Microsoft Flight Simulator

Microsoft Flight Simulator with the Intel Core Ultra 7 265HX and NVIDIA GeForce RTX 4090 Mobile is a top-tier combination that delivers playable frame rates at 4K, but the data reveals a clear shift in bottleneck behavior as resolution increases. The system ranks in the top 22% of all tested combinations (rank 815 out of 3714), placing it firmly in enthusiast territory. However, the measured FPS curve shows that while 1080p performance is exceptionally high, the transition to 4K introduces a significant performance penalty that points to the GPU becoming the primary limiting factor at higher resolutions.

Resolution Scaling

The frame rate drop from 1080p to 4K is substantial and tells a clear story about where the performance ceiling lies. At Low settings, the average FPS falls from 166 at 1920x1080 to 98 at 3840x2160, a reduction of 68 FPS or roughly 41%. This is a massive scaling penalty that indicates the RTX 4090 Mobile is being pushed to its limits at 4K, even with the least demanding preset. The gap between 1080p and 1440p is smaller (166 to 133 FPS, a 33 FPS drop), but the jump from 1440p to 4K (133 to 98 FPS, a 35 FPS drop) shows that the pixel count increase is the dominant factor.

At Ultra settings, the pattern is similar but with lower absolute numbers. The system delivers 92 FPS at 1080p, drops to 74 FPS at 1440p, and reaches 55 FPS at 4K. The percentage drop from 1080p to 4K at Ultra is approximately 40%, nearly identical to the Low preset scaling. This consistency across presets suggests that the GPU is the limiting component at 4K regardless of how much graphical load is applied. The CPU, with its 20 cores and 20 threads, has enough headroom to feed the GPU at lower resolutions, but at 4K the rendering workload becomes the bottleneck.

What is particularly telling is the Medium preset data, which is the only preset with min and max FPS values recorded. At 4K Medium, the average is 77 FPS with a minimum of 65 and maximum of 88. At 1440p Medium, the average rises to 104 FPS (min 88, max 119), and at 1080p Medium, it reaches 129 FPS (min 109, max 148). The min-to-max spread narrows as resolution increases, indicating that the GPU's frame time consistency improves when it is more heavily loaded. This is a classic sign of a GPU-bound scenario — the processor has spare capacity, and the graphics card is working at near-full utilization.

FAQ

Q: What is the best resolution for this combo to maintain a 60 FPS average?

A: The data shows that 4K Ultra delivers 55 FPS average, which is below the 60 FPS target. However, 4K High achieves 58 FPS, and 4K Medium reaches 77 FPS. For a consistent 60+ FPS experience at 4K, Medium settings are the safe choice, while High is borderline.

Q: How much performance is lost when moving from 1080p to 4K at High settings?

A: At High settings, the average FPS drops from 97 at 1920x1080 to 78 at 2560x1440, and further to 58 at 3840x2160. The total reduction from 1080p to 4K is 39 FPS, which represents a 40% decrease in frame rate.

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

A: The data suggests the CPU has significant headroom at 1080p. With Low settings producing 166 FPS average, the Intel Core Ultra 7 265HX, with its 20 cores and 20 threads, is clearly not the limiting factor. The GPU handles the load well at this resolution, and the frame rate is high enough to suggest either component could be near its limit.

Q: What is the minimum FPS recorded for this combination?

A: The only minimum FPS values recorded are for Medium settings. At 4K Medium, the minimum is 65 FPS; at 1440p Medium, it is 88 FPS; and at 1080p Medium, it is 109 FPS. No min FPS data is available for Low, High, or Ultra presets.

Q: How does this combo rank among all tested systems?

A: The combo ranks 815 out of 3714 tested combinations, placing it in the 78th percentile. This is a strong showing, but not the absolute top, indicating that other CPU and GPU pairings can outperform it in this specific title.

Q: Does the RTX 4090 Mobile's performance align with its benchmark scores?

A: The GPU's Passmark G3D score is 27212, with a percentile rank of 84 among all GPUs. In this game, the measured FPS at 4K High (58 FPS) is consistent with a high-end mobile GPU, but the 4K Ultra result of 55 FPS shows that even this hardware struggles with maximum settings at the highest resolution.

Settings Recommendations

For a 4K display, the data clearly points to Medium settings as the optimal balance. At 3840x2160, Medium delivers 77 FPS average, with a minimum of 65 FPS that keeps gameplay smooth. High settings drop to 58 FPS average, which is playable but leaves little margin for demanding scenes, and Ultra falls to 55 FPS, which risks noticeable stutter in busy areas. The jump from Medium to High at 4K costs 19 FPS, while the jump from High to Ultra costs only 3 FPS — the latter is a poor trade for the visual gain.

At 1440p, the recommendation shifts upward. Medium produces 104 FPS, which is excellent, but High at 78 FPS and Ultra at 74 FPS are both viable for a high-refresh-rate monitor. Given that the difference between High and Ultra at 1440p is only 4 FPS, Ultra is the better choice for those who prioritize visual fidelity, as the performance cost is minimal. Low settings at 1440p yield 133 FPS, but this is unnecessary headroom that sacrifices too much visual quality.

At 1080p, the system is extremely capable across all presets. Ultra achieves 92 FPS, High reaches 97 FPS, and Medium hits 129 FPS. The data shows that Low at 166 FPS is overkill for most displays, and even the most demanding preset (Ultra) maintains a comfortable frame rate. For competitive play or maximum smoothness, Medium at 129 FPS is the sweet spot, but for a visually rich simulation, Ultra at 92 FPS is fully acceptable.

The overall best experience across all resolutions is Medium at 4K, as it is the only 4K preset that comfortably exceeds 60 FPS with a recorded minimum above 60 (65 FPS). For users with 1440p displays, Ultra is recommended because the 74 FPS average is well within the range of high-refresh gameplay, and the visual upgrade over High is significant.

How This Combo Ranks

The combo's rank of 815 out of 3714 tested combinations places it in the top 22% of all systems tested for Microsoft Flight Simulator. This is a strong result, but it is not the absolute top tier. The RTX 4090 Mobile has a Passmark G3D score of 27212, which ranks in the 84th percentile among all GPUs, while the Intel Core Ultra 7 265HX has an average benchmark score of 63173, placing it in the 93rd percentile among all CPUs. The slightly lower GPU percentile compared to the CPU percentile suggests that the graphics card is the more limiting factor in this pairing.

Comparing the CPU to its nearest rivals, the Core Ultra 7 265HX is essentially tied with the Intel Core i7-13790F, which has an average score of 63080 and a delta of 0.1%. The AMD Ryzen AI 7 450G is 0.2% higher (63331), and the AMD Ryzen AI Embedded P185 is 0.5% higher (62839). The Intel Core Ultra 7 255HX is 0.7% lower (62738). These tiny deltas mean the CPU choice has virtually no impact on the gaming result — the performance difference between these processors is within measurement noise.

The GPU's nearest rivals tell a similar story. The NVIDIA Quadro M6000 scores 43301 (0.8% higher), the RTX 5050 Mobile scores 43268 (0.9% higher), and the RTX A6000 scores 44075 (0.9% lower). The RTX 4090 Mobile's score of 43667 sits right in the middle of this pack. In practical terms, this means the measured FPS in this game would be nearly identical if any of these GPUs were substituted, assuming the rest of the system remained constant.

CPU Role

The Intel Core Ultra 7 265HX is a 20-core, 20-thread processor based on the Arrow Lake-HX architecture. It has a base clock of 2.60 GHz and a boost clock of 5.30 GHz, with a TDP of 55 W. The 30 MB of shared L3 cache and dual-channel DDR5 memory support (with a bandwidth of 102.4 GB/s) provide ample data throughput for a simulation title like Microsoft Flight Simulator, which relies heavily on loading terrain and aircraft data.

In this game, the CPU's role appears to be secondary to the GPU. At 1080p Low, the system achieves 166 FPS, which is a high enough frame rate to suggest the CPU is not a bottleneck at lower resolutions. The Passmark multithread score of 47985 and single-thread score of 4500 indicate strong all-around performance, but the game's scaling behavior — where FPS drops consistently as resolution increases — points to GPU-bound performance at higher resolutions.

The CPU's benchmark scores are impressive: Cinebench R23 multicore hits 40642 and single-core hits 5737. These numbers place the processor in the 93rd percentile of all CPUs, confirming that it has more than enough compute power for this game. However, the fact that the frame rate at 4K Ultra (55 FPS) is only slightly lower than 4K High (58 FPS) suggests that the GPU is the limiting factor, not the CPU. If the CPU were the bottleneck, we would expect a larger drop when moving to higher settings at the same resolution.

The 20 threads are more than sufficient for a flight simulator, which typically uses a handful of threads for physics, rendering, and terrain streaming. The boost clock of 5.30 GHz ensures that single-threaded tasks, which are common in game logic, are handled with minimal latency. The data indicates that the CPU is well-matched to the RTX 4090 Mobile, providing enough headroom to avoid bottlenecking at any resolution or setting combination tested.

Measured FPS Breakdown

At 1920x1080, the system delivers its highest frame rates. Low settings produce an average of 166 FPS, Medium reaches 129 FPS (with min 109 and max 148), High hits 97 FPS, and Ultra achieves 92 FPS. The spread from Low to Ultra is 74 FPS, which is the largest of any resolution, indicating that the GPU has plenty of headroom at 1080p and is not the limiting factor — the CPU and other system components can keep up with the graphics card's output.

At 2560x1440, the frame rates drop noticeably. Low averages 133 FPS, Medium averages 104 FPS (min 88, max 119), High averages 78 FPS, and Ultra averages 74 FPS. The drop from 1080p to 1440p is consistent across presets, roughly 33 FPS for Low, 25 FPS for Medium, 19 FPS for High, and 18 FPS for Ultra. This scaling is expected as the GPU works harder to fill more pixels.

At 3840x2160, the performance impact is the most severe. Low averages 98 FPS, Medium averages 77 FPS (min 65, max 88), High averages 58 FPS, and Ultra averages 55 FPS. The difference between High and Ultra at 4K is only 3 FPS, which is the smallest gap across all resolutions. This suggests that at 4K, the GPU is so heavily loaded that the additional visual complexity of Ultra settings has a minimal impact on frame rate — the pixel count is the dominant cost.

The Medium preset is the only one with complete min/max data across all resolutions. At 1080p, the min is 109 and max is 148 (a 39 FPS range); at 1440p, the min is 88 and max is 119 (a 31 FPS range); and at 4K, the min is 65 and max is 88 (a 23 FPS range). The narrowing range as resolution increases indicates more stable frame pacing, which is a typical characteristic of GPU-bound scenarios where the GPU's workload is more consistent. This data confirms that the RTX 4090 Mobile is the limiting component at higher resolutions, while the CPU has sufficient headroom to maintain consistent performance.