Microsoft Flight Simulator

Resolution Scaling

The measured frame rates for Microsoft Flight Simulator with the Intel Core i5-12400 and AMD Radeon RX 580 show a clear pattern of GPU-bound scaling as resolution increases. At 1080p with Low settings, the combination produces 53.8 FPS, but this drops to 44.2 FPS at 1440p and 33.8 FPS at 4K. That represents a 37% reduction from 1080p to 4K on Low settings, indicating the GPU is the primary bottleneck even at the lowest quality preset.

The scaling becomes more severe at higher quality settings. At High settings, the system delivers 28.6 FPS at 1080p, 23.5 FPS at 1440p, and 16.8 FPS at 4K. The 4K figure is only 59% of the 1080p result, showing that the RX 580's memory bandwidth and pixel throughput are increasingly strained as pixel count rises. The Ultra preset tells a similar story: 30.9 FPS at 1080p falls to 23.5 FPS at 1440p and 15.2 FPS at 4K.

Interestingly, the gap between Medium and High is relatively modest at each resolution. At 1440p, Medium produces 34.9 FPS while High produces 23.5 FPS — a difference of 11.4 FPS. At 4K, the same preset step costs 8.2 FPS (25.0 to 16.8). This suggests that the quality jump from Medium to High introduces rendering features that disproportionately tax the Polaris 20 chip, likely related to shadow complexity and terrain detail. The data indicates that users targeting 4K should expect playable results only on Low settings, where the 33.8 FPS figure approaches a playable threshold but remains below the 60 FPS ideal for flight simulation.

GPU Role

The AMD Radeon RX 580 sits at the 53rd percentile among all GPUs in the benchmark database, with an average benchmark score of 13559. Its nearest rivals include the NVIDIA GeForce GTX 570 (0% delta), the NVIDIA GeForce GTX 950 (0.1% faster), and the AMD Radeon Pro 455 (1.1% faster). This places the RX 580 in a crowded mid-range tier, which aligns with its measured performance in Flight Simulator.

The card carries 8 GB of GDDR5 memory across a 256-bit bus, yielding 256.0 GB/s of bandwidth. In a flight simulator that streams terrain and photogrammetry data, this bandwidth becomes a critical resource. The 4K results show why: at Ultra settings, the average FPS collapses to 15.2, and even High settings only reach 16.8 FPS. The GPU's 6.175 TFLOPS of FP32 performance and 42.88 GPixel/s pixel rate are simply insufficient for the pixel workload at 3840x2160 with high-quality textures.

Clock behavior is another factor. The RX 580 operates at a base clock of 1257 MHz and a boost clock of 1340 MHz, with memory running at 2000 MHz (8 Gbps effective). These clocks are modest by modern standards, and the 14 nm process node from GlobalFoundries means the chip generates significant heat relative to its performance. The 185 W TDP and dual-slot cooler with a single 8-pin power connector suggest the card is running near its thermal and power limits during demanding scenes. The benchmark data shows that the GPU's DirectX 12 score of 43 in PassMark is notably lower than its DirectX 11 score of 60, which may explain why Flight Simulator — a title that leverages DX12 features — performs below what the raw G3D score of 8813 might suggest.

Settings Recommendations

The measured FPS rows provide a clear hierarchy for optimizing the experience. At 1080p, Low settings deliver 53.8 FPS, which is the only preset that approaches a smooth 60 FPS target. Medium settings drop to 44.7 FPS, High to 28.6 FPS, and Ultra to 30.9 FPS. Notably, Ultra at 1080p outperforms High at 1080p by 2.3 FPS, which is an anomaly that likely reflects measurement variance or specific scene complexity differences between runs.

For 1440p users, Low settings provide 44.2 FPS, which is the most playable option at that resolution. Medium yields 34.9 FPS, while both High and Ultra produce identical results at 23.5 FPS. This plateau suggests that beyond Medium, the GPU becomes the limiting factor regardless of additional quality features — spending extra GPU resources on Ultra settings yields no measurable frame rate benefit when the card is already saturated.

At 4K, Low settings produce 33.8 FPS, Medium drops to 25.0 FPS, and High/Ultra fall to 16.8 and 15.2 FPS respectively. The data strongly recommends 1080p Low or Medium for a playable experience, with 1440p Low as an alternative if image clarity is prioritized over frame rate. The 4K resolution should be reserved for static viewing or low-detail flight planning, as even the best-case 33.8 FPS result is below the smoothness threshold for a simulator that benefits from responsive camera control.

FAQ

Q: Can this system run Microsoft Flight Simulator at 4K?

A: Yes, but only on Low settings, where it produces 33.8 FPS. Medium settings drop to 25.0 FPS, High to 16.8 FPS, and Ultra to 15.2 FPS, making those presets impractical for smooth flight simulation at 3840x2160.

Q: What is the best preset for 1080p gaming?

A: Low settings deliver 53.8 FPS at 1920x1080, which is the highest frame rate of any measured configuration. Medium settings yield 44.7 FPS, offering a compromise between visual quality and smoothness. High and Ultra provide 28.6 and 30.9 FPS respectively.

Q: How does the RX 580 compare to its nearest GPU rivals?

A: The RX 580's average benchmark score of 13559 places it within 0.1% of the NVIDIA GeForce GTX 570 and 0.1% behind the NVIDIA GeForce GTX 950. It is 1.1% faster than the AMD Radeon Pro 455 and 1.1% slower than the NVIDIA P106-090.

Q: Is the CPU or GPU the limiting factor in this game?

A: The resolution scaling data shows the GPU is the primary bottleneck. Dropping from 1080p to 4K on Low settings reduces FPS by 37%, and the CPU's 3DMark single-thread score of 910 and multithread score of 5890 indicate ample processing headroom for the simulation's physics and weather systems.

Q: Why does Ultra perform similarly to High at 1440p?

A: Both High and Ultra presets produce 23.5 FPS at 2560x1440. This identical result indicates the GPU has reached its rendering ceiling, and additional quality settings beyond High do not impact the frame rate because the card is fully utilized.

Q: What memory capacity does the RX 580 have, and does it matter?

A: The card has 8 GB of GDDR5 memory on a 256-bit bus with 256.0 GB/s bandwidth. While 8 GB is sufficient for texture storage, the bandwidth appears to be a limiting factor at 4K resolution, where frame rates drop dramatically even at Low settings.

CPU Role

The Intel Core i5-12400 is a 6-core, 12-thread processor from the Alder Lake architecture, built on Intel's 10 nm process. Its base clock of 2.50 GHz and boost clock of 4.40 GHz provide strong single-thread performance, as evidenced by a 3DMark single-thread score of 910 and a Cinebench R23 single-core score of 2249. In Flight Simulator, single-thread performance is critical for the main simulation loop that handles aircraft physics, flight systems, and AI traffic.

The CPU's multithreaded capabilities are equally robust for a 6-core part. The Cinebench R23 multicore score of 15935 and PassMark multithread score of 18747 show that the i5-12400 can handle background terrain loading and scenery streaming without starving the main thread. The 18 MB of shared L3 cache and 1.25 MB L2 cache per core help maintain data locality for the large world-data structures that Flight Simulator frequently accesses.

The i5-12400 ranks at the 77th percentile among all CPUs, with an average benchmark score of 19850. Its nearest rivals include the Intel Core i7-9700 (0.1% faster), the Intel Core i7-8700 (0.2% faster), and the AMD Ryzen Threadripper PRO 5995WX (0.4% faster). This clustering shows that the i5-12400 delivers performance comparable to older mainstream i7 parts, which is notable because Flight Simulator's CPU demands are substantial but not extreme.

The measured FPS data confirms that the CPU is not the limiting factor in this combination. At 1080p Low, the system achieves 53.8 FPS, and the scaling from Low to Ultra at 1080p (53.8 to 30.9 FPS) tracks closely with GPU workload increases rather than CPU stalls. The 65 W TDP and 163 mm² die size indicate a power-efficient design that maintains consistent boost behavior during extended flights. The processor supports DDR4 and DDR5 memory in dual-channel mode, which allows flexibility for system builders, though the benchmark results do not differentiate between memory types. The i5-12400's integrated UHD Graphics 730 is irrelevant for gaming when a discrete GPU is present, but its presence adds flexibility for troubleshooting or secondary display output.