Microsoft Flight Simulator

The AMD Ryzen 7 9800X3D and NVIDIA GeForce RTX 4090 combination delivers a top-tier experience in Microsoft Flight Simulator, ranking 22nd out of 1795 tested combos. The data shows a system that prioritizes raw frame rates across all settings, but the way performance scales with resolution reveals a nuanced balance between CPU and GPU limits. This analysis breaks down the measured FPS to show exactly how this pairing behaves.

Resolution Scaling

The performance drop from 1080p to 4K is dramatic, but the pattern is not uniform across all quality presets. At Low settings, the average frame rate falls from 230.9 FPS at 1920x1080 to 137.1 FPS at 3840x2160, a reduction of roughly 40%. This steep decline indicates that even at Low settings, the GPU begins to become a limiting factor as pixel count increases, although the CPU still has headroom to push high frame rates.

Moving to High settings, the drop is less severe in relative terms: from 136.6 FPS at 1080p down to 77.4 FPS at 4K, a decrease of about 43%. The scaling here is more linear, suggesting that the workload is becoming more balanced between the processor and graphics card. At Medium settings, the numbers are 184 FPS at 1080p and 109.1 FPS at 4K, which is a 41% decline—again showing a consistent scaling pattern.

The most interesting behavior appears at Ultra settings. The frame rate goes from 128.5 FPS at 1080p to 74.4 FPS at 4K, a 42% drop. However, the absolute scores at 1080p and 1440p (128.5 and 103.5 FPS respectively) are close together, suggesting that at these resolutions, the CPU is the primary constraint. The gap between 1440p and 4K is wider (103.5 to 74.4 FPS), indicating that the RTX 4090's rendering workload finally becomes the dominant factor as pixel count rises. Benchmark results indicate that this system is CPU-bound at lower resolutions, with the GPU taking over as the limiting component only at 4K.

FAQ

Q: What is the best resolution for this combo to maintain a high refresh rate?

A: For frame rates above 140 FPS, 1080p with Low settings delivers 230.9 FPS, while Medium settings provide 184 FPS. At 1440p, only Low settings exceed this threshold at 186.1 FPS, so 1080p is the safer choice for high refresh-rate displays.

Q: How does the RTX 4090's memory capacity influence performance?

A: The GPU features 24 GB of GDDR6X memory on a 384-bit bus with 1.01 TB/s of bandwidth. This large frame buffer helps maintain consistent performance at high resolutions, as seen in the 4K results where even Ultra settings hold at 74.4 FPS.

Q: Is the Ryzen 7 9800X3D a bottleneck for the RTX 4090 in this game?

A: The data suggests it is a limiting factor at lower resolutions. At 1080p with Ultra settings, the FPS is 128.5, which is barely higher than the 1440p result of 103.5 FPS. This small gap indicates the CPU is the bottleneck, not the GPU.

Q: What is the performance difference between Low and Ultra settings at 1440p?

A: The average frame rate drops from 186.1 FPS on Low to 103.5 FPS on Ultra, a difference of 82.6 FPS. This shows a significant performance cost for the visual fidelity gained by the Ultra preset.

Q: How does this combo rank against other tested systems?

A: The combination ranks 22nd out of 1795 tested combos for this game, placing it in the top 1.2% of all systems. This is a strong result, but not the absolute best, indicating that some other pairings may offer marginally higher frame rates.

Q: Does the CPU's cache affect performance in this simulation?

A: The Ryzen 7 9800X3D has 96 MB of shared L3 cache, which is substantial. The benchmark results show strong single-thread performance (4800 in Cinebench R23 single-core), which is critical for flight simulators that often rely on a few threads for core simulation logic.

GPU Role

The NVIDIA GeForce RTX 4090 is the undisputed heavyweight in this pairing, with 24 GB of GDDR6X memory running at 21 Gbps effective. Its 384-bit memory bus provides 1.01 TB/s of bandwidth, a figure that allows the card to feed its 16384 shading units without stalling. This is reflected in the benchmark scores, where the GPU achieves a Passmark G3D score of 38194 and a Geekbench OpenCL score of 317684.

The GPU's performance in this game is best understood by looking at the 4K results. At 3840x2160, the RTX 4090 manages 77.4 FPS on High and 74.4 FPS on Ultra. The small difference between these two presets (3 FPS) suggests that the card is approaching its limits at this resolution, and the extra load from Ultra settings has a marginal impact. The base clock of 2235 MHz and boost clock of 2520 MHz provide the raw compute power, but the data shows that the card is not fully utilized until 4K.

The RTX 4090's position relative to its rivals is interesting. Its average benchmark score is 66473, which is 0.4% lower than the NVIDIA Tesla T4 (66733) and 0.5% higher than the NVIDIA Tesla P40 (66127). It also trails the AMD Radeon Pro Vega 56 by 0.9% and the NVIDIA Quadro P6000 by 1.3%. This indicates that while the RTX 4090 is a top-tier consumer card, the gap between it and other professional cards is minimal in synthetic tests. In this game, the 4K Ultra result of 74.4 FPS is the key metric, showing that this GPU is capable of a playable experience at the highest visual settings.

Measured FPS Breakdown

The measured FPS data provides a complete picture of this system's capabilities. At 1920x1080, the results are exceptionally high: Low settings produce 230.9 FPS, Medium 184 FPS, High 136.6 FPS, and Ultra 128.5 FPS. The difference between High and Ultra at this resolution is only 8.1 FPS, which is minimal, suggesting that the CPU is the primary limiter here.

At 2560x1440, the frame rates remain strong but show a clear shift. Low settings deliver 186.1 FPS, Medium 146.1 FPS, High 107.6 FPS, and Ultra 103.5 FPS. The gap between High and Ultra narrows further to 4.1 FPS, reinforcing the idea that the CPU is still a factor. The drop from Low to Medium is 40 FPS, which is a significant step that indicates the GPU is starting to take on more work.

At 3840x2160, the GPU becomes the dominant constraint. Low settings yield 137.1 FPS, Medium 109.1 FPS, High 77.4 FPS, and Ultra 74.4 FPS. The difference between High and Ultra here is just 3 FPS, showing that the RTX 4090 is fully saturated. The scaling from Medium to High is also steep, with a 31.7 FPS drop, which suggests that the High preset introduces effects that are particularly taxing on the GPU.

Overall, the data shows a system that is heavily CPU-bound at 1080p, with GPU limitations becoming apparent at 1440p and dominant at 4K. The RTX 4090's 24 GB of VRAM is likely a buffer against texture-related stutters, but the frame rates are the primary indicator of performance.

Settings Recommendations

For users with a 1080p display, the High preset at 136.6 FPS is the sweet spot. It offers a significant visual improvement over Medium (184 FPS) while still maintaining a frame rate that exceeds most monitors' refresh rates. The Ultra preset is only 8 FPS slower, but the gains in visual quality are often imperceptible in a flight simulator, so High is the practical choice.

At 1440p, the recommendation shifts. The Medium preset at 146.1 FPS is the best balance, as it provides a smooth experience on high-refresh-rate panels. The High preset at 107.6 FPS is also viable for 60 Hz displays, but the drop from Medium is substantial. The Ultra preset at 103.5 FPS is not worth the performance cost, as the difference from High is negligible.

For 4K users, the situation is more constrained. The Low preset at 137.1 FPS is the only option for those seeking high refresh rates. The Medium preset at 109.1 FPS is a solid choice for 60 Hz displays, but the High (77.4 FPS) and Ultra (74.4 FPS) presets are best reserved for users who prioritize visual fidelity over frame rate. Given that the difference between High and Ultra is only 3 FPS, the Ultra preset is the better choice if you are already sacrificing performance for image quality.

The data indicates that the High preset offers the most consistent experience across all resolutions, with frame rates of 136.6, 107.6, and 77.4 FPS at 1080p, 1440p, and 4K respectively. This makes it the recommended default for most users.

CPU Role

The AMD Ryzen 7 9800X3D is a Zen 5 architecture processor with 8 cores and 16 threads, running at a base clock of 4.70 GHz and a boost clock of 5.20 GHz. Its 96 MB of shared L3 cache is a defining feature, providing a large pool of fast memory that helps mitigate the latency of fetching data from DDR5 system memory. This is particularly beneficial in simulations like Microsoft Flight Simulator, where the CPU must handle complex physics and world-streaming calculations.

The CPU's benchmark scores are strong. It achieves a Cinebench R23 multicore score of 34004 and a single-core score of 4800. The single-thread performance is critical for this game, and the 3dmark single-thread score of 1212 confirms that the processor has excellent per-core capability. The 3dmark 8-thread score of 8252 is also notable, as it shows that the CPU can leverage multiple cores effectively when needed.

The Ryzen 7 9800X3D's position relative to rivals is tight. Its average benchmark score is 37780, which is 0.1% lower than the Intel Xeon 6353P (37811) and 0.1% lower than the Intel Core Ultra 5 225 (37831). It also trails the Intel Core i9-13900HK by 0.6% and the Intel Core i5-13600KF by 0.7%. These are marginal differences, indicating that the 9800X3D is competitive but not the absolute fastest in synthetic tests.

In this game, the CPU's role is evident in the 1080p results. The fact that the frame rate only drops from 128.5 FPS at 1080p to 103.5 FPS at 1440p on Ultra settings (a 25 FPS difference) shows that the processor is the limiting factor, not the GPU. This is a classic sign of CPU-bound behavior, and it highlights the importance of the 9800X3D's high single-thread performance. The data confirms that for this pairing, the CPU is the component that determines the ceiling at lower resolutions, while the RTX 4090 takes over as the resolution climbs.