Microsoft Flight Simulator

Microsoft Flight Simulator with an Intel Core i5-9400 and AMD Radeon RX 7600 produces a playable but constrained experience, with the data clearly showing that the GPU becomes the primary bottleneck as resolution and settings increase. The combo ranks in the 32nd percentile (2527 out of 3714 tested combos), indicating a mid-tier pairing that struggles to maintain high frame rates at demanding configurations. The measured FPS tells a consistent story: the system scales predictably from 1080p to 4K, but the RX 7600's 8 GB VRAM and the i5-9400's six-core architecture limit performance in this simulation-heavy title.

Resolution Scaling

The FPS drop from 1080p to 4K is substantial and reveals a GPU-bound system at higher resolutions. At Low settings, the average frame rate falls from 101 FPS at 1920x1080 to 60 FPS at 3840x2160 — a 41% reduction that shows the GPU is doing the heavy lifting. The scaling is even more pronounced at Medium settings, where performance drops from 79 FPS at 1080p to 47 FPS at 4K (a 40% loss), and at High settings, where it falls from 59 FPS to 35 FPS (a 41% loss). This consistent ~40% penalty across settings strongly indicates that the Radeon RX 7600 is the limiting component at 4K, as the CPU workload remains relatively constant while pixel throughput demands more from the GPU.

At 1440p, the picture is more balanced. The RX 7600 delivers 81 FPS at Low, 63 FPS at Medium, and 48 FPS at High settings — all playable numbers that suggest the GPU still has headroom. The jump from 1440p to 4K at High settings (48 to 35 FPS) represents a 27% drop, which is less severe than the 1080p-to-1440p transition at the same settings (59 to 48 FPS, a 19% drop). This non-linear scaling hints that the CPU begins to matter more at lower resolutions, where the frame rate is higher and the i5-9400's six threads become a factor. The data shows that 1080p Low is the only configuration where the CPU might bottleneck, with 101 FPS pushing the Core i5-9400 closer to its limits.

For a flight simulator, the 4K Ultra result of 33 FPS is the weakest point, while 1080p Ultra at 56 FPS is the most demanding playable setting. The gap between Low and Ultra at each resolution is significant — at 1080p, the spread is 45 FPS (101 to 56), while at 4K it narrows to 27 FPS (60 to 33). This narrowing suggests that at 4K, even Low settings strain the GPU, leaving little room for graphical fidelity improvements without sacrificing frame rate.

FAQ

Q: Is the Intel Core i5-9400 + AMD Radeon RX 7600 combo sufficient for 4K gaming in Microsoft Flight Simulator?

A: The data shows 4K performance is marginal. Average FPS ranges from 60 at Low to 33 at Ultra, with High settings at 35 FPS. For smooth gameplay, 4K is only viable at Low or Medium settings, where the 47 FPS average at Medium with a minimum of 40 FPS is borderline acceptable.

Q: What is the best resolution/settings balance for this combo?

A: 1440p Medium (63 FPS average, 54 min) or 1440p High (48 FPS) offer the best balance of visual quality and playability. 1080p Medium (79 FPS) is also strong, but higher resolutions provide more detail for a flight simulator where spotting terrain and airports matters.

Q: How does the RX 7600 compare to its closest rivals in this game?

A: Based on average benchmark scores, the RX 7600 (15171) is nearly identical to the NVIDIA GeForce RTX 3050 OEM (15199, -0.2% delta) and slightly ahead of the AMD Radeon Pro 560X (15082, +0.6%) and AMD Radeon 680M (15270, -0.7%). This suggests similar GPUs will perform comparably in this title.

Q: Does the CPU bottleneck the GPU in this game?

A: At 1080p Low (101 FPS) and 1440p Low (81 FPS), the i5-9400's six cores may limit the RX 7600, as the GPU has more headroom at lower resolutions. At 4K, the GPU is clearly the bottleneck with FPS dropping below 60 across all settings. The CPU's Cinebench R23 multi-core score of 6629 (47th percentile) is adequate but not exceptional for this simulation.

Q: What is the expected FPS at Ultra settings across resolutions?

A: Ultra settings yield 56 FPS at 1080p, 45 FPS at 1440p, and 33 FPS at 4K. The 4K result is unplayable for most users, while 1080p Ultra is borderline and 1440p Ultra is marginal. The data suggests Ultra is only recommended at 1080p for this combo.

Q: How does the combo rank against all tested configurations?

A: The combo ranks 2527 out of 3714 total combos (32nd percentile). This places it in the lower-middle tier, meaning roughly two-thirds of tested CPU/GPU combinations deliver better performance in Microsoft Flight Simulator, though many would also cost more.

CPU Role

The Intel Core i5-9400 is a six-core, six-thread processor from the Coffee Lake architecture, running at a 2.90 GHz base clock and 4.10 GHz boost. It has 9 MB of shared L3 cache and supports DDR4 memory with dual-channel bandwidth of 42.7 GB/s. In synthetic benchmarks, it scores 6629 in Cinebench R23 multi-core and 935 in single-core, with a Geekbench multi-core score of 5141. These numbers place it in the 47th percentile of all CPUs, meaning it sits near the middle of the pack — adequate for gaming but not a high-end part.

In Microsoft Flight Simulator, the CPU's role is most evident at lower resolutions. At 1080p Low, the combo achieves 101 FPS, but this drops to 81 FPS at 1440p Low and 60 FPS at 4K Low. The scaling from 1440p to 4K (81 to 60, a 26% drop) is less severe than from 1080p to 1440p (101 to 81, a 20% drop), which suggests the CPU is keeping up with the GPU's demands at lower pixel counts. However, the six-thread limitation becomes apparent in a simulation game that often requires more threads for AI, physics, and world streaming. The CPU's nearest rival, the Intel Core i7-10710U, scores nearly identically (2248 vs 2246 average), indicating that the i5-9400's performance is typical for its class.

The 65W TDP and Socket 1151 compatibility make it an accessible chip, but its end-of-life status means no future upgrades on the same platform. The lack of hyper-threading is a potential weakness in a game like Microsoft Flight Simulator, which is known for heavy CPU utilization during complex scenes. Benchmarks show the CPU's average score is 2254, with the nearest rival being the Intel Core i7-1068NG7 at 2259 (-0.2% delta), confirming that this CPU is firmly mid-range. For this game, the data implies that while the CPU won't bottleneck at 4K, it may prevent the GPU from reaching its full potential at 1080p.

How This Combo Ranks

The combo ranks 2527 out of 3714 tested combinations, placing it in the 32nd percentile of all CPU/GPU pairings evaluated in Microsoft Flight Simulator. This is a below-average result, indicating that most tested systems outperform this pairing. However, the rank should be interpreted in context: the benchmark database includes high-end configurations with flagship CPUs and GPUs, so a 32nd percentile score is not necessarily poor for a mid-range build. The data suggests that this combo is positioned for 1080p and 1440p gaming rather than 4K.

Compared to the CPU's individual percentile (47th) and the GPU's percentile (57th), the combo rank is lower, which implies that the pairing may not be optimal for this specific game. The RX 7600's 57th percentile among GPUs is respectable, but the i5-9400's 47th percentile drags the overall performance down, particularly in a CPU-intensive title like a flight simulator. The gap between the combo rank (32nd percentile) and the GPU's rank (57th) suggests that the CPU is holding back the system's potential in this game more than in other titles.

The GPU's nearest rival, the RTX 3050 OEM, has virtually identical performance (15199 vs 15171 average, -0.2% delta), so swapping the GPU would not significantly change the ranking. Similarly, the CPU's nearest rivals score within 0.4% of the i5-9400, meaning the combo's rank is representative of a broad mid-range tier. For users comparing systems, this rank provides a clear benchmark: expect better performance from roughly 68% of tested combos, but this pairing remains viable for moderate settings and resolutions.

GPU Role

The AMD Radeon RX 7600 is a RDNA 3.0 architecture GPU with 8 GB of GDDR6 memory on a 128-bit bus, delivering 288.0 GB/s of bandwidth. It has 2048 shading units, 128 TMUs, and 64 ROPs, with a boost clock of 2655 MHz and a game clock of 2250 MHz. Its compute power is rated at 21.75 TFLOPS FP32, and it supports DirectX 12 Ultimate, Vulkan 1.4, and OpenGL 4.6. In synthetic benchmarks, it scores 16634 in Passmark G3D and 88051 in Geekbench OpenCL, placing it in the 57th percentile of all GPUs.

In Microsoft Flight Simulator, the GPU's 8 GB VRAM is a critical factor. At 4K Ultra settings, the average FPS drops to 33, and the 8 GB frame buffer likely causes texture thrashing in a game known for high-resolution terrain and aircraft textures. The measured data shows a clear VRAM-related ceiling: at 4K, even Low settings only achieve 60 FPS, and Medium (47 FPS) to Ultra (33 FPS) scaling is steep. This indicates that the GPU's memory bandwidth (288 GB/s) is insufficient for 4K Ultra in this simulator, where large draw distances and detailed scenery demand both capacity and bandwidth.

The RX 7600's nearest rivals include the RTX 3050 OEM (15199, -0.2% delta) and the AMD Radeon 680M (15270, -0.7%), which suggests the GPU is competitive with entry-level RTX 30-series and high-end integrated graphics. However, the 8 GB VRAM is a limitation for Microsoft Flight Simulator at 4K, as the game can easily exceed 8 GB with high-resolution texture packs. At 1440p High (48 FPS) and 1080p High (59 FPS), the GPU performs adequately, but the data shows that pushing beyond these settings yields diminishing returns. The GPU's 165W TDP and dual-slot cooler make it a manageable card for most systems, and its PCIe 4.0 x8 interface is sufficient for this game's data throughput.

Measured FPS Breakdown

The measured FPS data provides a comprehensive view of performance across three resolutions and four settings levels. At 1920x1080, the combo delivers 101 FPS at Low, 79 FPS at Medium (min 67, max 90), 59 FPS at High, and 56 FPS at Ultra. This shows that 1080p is where the system is most comfortable, with even Ultra settings maintaining playable frame rates. The gap between Medium and High (20 FPS) is larger than between High and Ultra (3 FPS), suggesting that High settings are a sweet spot for visual fidelity versus performance.

At 2560x1440, performance drops to 81 FPS at Low, 63 FPS at Medium (min 54, max 73), 48 FPS at High, and 45 FPS at Ultra. The 1440p results are more evenly spaced, with a 18 FPS difference between Low and Medium, 15 FPS between Medium and High, and only 3 FPS between High and Ultra. This indicates that Ultra settings at 1440p provide minimal visual benefit over High for this GPU, making High the recommended setting for 1440p gaming. The minimum FPS of 54 at Medium suggests that even the lowest dips remain playable at this resolution.

At 3840x2160, the system struggles: 60 FPS at Low, 47 FPS at Medium (min 40, max 54), 35 FPS at High, and 33 FPS at Ultra. The 4K results show that only Low settings achieve a consistent 60 FPS, while Medium is borderline (47 average with 40 minimum). High and Ultra settings are below 35 FPS, which is generally considered unplayable for a flight simulator where smooth panning is essential. The step from 1440p to 4K at High settings (48 to 35 FPS) represents a 27% loss, while the 1080p-to-1440p drop at High (59 to 48 FPS) is 19%, confirming that the GPU is the limiting factor at 4K. Overall, the measured data supports a recommendation of 1080p High/Ultra or 1440p Medium/High for the best balance of performance and visuals.