Microsoft Flight Simulator

The Intel Core i5-11400F paired with the NVIDIA GeForce RTX 3080 delivers a performance curve in Microsoft Flight Simulator that clearly illustrates the shifting balance between CPU and GPU load as resolution changes. At 1080p, the system is heavily CPU-bound, but by 4K, the GPU takes over as the primary limiting factor. The data shows a 1080p Low average of 159.4 FPS, which is the highest frame rate recorded for this combo in any configuration. Stepping up to 1440p Low drops that to 125.3 FPS, a 21% reduction, while 4K Low yields 94.7 FPS, a further 24% drop from 1440p. This scaling pattern suggests that at lower resolutions, the i5-11400F’s six cores and twelve threads are keeping pace with the RTX 3080’s output, but the frame rate is still constrained by the CPU’s single-thread performance, which is a critical factor for this simulator’s complex flight dynamics and world-rendering logic.

The story changes dramatically when you look at Ultra settings. At 1080p Ultra, the average is 88.4 FPS. Moving to 1440p Ultra yields 68.2 FPS, a 23% decline, and 4K Ultra produces 51.4 FPS, a 25% drop from 1440p. Notice that the percentage drop from 1080p to 1440p is similar between Low (21%) and Ultra (23%), but the absolute frame rates are much lower at Ultra. This indicates that while the RTX 3080’s 10 GB of GDDR6X memory and 8704 shading units are being pushed harder at higher settings, the CPU is still a bottleneck even at Ultra, preventing the GPU from fully stretching its legs at lower resolutions. At 4K Ultra, the system only manages 51.4 FPS, which is playable but not smooth for a flight simulator where precise control is paramount. The gap between Low and Ultra at 4K is 43.3 FPS, showing that the GPU has significant headroom when the CPU is less stressed, but the overall experience at 4K Ultra is still limited.

Resolution Scaling

The data reveals a clear pattern: this combo scales better with resolution when settings are lowered. At Low settings, the frame rate drops from 159.4 FPS at 1080p to 125.3 FPS at 1440p and finally to 94.7 FPS at 4K. That is a total drop of 40.6% from 1080p to 4K. At Ultra settings, the drop from 88.4 FPS to 51.4 FPS represents a 41.8% reduction. The similarity in these percentages suggests that the RTX 3080 is the limiting factor at 4K regardless of settings, but the absolute numbers tell a more nuanced story. At 1080p Low, the system is clearly CPU-bound; the i5-11400F’s boost clock of 4.40 GHz is likely the ceiling. The 159.4 FPS figure is impressive, but it does not scale linearly with the GPU’s raw compute power, which is rated at 29.77 TFLOPS FP32. If the GPU were the only constraint, you would expect a larger jump from 1080p to 1440p, but the modest 21% drop suggests the CPU is holding back the GPU at 1080p.

Moving to Medium settings, the frame rates are 125.3 FPS at 1080p, 100.1 FPS at 1440p, and 72.6 FPS at 4K. The drop from 1080p to 1440p is 20%, while the drop from 1440p to 4K is 27.5%. This inflection point indicates that at Medium settings, the GPU begins to exert more influence at 1440p, but the CPU still matters. High settings show a similar trend: 94.2 FPS at 1080p, 75.9 FPS at 1440p, and 53.6 FPS at 4K. The 1080p to 1440p drop is 19.4%, while the 1440p to 4K drop is 29.4%. This widening gap between resolution steps as settings increase confirms that the RTX 3080 is becoming the bottleneck at higher resolutions and quality presets. For a flight simulator, where the viewport often includes vast terrain and complex scenery, the 4K High average of 53.6 FPS is serviceable, but the 4K Ultra figure of 51.4 FPS is close to the edge of acceptable smoothness.

FAQ

Q: What is the best resolution for smooth gameplay with this combo?

A: At 1080p, the combo delivers over 88 FPS at Ultra settings and 159.4 FPS at Low. At 1440p, the High preset yields 75.9 FPS, which is playable, but Ultra drops to 68.2 FPS. For a consistent 60+ FPS experience, 1440p High is the highest resolution and setting combination that reliably exceeds that threshold.

Q: How does the CPU affect performance at 1080p versus 4K?

A: The i5-11400F, with 6 cores and 12 threads and a boost clock of 4.40 GHz, is the limiting factor at 1080p Low, where it reaches 159.4 FPS. At 4K, the GPU’s workload dominates, and the CPU’s influence diminishes. The evidence is that the percentage drop from 1080p to 4K is similar across all settings, but the absolute frame rates at 4K are more dependent on the GPU’s 10 GB memory bandwidth of 760.3 GB/s.

Q: Is the RTX 3080 overkill for this CPU in this game?

A: The data suggests not entirely. At 1080p Ultra, the combo scores 88.4 FPS, which is decent, but the CPU prevents the GPU from reaching its full potential. At 4K Ultra, the GPU is the clear bottleneck, scoring 51.4 FPS. The RTX 3080’s average benchmark score of 35787 places it in the 80th percentile of all GPUs, and its nearest rival, the AMD Radeon RX 7900 GRE, is only 0.9% slower, indicating the GPU has substantial headroom that the CPU cannot always feed at lower resolutions.

Q: What settings provide the largest performance jump?

A: The biggest jump is from High to Low at any resolution. At 1080p, Low is 159.4 FPS versus 94.2 FPS at High, a 65.2 FPS difference. At 4K, Low is 94.7 FPS versus 53.6 FPS at High, a 41.1 FPS difference. This suggests that the High preset includes effects that heavily tax the GPU, while Low removes them entirely.

Q: Can this combo handle 4K gaming?

A: Yes, but with caveats. At 4K Low, the system averages 94.7 FPS, which is excellent. At 4K Medium, it drops to 72.6 FPS, which is still smooth. However, 4K High (53.6 FPS) and 4K Ultra (51.4 FPS) are below the 60 FPS threshold that many players prefer for a simulator. The 4K Ultra figure is particularly low, suggesting that the RTX 3080’s 10 GB VRAM is a limiting factor at that preset.

CPU Role

The Intel Core i5-11400F is a 6-core, 12-thread processor based on the Rocket Lake architecture, built on Intel’s 14 nm process. Its base clock is 2.60 GHz, and it boosts to 4.40 GHz. In synthetic benchmarks, it scores 14372 in Cinebench R23 multicore and 2029 in single-core. These numbers are relevant because Microsoft Flight Simulator is known to be sensitive to single-thread performance due to its simulation loop, which cannot be fully parallelized. The CPU’s percentile rank of 75 among all CPUs indicates it is a mid-to-upper-tier part, but its nearest rivals include the AMD Ryzen 7 5700U (0% delta) and the Intel Core i7-1260P (-0.2% delta), which are mobile parts with similar average scores. This suggests that the i5-11400F’s desktop performance is roughly on par with high-end mobile chips, which confirms its efficiency but also a hint that it is not a top-tier desktop CPU.

In this game, the CPU’s role is most apparent at 1080p Low, where the frame rate hits 159.4 FPS. That is the highest score in the entire measured dataset, and it is likely close to the CPU’s maximum throughput. The fact that increasing the resolution to 1440p Low only drops the frame rate to 125.3 FPS (a 21% reduction) while the GPU is doing more work suggests that the CPU is still the primary limiter at 1440p Low. However, at 4K Ultra, the frame rate collapses to 51.4 FPS, which is a 68% drop from 1080p Ultra. This indicates that the RTX 3080’s 320-bit memory bus and 760.3 GB/s bandwidth are being saturated, and the CPU can no longer keep up with the GPU’s output. The 12 MB of shared L3 cache on the CPU is adequate for the game’s data streaming, but it is not a substitute for the GPU’s raw fill rate.

Settings Recommendations

Based on the measured FPS, the best balance of visual quality and performance is the High preset at 1440p, which yields 75.9 FPS. This is above the 60 FPS threshold and offers a significant visual upgrade over Medium, which scores 100.1 FPS at the same resolution. The difference between High and Medium is 24.2 FPS at 1440p, which is noticeable, but High’s 75.9 FPS is still smooth enough for most users. If you are playing at 1080p, the Ultra preset at 88.4 FPS is the best choice, as it provides the highest visual fidelity without sacrificing playability. The jump from High to Ultra at 1080p is only 5.8 FPS (from 94.2 to 88.4), which is a small cost for the extra detail.

At 4K, the situation is more constrained. The Medium preset at 72.6 FPS is the best option for maintaining a playable frame rate, as High and Ultra drop to 53.6 and 51.4 FPS, respectively. The gap between Medium and High at 4K is 19 FPS, which is substantial, but High’s 53.6 FPS is borderline for a simulator where smooth camera panning is essential. If you have a 4K display and prefer visual fidelity over frame rate, High is acceptable, but Medium is the safer bet for consistent performance. For users with high-refresh-rate 1080p monitors, the Low preset at 159.4 FPS is the only way to fully utilize a 144 Hz display, but it comes at the cost of visual details. The data clearly shows that the combo is best utilized at 1440p High, where both the CPU and GPU are well-balanced.

How This Combo Ranks

Out of 1795 tested combos in Microsoft Flight Simulator, this pairing of the Intel Core i5-11400F and NVIDIA GeForce RTX 3080 ranks 522nd. That places it in the top 29% of all tested configurations, which is respectable but not exceptional. The rank reflects the CPU’s mid-tier status; the RTX 3080 is a high-end GPU (80th percentile), but the i5-11400F is only in the 75th percentile of CPUs. The combo’s average FPS across all settings and resolutions is strong, but it is held back by the CPU at lower resolutions. The RTX 3080’s nearest rivals include the AMD Radeon RX 7900 GRE, which is 0.9% faster on average, and the NVIDIA GeForce RTX 5070 Ti Mobile, which is 1% slower. None of these rivals are paired with the same CPU in this dataset, so the rank is a direct measure of this specific combination’s capability.

The rank of 522 suggests that there are 521 other combos that perform better, likely featuring higher-end CPUs like the Intel Core i7-1260P (which is 0.2% slower in CPU benchmarks) or AMD parts with more cores. However, the rank also indicates that this combo outperforms the majority of systems tested, making it a viable mid-range-to-high-end option. For a flight simulator, where frame rates above 60 FPS are often more important than raw pixel counts, this combo’s ability to hit 75.9 FPS at 1440p High is a strong result. The rank is a holistic number that accounts for all resolutions and settings, so the 4K Ultra score of 51.4 FPS drags it down, but the 1080p Low score of 159.4 FPS pulls it up.

Measured FPS Breakdown

The full dataset provides a comprehensive view of the combo’s performance across three resolutions and four settings presets. At 1920x1080, the Low preset delivers 159.4 FPS, Medium delivers 125.3 FPS, High delivers 94.2 FPS, and Ultra delivers 88.4 FPS. The difference between Low and Ultra is 71 FPS, which is a 44.5% reduction. At 2560x1440, the scores are 125.3 FPS (Low), 100.1 FPS (Medium), 75.9 FPS (High), and 68.2 FPS (Ultra). The drop from Low to Ultra is 57.1 FPS, or 45.6%. At 3840x2160, the scores are 94.7 FPS (Low), 72.6 FPS (Medium), 53.6 FPS (High), and 51.4 FPS (Ultra). The drop from Low to Ultra is 43.3 FPS, or 45.7%.

Notably, the 1080p Medium score of 125.3 FPS is identical to the 1440p Low score of 125.3 FPS. This suggests that the CPU is the limiting factor in both cases, as the GPU is doing more work at 1440p but the frame rate does not change. Similarly, the 4K Medium score of 72.6 FPS is close to the 1440p Ultra score of 68.2 FPS, indicating that the GPU is becoming the bottleneck at these higher settings. The data shows that the combo is most efficient at 1440p, where the CPU and GPU are better matched. At 1080p, the CPU holds the GPU back, and at 4K, the GPU’s 10 GB VRAM and 760.3 GB/s bandwidth are stretched thin. For the best experience, 1440p High at 75.9 FPS is the sweet spot, offering a balance of visual quality and smoothness that neither 1080p Ultra nor 4K Medium can match.