Microsoft Flight Simulator

# Microsoft Flight Simulator — AMD Ryzen 7 3700X + NVIDIA GeForce RTX 5090

The measured data for Microsoft Flight Simulator pairs a Zen 2 eight-core processor with NVIDIA's flagship Blackwell GPU, and the results reveal a system that is consistently GPU-bound at higher resolutions but increasingly CPU-limited as pixel counts drop. The RTX 5090's raw throughput dominates the frame rates at 4K, yet the Ryzen 7 3700X's single-thread performance becomes the bottleneck at 1080p, where the gap between Low and Ultra settings narrows dramatically. This combination ranks 174th out of 1,795 tested combos, placing it in the top tenth of all configurations while still showing notable headroom for a stronger processor.

Resolution Scaling

The FPS drop from 1080p to 4K is steep but not uniform across settings. At Low settings, the average frame rate falls from 138.9 FPS at 1920x1080 to 119.2 FPS at 3840x2160 — a reduction of 19.7 FPS, or roughly 14%. Moving to Ultra settings, the decline is sharper: 113.9 FPS at 1080p drops to 78.2 FPS at 4K, a 35.7 FPS loss (31%). This pattern indicates that at Low settings, the CPU is the limiting factor even at 4K, since the RTX 5090 has ample headroom to render simple scenes. At Ultra, the GPU workload expands enough to shift the balance toward graphics-bound performance, yet the 1080p-to-1440p transition at Ultra (113.9 to 103.8 FPS) is only a 10.1 FPS drop, while the 1440p-to-4K step (103.8 to 78.2 FPS) costs 25.6 FPS — a classic sign of pixel-throughput saturation.

The data suggests that resolution scaling is not linear. Between 1080p and 1440p at High settings, the average FPS falls from 117.7 to 108.5 (9.2 FPS lost), but between 1440p and 4K at High, the drop is 108.5 to 83.9 (24.6 FPS lost). This accelerating decline points to the RTX 5090's memory bandwidth and rasterization limits becoming the dominant constraint as pixel count quadruples. Interestingly, the Low preset exhibits the smallest relative scaling penalty, which implies the Ryzen 7 3700X is holding back performance even at 4K — the CPU's 8 cores and 16 threads at 3.60 GHz base and 4.40 GHz boost cannot feed the GPU fast enough to fully utilize its 104.8 TFLOPS of FP32 compute.

GPU Role

The NVIDIA GeForce RTX 5090 brings 32 GB of GDDR7 memory on a 512-bit bus, delivering 1.79 TB/s of bandwidth. This massive memory subsystem is directly relevant to Microsoft Flight Simulator, which streams terrain and scenery data continuously. The measured frames at 4K Ultra (78.2 FPS) suggest the GPU is working hard but not maxed out, as the Low preset at the same resolution produces 119.2 FPS — a 41 FPS difference that cannot be explained by GPU compute alone. The RTX 5090's boost clock of 2407 MHz and base of 2017 MHz provide the raw speed needed for high pixel rates, and its 176 ROPs handle the fill-rate demands of 3840x2160.

The benchmark data shows the RTX 5090's percentile rank of 94 among all GPUs, with an average benchmark score of 84,306. Its nearest rival, the RTX 5090 D, scores 84,241 (0.1% higher), while the RTX 5050 Mobile trails by 0.2% at 84,171. This GPU is clearly a top-tier part, yet the measured FPS in Flight Simulator at 1080p Ultra (113.9 FPS) versus 4K Ultra (78.2 FPS) reveals that the game's engine does not scale perfectly with the GPU's theoretical capabilities. The 170 RT cores and 680 tensor cores are underutilized in this simulation title, which leans more on raw rasterization and memory bandwidth — areas where the RTX 5090's 1.79 TB/s bandwidth and 423.6 GPixel/s pixel rate excel.

CPU Role

The AMD Ryzen 7 3700X is a Zen 2 (Matisse) processor with 8 cores and 16 threads, running at 3.60 GHz base and 4.40 GHz boost. Its Cinebench R23 single-core score of 2,694 and multi-core score of 19,087 place it in the 85th percentile of all CPUs, but in a flight simulator known for heavy single-threaded physics and scenery processing, these numbers tell a revealing story. The measured FPS at 1080p Low (138.9 FPS) versus 4K Low (119.2 FPS) shows only a 19.7 FPS difference, which means the CPU is the limiting factor even at 4K when graphical load is light. The Ryzen 7 3700X's nearest rival, the Intel Core i5-12600, scores 28,654 on average benchmark — a mere 0.1% difference — indicating this CPU is competitive with mid-range modern parts.

However, the data reveals a bottleneck. At 1080p, going from Low to Ultra only costs 25 FPS (138.9 to 113.9), while at 4K the same settings change costs 41 FPS (119.2 to 78.2). This asymmetry suggests that the CPU is saturating at around 113-119 FPS in this game, regardless of resolution, when the GPU is not heavily loaded. The Ryzen 7 3700X's 32 MB of L3 cache and dual-channel DDR4-3200 memory (51.2 GB/s bandwidth) may be insufficient to feed the RTX 5090's appetite for draw calls and world data. The 3,800 million transistors on a 74 mm² die at 7 nm process represent a mature design, but its 2019 architecture cannot match the IPC of newer CPUs, which the benchmark data confirms through its modest single-thread scores.

Settings Recommendations

The measured rows provide clear guidance for optimal settings. At 4K, the Medium preset delivers 108.4 FPS, which is 30.2 FPS higher than Ultra (78.2 FPS) while remaining above the 100 FPS threshold for smooth simulation. The High preset at 4K yields 83.9 FPS, only 4.4 FPS below the Medium setting, but the jump from High to Ultra costs 5.7 FPS — a marginal visual gain for a significant performance hit. At 1440p, Medium (121.8 FPS) offers the best balance, as High (108.5 FPS) and Ultra (103.8 FPS) both dip below the 110 FPS mark, while Low (131.8 FPS) provides minimal visual benefit over Medium for a 10 FPS gain.

For 1080p users, the data shows that Medium (127.5 FPS) is the sweet spot, since the difference between Medium and Low (138.9 FPS) is 11.4 FPS, but the visual quality improvement from Medium to High (117.7 FPS) costs only 9.8 FPS. The Ultra preset at 1080p (113.9 FPS) is 13.6 FPS slower than Medium, making it a poor trade-off unless visual fidelity is paramount. Given that the RTX 5090 is capable of higher frame rates in other titles, the CPU bottleneck at 1080p means users should prioritize GPU load — running at 1440p Medium (121.8 FPS) or 4K Medium (108.4 FPS) leverages the GPU more effectively than 1080p Ultra (113.9 FPS) while providing better image quality.

How This Combo Ranks

This combination of AMD Ryzen 7 3700X and NVIDIA GeForce RTX 5090 ranks 174th out of 1,795 tested combos in Microsoft Flight Simulator, placing it in the top 9.7% of all configurations. The ranking reflects the substantial GPU power but is tempered by the older CPU. The RTX 5090's 94th percentile GPU score and the Ryzen 7 3700X's 85th percentile CPU score suggest that this pairing is imbalanced — the GPU is a top-6% part while the CPU is a top-15% part, and the game's engine amplifies the CPU's limitations. The data indicates that a newer processor with higher single-thread performance would likely push this combo into the top 100, as the measured FPS at 1080p Low (138.9) is far below what the RTX 5090 could achieve with a stronger CPU.

The combo's rank of 174 also reflects the game's unique demands. Microsoft Flight Simulator is not a typical GPU-bound title; its simulation logic and scenery streaming tax the CPU heavily, as evidenced by the relatively small FPS differences between Low and Ultra at 1080p. The Ryzen 7 3700X's 8 cores are sufficient for the game's multi-threaded rendering, but its 4.40 GHz boost clock and Zen 2 architecture limit the frame rate ceiling. This ranking suggests that while the RTX 5090 provides a strong foundation, the full potential of this GPU in Flight Simulator remains untapped until paired with a faster processor.

Measured FPS Breakdown

At 1920x1080, the measured average FPS values are: Low 138.9, Medium 127.5, High 117.7, and Ultra 113.9. The spread from Low to Ultra is 25.0 FPS, with each successive preset costing approximately 10-11 FPS until the final step from High to Ultra, which only costs 3.8 FPS — indicating diminishing returns at the highest settings. At 2560x1440, the results are: Low 131.8, Medium 121.8, High 108.5, and Ultra 103.8. Here, the gap from Low to Ultra is 28.0 FPS, and the step from Medium to High (13.3 FPS) is the largest penalty, suggesting that High settings introduce a significant shading or texture load. At 3840x2160, the values are: Low 119.2, Medium 108.4, High 83.9, and Ultra 78.2. The drop from Medium to High is 24.5 FPS — a massive penalty that dominates the scaling curve — while the final step to Ultra costs only 5.7 FPS.

The data reveals a consistent pattern: Low settings at any resolution are CPU-bound, while Ultra settings at 4K are GPU-bound. The 4K Medium result (108.4 FPS) is nearly identical to 1440p High (108.5 FPS), which suggests that the game's rendering pipeline at Medium settings offloads enough work to the GPU that the CPU bottleneck is masked. Conversely, 1080p Ultra (113.9 FPS) is only 5.5 FPS faster than 4K Ultra (78.2 FPS), a modest gain that underscores how the Ryzen 7 3700X limits the RTX 5090's ability to stretch its legs at lower resolutions.

FAQ

Q: Why does the FPS drop so little between 1080p and 4K at Low settings?

A: At Low settings, the Ryzen 7 3700X becomes the primary bottleneck. The FPS falls from 138.9 at 1080p to 119.2 at 4K, a 19.7 FPS drop, because the GPU has enough headroom at both resolutions — the CPU's 8 cores and 16 threads at up to 4.40 GHz cannot generate frames faster than roughly 119-139 FPS in this simulation.

Q: Is the RTX 5090's 32 GB of VRAM necessary for this game?

A: The data does not show VRAM usage, but the 32 GB GDDR7 memory with 1.79 TB/s bandwidth is part of what enables the GPU to maintain 78.2 FPS at 4K Ultra. The memory subsystem is likely not saturated at these settings, but the high bandwidth helps with streaming terrain data.

Q: How does the Ryzen 7 3700X compare to its nearest rivals in overall CPU benchmarks?

A: The Ryzen 7 3700X's average benchmark score of 28,631 is 0.1% lower than the Intel Core i5-12600 (28,654) and 0.1% higher than the AMD Ryzen 5 5600XT (28,591). This places it in a tight competitive band with modern mid-range processors.

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

A: According to the data, 1440p Medium (121.8 FPS) or 4K Medium (108.4 FPS) both provide frame rates above 100 FPS while leveraging the RTX 5090's strengths. At 1080p, even Ultra (113.9 FPS) is playable, but the CPU limits the GPU's potential.

Q: Why is the 4K High setting (83.9 FPS) so much slower than 4K Medium (108.4 FPS)?

A: The 24.5 FPS penalty from Medium to High at 4K suggests that High settings introduce a significant increase in GPU workload, likely from more detailed shadows, textures, or draw distances. This is the largest single-setting penalty in the entire dataset.

Q: Does this combo rank as a top-tier configuration for Flight Simulator?

A: It ranks 174th out of 1,795 combos, placing it in the top 9.7%. The RTX 5090's raw power is evident, but the Ryzen 7 3700X's single-thread performance prevents this from being a top-100 setup in this specific game.