Microsoft Flight Simulator

The Intel Core i9-14900K paired with the AMD Radeon RX 6800 XT delivers a performance curve in Microsoft Flight Simulator that clearly shifts from a balanced workload at 1080p to a heavily GPU-limited one at 4K. At 1080p with Low settings, the combo produces an average of 149.6 FPS, which drops to 120.6 FPS at Medium and 91.3 FPS at High. The gap between Low and Medium is 29 FPS, while the step from Medium to High is another 29.3 FPS, indicating that the CPU has ample headroom to feed the GPU at lower presets. At 1080p Ultra, the average falls to 84.9 FPS, a 43.2% reduction from the Low preset, showing that even at the lowest resolution, the graphics load begins to constrain the frame rate. The scaling pattern across 1080p reveals a diminishing returns curve: each settings tier adds more visual work, but the frame rate penalty grows as the GPU approaches its utilization ceiling.

Moving to 1440p, the same combo yields 120.1 FPS at Low, 92.5 FPS at Medium, 69.6 FPS at High, and 69.8 FPS at Ultra. The difference between High and Ultra at this resolution is negligible—just 0.2 FPS—which strongly suggests that the Ultra preset at 1440p introduces settings that are not fully leveraging the hardware, likely due to a CPU bottleneck on certain simulation threads or a GPU memory bandwidth limit. The drop from Low to Medium at 1440p is 27.6 FPS, and from Medium to High it is 22.9 FPS, a steeper relative decline than at 1080p, confirming that the RX 6800 XT is increasingly the limiting factor as pixel count rises. At 4K, the pattern becomes pronounced: Low averages 87.2 FPS, Medium drops to 66.5 FPS, High falls to 51.7 FPS, and Ultra bottoms out at 46.5 FPS. The scaling from 1440p Low (120.1 FPS) to 4K Low (87.2 FPS) is a 27.4% reduction, while 4K Ultra (46.5 FPS) is 33.4% slower than 1440p Ultra (69.8 FPS). This data indicates that at 4K, the GPU is the dominant constraint, as the CPU’s high single-thread performance (Cinebench R23 single-core score of 7040) cannot compensate for the raw pixel throughput demands.

FAQ

Q: What is the best resolution for this combo in Microsoft Flight Simulator if targeting 60 FPS?

A: Based on the measured FPS data, the combo exceeds 60 FPS at 1440p on High (69.6 FPS) and Medium (92.5 FPS), but falls short at 4K on High (51.7 FPS) and Ultra (46.5 FPS). For a consistent 60 FPS experience, 1440p with High settings is the highest quality preset that meets this threshold, while 4K requires dropping to Low (87.2 FPS) or Medium (66.5 FPS) to stay above 60.

Q: How does the GPU’s 16 GB VRAM influence the results at 4K Ultra?

A: The RX 6800 XT carries 16 GB of GDDR6 memory on a 256-bit bus with 512.0 GB/s bandwidth. At 4K Ultra, the average FPS is 46.5, which is the lowest measured in the dataset. The VRAM capacity is unlikely to be the limiting factor given the size, but the 512.0 GB/s bandwidth may constrain texture streaming in a simulation-heavy title like Microsoft Flight Simulator, where the data shows a 10.1% FPS drop from High (51.7 FPS) to Ultra (46.5 FPS) at 4K.

Q: Is the Intel Core i9-14900K bottlenecking the RX 6800 XT at 1080p?

A: The data suggests partial CPU limitation at 1080p Low, where the combo hits 149.6 FPS. The CPU’s Passmark single-thread score is 4697, and its Cinebench R23 single-core score is 7040, placing it in the 97th percentile of all CPUs. The 1080p Low result is 71.9% higher than the 4K Low result (87.2 FPS), indicating that at lower resolutions, the CPU’s thread scheduling and simulation logic can still push high frame rates, but the GPU becomes the ceiling once pixel load increases.

Q: What does the combo’s rank of 632 out of 1795 mean?

A: The comboRankInGame field places this pairing at position 632 out of 1795 tested combinations for Microsoft Flight Simulator. This means it performs better than roughly 64.8% of all combos tested, but it is not in the top tier. Given the CPU’s 97th percentile rank and the GPU’s 87th percentile rank, the overall ranking is slightly lower than each component’s individual percentile, reflecting the game’s sensitivity to balanced hardware rather than raw component strength.

Q: How does the RX 6800 XT’s clock speed relate to its FPS at 4K?

A: The GPU has a base clock of 1825 MHz, a game clock of 2015 MHz, and a boost clock of 2250 MHz. At 4K Ultra, the average FPS is 46.5, while at 4K Low it is 87.2. The boost clock of 2250 MHz is the maximum achievable, but in practice, the sustained game clock of 2015 MHz is more representative of real-world load. The 40.7 FPS difference between Low and Ultra at 4K suggests that the GPU’s clock speed is not the bottleneck; rather, the shading units (4608) and texture rate (648.0 GTexel/s) are working near capacity at higher presets.

Q: Is this combo better suited for 1440p or 1080p gaming?

A: Benchmark results indicate a sweet spot at 1440p. At 1440p Ultra, the combo averages 69.8 FPS, which is only 0.2 FPS higher than 1440p High (69.6 FPS), suggesting that the Ultra preset at this resolution does not add meaningful performance cost. In contrast, 1080p Ultra (84.9 FPS) is 15.1 FPS higher than 1440p Ultra, but the visual fidelity gain at 1440p is substantial. The 4K Ultra result of 46.5 FPS is below the 60 FPS target, making 1440p the recommended resolution for this pairing.

How This Combo Ranks

The comboRankInGame of 632 out of 1795 places this pairing in the upper third of all tested combinations for Microsoft Flight Simulator. This ranking is notable because the CPU itself sits in the 97th percentile of all CPUs, with an average benchmark score of 79824, and the GPU sits in the 87th percentile of all GPUs, with an average benchmark score of 49982. The discrepancy between the component-level percentiles and the in-game rank indicates that Microsoft Flight Simulator does not reward raw compute power as much as other titles; it favors a balanced system where neither the CPU nor GPU is disproportionately weak. The CPU’s nearest rival, the AMD EPYC 7413, has an average score of 80041, which is 0.3% higher, while the Intel Core i9-14900KF scores 79245, 0.7% lower. This marginal gap suggests that the 14900K’s performance is already near the ceiling for its platform, and the in-game rank is more dependent on the GPU pairing.

The GPU’s nearest rival, the Intel Arc A550M, scores 49737 on average, which is 0.5% lower than the RX 6800 XT’s 49982. The NVIDIA RTX A1000 scores 50826, 1.7% higher, and the NVIDIA CMP 50HX scores 49071, 1.9% lower. These small deltas imply that the RX 6800 XT is competitively positioned within its performance class, but the in-game rank of 632 suggests that the pairing with the 14900K does not boost it to top-tier status. The 1440p results—120.1 FPS at Low and 69.8 FPS at Ultra—show that this combo can handle high refresh rates at lower presets, but the 4K Ultra result of 46.5 FPS places it below the threshold for smooth 4K gaming. Relative to the full field of 1795 combos, this pairing is solidly mid-pack, outperforming the majority but not challenging the top 100, which likely feature higher-end GPUs with more shading units and memory bandwidth.

Measured FPS Breakdown

At 1920x1080, the combo delivers an average of 149.6 FPS on Low settings, 120.6 FPS on Medium, 91.3 FPS on High, and 84.9 FPS on Ultra. The spread from Low to Ultra is 64.7 FPS, with the largest single drop occurring between Low and Medium (29.0 FPS) and the smallest between High and Ultra (6.4 FPS). This suggests that the Low preset is largely CPU-limited, while the High-to-Ultra transition adds minimal visual benefit for a relatively small performance cost. At 2560x1440, the average FPS values are 120.1 (Low), 92.5 (Medium), 69.6 (High), and 69.8 (Ultra). The High and Ultra results are nearly identical, differing by only 0.2 FPS, which is within measurement noise and indicates that the Ultra preset at 1440p does not increase the GPU workload enough to impact frame rates. The drop from Low to Medium at 1440p is 27.6 FPS, and from Medium to High it is 22.9 FPS, showing a consistent scaling pattern.

At 3840x2160, the average FPS drops to 87.2 (Low), 66.5 (Medium), 51.7 (High), and 46.5 (Ultra). The 4K results show a more linear decline: Low to Medium is a 20.7 FPS drop, Medium to High is a 14.8 FPS drop, and High to Ultra is a 5.2 FPS drop. This pattern indicates that at 4K, the GPU is the primary bottleneck, and each settings tier adds a proportionally smaller performance penalty as the GPU approaches its limits. Comparing resolutions at the same settings, 1080p Low (149.6 FPS) to 1440p Low (120.1 FPS) is a 19.7% reduction, and 1440p Low to 4K Low (87.2 FPS) is a 27.4% reduction. For Ultra settings, the 1080p to 1440p drop is 17.8% (84.9 to 69.8 FPS), and the 1440p to 4K drop is 33.4% (69.8 to 46.5 FPS). The data shows that the combo is capable of high frame rates at 1080p, playable at 1440p, and only suitable for 4K at lower presets.

GPU Role

The AMD Radeon RX 6800 XT is built on the RDNA 2.0 architecture with a Navi 21 chip manufactured on a 7 nm process. It features 4608 shading units, 288 texture mapping units, and 128 render output units, with 72 ray tracing cores. The GPU has a base clock of 1825 MHz, a game clock of 2015 MHz, and a boost clock of 2250 MHz. Its memory subsystem consists of 16 GB of GDDR6 on a 256-bit bus, delivering 512.0 GB/s of bandwidth. These specifications are directly relevant to the measured FPS in Microsoft Flight Simulator. The 16 GB VRAM is ample for the game’s texture loads at 4K, as evidenced by the fact that the 4K results do not show sudden stutters or crashes, but the 512.0 GB/s bandwidth may limit the rate at which textures are streamed in during flight, contributing to the 46.5 FPS at 4K Ultra.

The GPU’s FP32 performance of 20.74 TFLOPS and texture rate of 648.0 GTexel/s are the key compute resources that scale with resolution. At 1080p, the 149.6 FPS Low result shows that the CPU can feed the GPU fast enough, but at 4K, the GPU’s pixel rate of 288.0 GPixel/s becomes the limiting factor. The boost clock of 2250 MHz is not sustained across all workloads; the game clock of 2015 MHz is more representative of the average load, and the data shows that this is insufficient to maintain 60 FPS at 4K High (51.7 FPS). The GPU’s percentile rank of 87 places it above the majority of GPUs, but its nearest rivals—the Intel Arc A550M (0.5% lower) and NVIDIA RTX A1000 (1.7% higher)—show that it is in a tight performance band. In this game, the GPU’s role is decisive at 4K, where the 46.5 FPS Ultra result is 68.9% lower than the 1080p Low result, highlighting how the RX 6800 XT’s compute resources are fully utilized only at higher resolutions.