 0.72. At Medium, the ratio is 110:179, or 0.61. High settings show 83:139, or 0.60, while Ultra shows 79:133, or 0.59. This tightening ratio at higher settings indicates that as graphical complexity increases, the GPU's performance scales more consistently with resolution, confirming the RTX 5090 as the primary determinant of frame rates in this configuration.