Microsoft Flight Simulator

Microsoft Flight Simulator presents one of the more demanding rendering workloads in the current benchmark suite, and the pairing of the AMD Ryzen 9 5900X with the AMD Radeon RX 7900 XTX produces a distinct performance profile across resolutions and quality presets. The measured data, captured at High, Medium, Low, and Ultra settings for 1080p, 1440p, and 4K, reveals a system that is heavily influenced by both CPU simulation overhead and GPU rasterization limits, depending on the configuration. This analysis breaks down the scaling behavior, component roles, and overall ranking of this specific combo within the broader tested database.

Resolution Scaling

The frame rate data shows a clear and expected decline as resolution increases, but the magnitude of the drop is highly dependent on the quality preset. At the High preset, the average frame rate falls from 113.1 FPS at 1920x1080 to 88.3 FPS at 2560x1440, a reduction of 24.8 FPS, and then further to 67.7 FPS at 3840x2160, representing a total drop of 45.4 FPS from 1080p to 4K. This scaling pattern indicates that at 1080p High, the system is not purely GPU-bound, as the performance headroom allows the CPU to play a more significant role in determining the final output.

The Low preset exhibits the most dramatic scaling, with frame rates starting at 181.2 FPS at 1080p, dropping to 150.4 FPS at 1440p, and then falling to 108.9 FPS at 4K. The 72.3 FPS difference between 1080p and 4K at Low settings is substantial, but the high absolute values at lower resolutions suggest that the CPU is the primary limiter at 1080p, preventing the GPU from fully saturating its potential. In contrast, the Ultra preset shows the least relative scaling, moving from 103.9 FPS at 1080p to 82.6 FPS at 1440p and finally 60.1 FPS at 4K, a total drop of 43.8 FPS. The fact that Ultra at 1080p yields only 103.9 FPS, which is lower than the High preset's 113.1 FPS at the same resolution, underscores the increased GPU load from higher-quality assets.

The Medium preset follows a similar trajectory to High, with 150.9 FPS at 1080p, 116.3 FPS at 1440p, and 88.9 FPS at 4K. The data suggests that at 4K, all presets converge toward a narrower range, with Low at 108.9 FPS and Ultra at 60.1 FPS, indicating that the GPU becomes the dominant constraint at that resolution. The scaling from 1440p to 4K is steeper than from 1080p to 1440p across all presets, which is consistent with the exponential increase in pixel count that heavily taxes the Radeon RX 7900 XTX's rendering pipeline.

GPU Role

The AMD Radeon RX 7900 XTX, based on the RDNA 3.0 architecture and the Navi 31 chip, is the primary driver of visual fidelity in this configuration. With 24 GB of GDDR6 memory on a 384-bit bus, the card provides a memory bandwidth of 960.0 GB/s, which is particularly relevant for Microsoft Flight Simulator's large texture and terrain datasets. The GPU's clock speeds, with a base of 1929 MHz, a game clock of 2365 MHz, and a boost clock of 2498 MHz, allow for substantial throughput, evidenced by its FP32 performance of 61.39 TFLOPS and a texture rate of 959.2 GTexel/s.

The GPU's role becomes more pronounced at higher resolutions. At 4K Ultra, the average frame rate of 60.1 FPS is the lowest measured in the dataset, indicating that the card is working near its limits to maintain playable performance with maximum graphical settings. The pixel rate of 479.6 GPixel/s and the 192 ROPs are critical for filling the 3840x2160 framebuffer, and the data shows that the card can handle this load but not with excessive headroom. At 1080p Low, the 181.2 FPS result is likely capped by CPU limitations rather than GPU capabilities, as the RX 7900 XTX's compute power is far beyond what is needed for such a modest workload.

The GPU's benchmark scores further contextualize its performance. A Passmark G3D score of 31238 and a 3DMark Steel Nomad DX12 score of 6841 position the card in the 85th percentile of all GPUs. Its nearest rivals include the NVIDIA GeForce RTX 4070 Ti with an average score of 44900 and a deltaPct of -2, and the NVIDIA GeForce RTX 4090 Mobile with a score of 43667 and a deltaPct of 0.8. This indicates that the RX 7900 XTX is competitive with top-tier consumer cards, though its specific performance in Flight Simulator is also influenced by driver optimization and the game's engine characteristics.

CPU Role

The AMD Ryzen 9 5900X, with 12 cores and 24 threads based on the Zen 3 (Vermeer) architecture, provides the computational foundation for the simulation's physics and AI logic. Its base clock of 3.70 GHz and boost clock of 4.80 GHz, coupled with a 64 MB L3 cache, are well-suited for the single-threaded and lightly-threaded workloads that dominate flight simulation code. The CPU's benchmark results show strong multi-threaded performance, with a Cinebench R23 multicore score of 33150 and a Passmark multithread score of 39002, placing it in the 90th percentile of all CPUs.

In this game, the CPU's influence is most evident at lower resolutions and lower quality presets. At 1080p Low, the 181.2 FPS average is significantly higher than the 4K Low result of 108.9 FPS, but the fact that it does not exceed 200 FPS suggests that the CPU is a bottleneck. The 3DMark 16-thread score of 9075 and the single-thread score of 941 indicate that while the 5900X is capable, it does have limits that become apparent in high-frame-rate scenarios. The data shows that at 1080p High, the frame rate of 113.1 FPS is lower than the 1440p Medium result of 116.3 FPS, which is counterintuitive and points to CPU overhead at lower resolutions where the GPU is underutilized.

The CPU's nearest rivals, such as the Intel Core i7-13700 with an average score of 39857 and a deltaPct of -1, and the AMD Ryzen 7 PRO 8845HS with a score of 39747 and a deltaPct of -0.7, show that the 5900X is slightly behind in aggregate benchmarks. However, in Flight Simulator, the 12-core configuration provides ample headroom for background tasks, and the boost clock of 4.80 GHz helps maintain responsiveness in the simulation loop. The CPU's memory support for DDR4 with a bandwidth of 51.2 GB/s may be a limiting factor compared to newer platforms, but it does not appear to significantly hamper the measured frame rates.

How This Combo Ranks

Within the benchmark database, this specific combination of the AMD Ryzen 9 5900X and AMD Radeon RX 7900 XTX achieves a rank of 258 out of 1795 tested combos for Microsoft Flight Simulator. This places the system in the top 14.4% of all configurations, which is a strong showing given the diversity of hardware tested. The rank reflects the balance between the CPU's strong multi-threaded capabilities and the GPU's high-end rasterization performance, which together deliver playable frame rates even at 4K Ultra with an average of 60.1 FPS.

The combo's ranking is likely influenced by the fact that Flight Simulator is not purely GPU-bound, as the simulation's CPU demands can often limit performance. The 5900X's percentile of 90 against all CPUs, combined with the 7900 XTX's percentile of 85 against all GPUs, suggests that neither component is a weak link, but the overall rank of 258 indicates that there are faster combinations available, particularly those with newer CPUs that offer higher single-thread performance. The data shows that at 1080p, the combo can achieve 181.2 FPS at Low settings, which is excellent for competitive play, but at 4K Ultra, the 60.1 FPS average is just at the threshold of smoothness, indicating that the GPU is the limiting factor at that resolution.

FAQ

Q: What is the highest average frame rate achievable with this combo in Microsoft Flight Simulator?

A: The highest measured average frame rate is 181.2 FPS, achieved at 1920x1080 resolution with Low settings.

Q: How does the combo perform at 4K Ultra settings?

A: At 3840x2160 with Ultra settings, the combo delivers an average frame rate of 60.1 FPS, which is the lowest measured result across all tested configurations.

Q: Is the CPU or GPU the primary bottleneck at 1080p Low?

A: At 1080p Low, the average frame rate of 181.2 FPS suggests the CPU is the limiting component, as the GPU has ample headroom to render more frames if the CPU could supply them.

Q: What is the combo's rank compared to other tested systems?

A: The combo ranks 258 out of 1795 tested configurations, placing it in the top 14.4% of all systems tested for Microsoft Flight Simulator.

Q: How much does performance drop from 1080p to 4K at High settings?

A: At High settings, the average frame rate drops from 113.1 FPS at 1080p to 67.7 FPS at 4K, a total reduction of 45.4 FPS.

Q: Does the GPU's memory capacity of 24 GB affect performance in this game?

A: The 24 GB GDDR6 memory with a 960.0 GB/s bandwidth is sufficient for the game's large textures, but the data does not show a direct correlation between memory size and frame rate, as the GPU's compute and pixel throughput are more significant factors at higher resolutions.