Microsoft Flight Simulator

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 7 5800X3D brings 8 cores and 16 threads to the simulation, with a base clock of 3.40 GHz and a boost clock of 4.50 GHz. This is a Zen 3 Vermeer part built on TSMC's 7 nm process, and its defining feature is the 96 MB shared L3 cache — an unusually large pool that matters for a game like Microsoft Flight Simulator, which streams terrain and scenery data continuously. The CPU's 3dmark scores show a strong single-thread foundation: 884 in the single-thread test and 1746 in the 2-thread test. That single-thread strength is critical here because the flight simulator's core simulation loop — physics, flight model, weather — tends to run on one or two primary threads. The 16-thread score of 7299 and max-thread score of 7285 are nearly identical, indicating that beyond 16 threads, there's no additional headroom. For this game, that's fine: the simulation doesn't scale linearly across all cores, and the extra L3 cache helps keep frequently accessed data close to the cores, reducing memory latency stalls.

The 5800X3D's Cinebench R23 multicore score of 14317 and single-core score of 1452 put it in a competitive position for a 2022-era desktop chip. Its PassMark multithread score of 28309 and single-thread score of 3234 reinforce the picture: this is a CPU that handles both lightly threaded and heavily threaded workloads without a dramatic drop-off. In Microsoft Flight Simulator, the practical effect is that the CPU can feed the GPU with draw calls and simulation state without becoming the bottleneck at lower resolutions. At 1080p with Low settings, the measured average FPS is 158, which is far above what a weaker CPU could sustain — that number indicates the processor is keeping up with the frame generation pipeline even when the GPU has relatively little work to do. The 3dmark 4-thread score of 3392 and 8-thread score of 5906 show a healthy scaling pattern, but the flight sim's reliance on high-frequency single-thread performance means the 884 single-thread score is arguably the most relevant metric for understanding why frame rates stay high even in complex scenery.

The CPU's memory bandwidth of 51.2 GB/s over dual-channel DDR4 is modest by modern standards, but the 96 MB L3 cache compensates by serving as a large intermediary buffer. This is particularly relevant for a game that loads and discards assets as you fly across regions. The 5800X3D's nearest rivals in average benchmark score — the AMD Ryzen 7 6800U (delta 0%), Intel Core i9-10900K (delta 0.1%), and AMD Ryzen AI 5 PRO 340 (delta -0.1%) — all sit within a fraction of a percent in aggregate performance. However, the 5800X3D's cache design gives it an edge in cache-sensitive workloads, and flight simulation is exactly that kind of workload. The Cinebench R15 single-core score of 241 and multicore of 2413 further confirm that the chip's per-core performance is solid, which translates directly into stable frame pacing in the game's CPU-bound scenarios.

How This Combo Ranks

The combination of the AMD Ryzen 7 5800X3D and NVIDIA GeForce RTX 3080 ranks 1036 out of 3714 tested combos in Microsoft Flight Simulator. That places it in the 72nd percentile of all tested pairings — a strong result, but not top-tier, which makes sense given that the RTX 3080 is a 2020-era GPU and the 5800X3D is a 2022-era CPU. The ranking reflects that this combo sits comfortably above the median but is not competing with the absolute fastest pairings, which would typically include newer GPUs with more VRAM and higher memory bandwidth. The data shows a balanced system: the CPU is not holding the GPU back at higher resolutions, and the GPU is not so weak that it drags the CPU down at lower resolutions.

The combo's rank is particularly notable because the RTX 3080's individual GPU percentile is 68, while the 5800X3D's CPU percentile is 80. The system's overall ranking at 1036/3714 suggests that the CPU is doing more work to boost the combo than the GPU alone would suggest. This is consistent with the game's profile: flight simulators are often CPU-limited, especially in scenarios with dense scenery or complex weather. The GPU's average benchmark score of 23172 and the CPU's average of 27896 both contribute to the pairing, but the CPU's higher relative standing means it's the component that's more likely to be the differentiator between a mediocre and a good experience in this specific game.

Comparatively, the RTX 3080's nearest GPU rivals in average score — the NVIDIA P106-100 (delta -0.3%), AMD Radeon Pro Vega 16 (delta -0.3%), and AMD Radeon RX 6600M (delta -0.4%) — are all within a rounding error of the 3080's performance. This indicates that the GPU's raw compute is well understood, and the 3080's advantages come from its memory subsystem and driver optimization rather than sheer compute throughput. For Microsoft Flight Simulator, the 10 GB of GDDR6X memory and 760.3 GB/s bandwidth are the key attributes, and the combo ranking reflects that the pair works well together without obvious imbalance.

Resolution Scaling

The measured FPS data shows a clear pattern as resolution increases from 1920x1080 to 3840x2160. At Low settings, the average FPS drops from 158 at 1080p to 127 at 1440p, then to 94 at 4K. That's a 40% drop from 1080p to 4K at Low settings. At High settings, the drop is from 92 at 1080p to 74 at 1440p, then to 55 at 4K — a 40% reduction as well. Medium settings show 123 at 1080p, 99 at 1440p, and 73 at 4K, which is a 41% drop. Ultra settings are the most demanding: 88 at 1080p, 71 at 1440p, and 52 at 4K, a 41% reduction. The consistency of these percentage drops across all settings presets tells a clear story: the limiting factor at higher resolutions is the GPU, not the CPU.

The fact that the CPU maintains high frame rates at 1080p Low (158 FPS) and 1080p Medium (123 FPS) indicates that the 5800X3D is not the bottleneck at lower resolutions. As resolution scales up, the GPU takes on more rendering work, and the FPS drops proportionally. The RTX 3080's 10 GB VRAM and 320-bit memory bus are sufficient for 4K in this game, but the average FPS at 4K Ultra (52) is close to the edge of playability. The data suggests that the CPU's role diminishes as resolution increases — the gap between 1080p and 1440p is smaller than the gap between 1440p and 4K for most settings, indicating that the GPU's fill rate and bandwidth become the dominant constraints at higher pixel counts.

The min and max FPS data available for Medium settings further illustrate this. At 4K Medium, the range is 62 to 84 FPS, a 22 FPS spread. At 1440p Medium, the range is 84 to 114, a 30 FPS spread. At 1080p Medium, it's 104 to 141, a 37 FPS spread. The narrowing range at higher resolutions suggests that the GPU is consistently saturated, making frame times more uniform. At lower resolutions, the CPU's variable load creates more frame time variance, but the average FPS is high enough that this variance is less noticeable.

Measured FPS Breakdown

At 1920x1080, the results are as follows: Low settings average 158 FPS, Medium averages 123 FPS with a range of 104 to 141, High averages 92 FPS, and Ultra averages 88 FPS. The step from Low to Medium is a 35 FPS drop — a 22% reduction. The step from Medium to High is a 31 FPS drop, a 25% reduction. The step from High to Ultra is only 4 FPS, a 4% reduction. This indicates that the High preset is already hitting a CPU or GPU ceiling at 1080p, and Ultra adds little extra load that the system can't handle. The 158 FPS at Low is well above what a 60 Hz or even 144 Hz display needs, so there's headroom for users who want to crank settings without sacrificing smoothness.

At 2560x1440, Low averages 127 FPS, Medium averages 99 FPS with a range of 84 to 114, High averages 74 FPS, and Ultra averages 71 FPS. The drop from Low to Medium is 28 FPS (22%), Medium to High is 25 FPS (25%), and High to Ultra is 3 FPS (4%). The pattern mirrors 1080p, with the High-to-Ultra gap being minimal. The 1440p Low result of 127 FPS is still very playable, and even 1440p Ultra at 71 FPS is smooth for a flight sim, which typically doesn't require the 100+ FPS that competitive shooters demand.

At 3840x2160, Low averages 94 FPS, Medium averages 73 FPS with a range of 62 to 84, High averages 55 FPS, and Ultra averages 52 FPS. The drop from Low to Medium is 21 FPS (22%), Medium to High is 18 FPS (25%), and High to Ultra is 3 FPS (6%). The 4K Low result of 94 FPS is solid, but 4K Medium at 73 FPS is the practical sweet spot for visual quality. 4K High at 55 FPS is on the edge of smoothness, and 4K Ultra at 52 FPS is borderline for a game where you're often looking at distant terrain and want stable frame pacing. The min FPS at 4K Medium is 62, which is still above 60 — a good sign for consistency.

GPU Role

The NVIDIA GeForce RTX 3080 is built on the Ampere architecture with the GA102 chip, fabricated on Samsung's 8 nm process. It has 8704 shading units, 272 texture mapping units, and 96 ROPs, along with 68 RT cores and 272 tensor cores. The GPU's boost clock is 1710 MHz with a base clock of 1440 MHz. The memory configuration is 10 GB of GDDR6X on a 320-bit bus, delivering 760.3 GB/s of bandwidth. This memory bandwidth is the critical factor for Microsoft Flight Simulator, which loads high-resolution textures for terrain, aircraft, and airports. The 10 GB capacity is adequate for 4K in this game, but the measured FPS at 4K Ultra (52) suggests that the GPU is working hard to fill all those pixels.

The GPU's PassMark G3D score of 25086 and its 3DMark Steel Nomad DX12 score of 4407 place it in the 68th percentile of all GPUs. Its nearest rivals in average benchmark score are within 0.4% of its performance, which underscores that the 3080's position is well-established. In this game, the GPU's role becomes more pronounced at higher resolutions and higher settings. At 1080p Low, the GPU is not the bottleneck — the CPU is feeding frames faster than the GPU needs to render them. At 4K Ultra, the GPU is clearly the limiting factor, with the average FPS dropping to 52.

The RTX 3080's FP32 performance of 29.77 TFLOPS and texture rate of 465.1 GTexel/s are strong on paper, but the game's real-world performance is bound by memory bandwidth and pixel fill rate. The pixel rate of 164.2 GPixel/s is sufficient for 4K at moderate settings, but the 52 FPS at Ultra suggests that the GPU's shading units are being pushed to their limit. The GPU's 12-pin power connector and 320 W TDP indicate that it's a power-hungry part, but the measured data doesn't show thermal throttling — the frame rates are consistent across the settings ladder.

The GPU's 68 RT cores are not heavily utilized in this flight simulator, which doesn't rely on ray-traced effects to the same degree as some other titles. Instead, the GPU's rasterization performance and memory bandwidth are the key attributes. The 10 GB VRAM is a consideration for 4K texture streaming — the game can use more than 10 GB if all texture detail is set to maximum, but the measured results suggest that the 3080 manages within its capacity without dropping to unplayable levels.

Settings Recommendations

For the best experience per the measured rows, the Medium preset offers the most balanced performance across all three resolutions. At 1080p, Medium delivers 123 FPS with a min of 104 and max of 141 — this is smooth, with no risk of frame drops below 100 FPS. At 1440p, Medium averages 99 FPS with a min of 84, which is above the 60 FPS threshold and provides a comfortable margin for complex scenery. At 4K, Medium averages 73 FPS with a min of 62, which is just above 60 FPS and should feel fluid for most players. The Medium preset appears to be the point where the CPU and GPU are both reasonably utilized without either becoming a hard bottleneck.

The High preset is a step down in performance but a step up in visual fidelity. At 1080p, High averages 92 FPS, which is still very playable. At 1440p, High averages 74 FPS, which is acceptable. At 4K, High averages 55 FPS, which is borderline — the frame rate is above 30, but it may feel less smooth during rapid camera movements or when flying over detailed urban areas. The Ultra preset offers only a 3-6 FPS improvement over High in terms of the gap from High to Ultra is consistently small, meaning you're paying a performance cost for minimal visual gain. At 4K Ultra, the 52 FPS average is below the 60 FPS target, and the lack of min FPS data for Ultra suggests that the system might be less consistent.

For users with a 60 Hz display, the 4K Medium setting at 73 FPS is the recommended choice — it provides headroom above 60 FPS and the min of 62 ensures that you won't dip below your refresh rate in most scenarios. For 1440p display owners, Medium at 99 FPS is excellent, but High at 74 FPS is also viable if you prioritize visuals over frame rate. For 1080p, High at 92 FPS is a good balance, and even Ultra at 88 FPS is playable — the 4 FPS difference between High and Ultra at 1080p means you can enable Ultra without a significant penalty.

The Low preset is only recommended if you're pursuing extremely high frame rates (158 FPS at 1080p) or if you're running on a system with a high refresh rate monitor and want to maximize smoothness. However, the visual quality drop from Low to Medium is significant, and the performance gain from Low to Medium (123 to 158 at 1080p) is not as large as the visual gain. The data supports Medium as the default recommendation, with High as the choice for users who prioritize visual detail and have a 1080p or 1440p display. For 4K, Medium is the clear pick — the step to High costs 18 FPS, which is a 25% reduction, and the visual improvement may not justify the frame rate loss in a game where smoothness matters for immersion.