Microsoft Flight Simulator

The Intel Core Ultra X9 388H paired with the NVIDIA GeForce RTX 4090 delivers a mixed bag of results in Microsoft Flight Simulator, ranking in the 79.5th percentile of tested combinations. The combo places 614th out of 2,996 tested configurations, which places it firmly in the upper tier of systems, though it does not crack the top 20 percent. This ranking is heavily influenced by the CPU’s mid-pack position among its peers, while the GPU sits near the top of its own class, creating a pairing where the processor can become a limiting factor at lower resolutions.

How This Combo Ranks

The combo’s 614th rank out of 2,996 tested combos places it in the top quarter of all tested systems, a solid position for a flight simulator that is known to stress both CPU and GPU heavily. The CPU, Intel Core Ultra X9 388H, holds the 88th percentile against all CPUs, which is a strong score but not elite. Its average benchmark score of 44,466 is nearly identical to its nearest rival, the AMD Ryzen 5 7500X3D, which scores 44,573 — a delta of -0.2 percent, meaning the Intel chip is a hair slower. The CPU also sits just ahead of the Intel Core i9-13950HX (44,342, +0.3 percent delta) and the AMD Ryzen AI Max 385 (44,309, +0.4 percent delta), and it edges out the Intel Core i5-13600 (44,240, +0.5 percent delta). These deltas are tiny, all within half a percent, so the Ultra X9 388H is essentially tied with four other processors in raw compute power, none of which are clear winners.

On the GPU side, the RTX 4090 also holds the 88th percentile against all GPUs, with an average benchmark score of 60,347. Its nearest rival, the Intel Arc Pro A60, scores 60,326, a delta of 0 percent, making them effectively equal in average synthetic benchmarks. The AMD Radeon Pro W6600M scores 61,896, which is 2.5 percent higher, while the AMD Radeon Pro Vega 48 scores 60,140, a 0.3 percent delta, and the AMD Radeon PRO V710 scores 58,657, a 2.9 percent delta. These rival comparisons are for the GPU alone; in actual game FPS, the pairing’s rank reflects the combined performance, and the data shows the CPU can hold back the GPU at lower resolutions.

GPU Role

The NVIDIA GeForce RTX 4090 is a massive piece of silicon, built on the Ada Lovelace architecture with a 5 nm process from TSMC. It packs 76,300 million transistors on a 609 mm² die, with a transistor density of 125.3M per mm². The GPU features 16,384 shading units, 512 texture mapping units, 176 raster output units, 128 ray tracing cores, and 512 tensor cores. Its base clock runs at 2235 MHz, with a boost clock of 2520 MHz, and memory is clocked at 1313 MHz, which translates to 21 Gbps effective. The 24 GB of GDDR6X memory sits on a 384-bit bus, providing 1.01 TB/s of bandwidth. This memory configuration is critical for Microsoft Flight Simulator, which loads vast terrain and aircraft data; the high bandwidth and large capacity ensure texture streaming rarely becomes a bottleneck.

The GPU’s compute capabilities are substantial: 82.58 TFLOPS for both FP32 and FP16, with a pixel rate of 443.5 GPixel/s and a texture rate of 1,290.2 GTexel/s. In this game, the RTX 4090’s role is to render complex scenery, weather effects, and detailed cockpit instruments. At 4K Ultra settings, the measured average FPS drops to 55, which suggests the GPU is working near its limits under maximum load. However, the data shows that the GPU is not consistently the limiting factor; at 1080p Low, the average FPS jumps to 166, indicating that the CPU is likely capping performance before the GPU can stretch its legs. The GPU’s 88th percentile ranking is strong, but its nearest rival list includes professional workstation cards, which highlights that raw benchmark scores do not always translate directly to gaming performance in this simulator.

CPU Role

The Intel Core Ultra X9 388H is a 16-core, 16-thread mobile processor based on the Panther Lake architecture, manufactured on Intel’s 3 nm process. It has a base clock of 2.10 GHz and a boost clock of 5.10 GHz, with a TDP of 25 W, which is remarkably low for a processor with this core count. The cache hierarchy includes 192 KB of L1 per core, 3 MB of L2 per core, and 18 MB of shared L3 cache. Memory support is LPDDR5X over a dual-channel bus, yielding 153.6 GB/s of bandwidth. This CPU is designed for mobile use, with an integrated Arc B390 GPU, but in this combo it is paired with the discrete RTX 4090.

In Microsoft Flight Simulator, the CPU is responsible for simulating flight dynamics, AI traffic, and weather systems, which are heavily single-threaded workloads. The data shows the Ultra X9 388H scores 2,200.5 in Cinebench R23 single-core and 18,911 in multi-core, with a PassMark single-thread score of 4,280. These scores are competitive with its rivals, but the delta between it and the AMD Ryzen 5 7500X3D is -0.2 percent, indicating the AMD chip has a slight edge in average compute. However, in this game, the CPU’s boost clock of 5.10 GHz is likely the more important factor for single-thread performance, as the title’s main loop often depends on a single core. The CPU’s 16 threads are useful for background tasks, but the game’s engine may not fully utilize all cores, which is why the measured FPS at 1080p Low (166 avg) is lower than what the GPU alone could achieve, suggesting a CPU bottleneck.

Measured FPS Breakdown

The measured FPS data covers three resolutions (1920x1080, 2560x1440, 3840x2160) and four settings (Low, Medium, High, Ultra), providing a clear picture of scaling. At 1080p, the Low preset averages 166 FPS, Medium averages 129 FPS (with a min of 109 and max of 148), High averages 97 FPS, and Ultra averages 92 FPS. The step from Low to Medium is a 37 FPS drop, while the step from High to Ultra is only 5 FPS, indicating diminishing returns at the top end. The min/max data for Medium shows a range of 39 FPS, which is the only setting with min/max recorded, suggesting frame time consistency is moderate.

Moving to 1440p, the Low preset averages 133 FPS, Medium averages 104 FPS (min 88, max 119), High averages 78 FPS, and Ultra averages 74 FPS. The drop from Low to Medium is 29 FPS, and from High to Ultra is 4 FPS. At 1440p, the CPU is still likely a factor, especially at Low settings where the GPU has more headroom. At 4K, the Low preset averages 98 FPS, Medium averages 77 FPS (min 65, max 88), High averages 58 FPS, and Ultra averages 55 FPS. The gap between High and Ultra narrows to 3 FPS, while the gap between Low and Medium is 21 FPS. Across all resolutions, the Low setting always provides the highest FPS, and the Ultra setting always the lowest, which is expected, but the magnitude of the differences varies.

Resolution Scaling

The scaling from 1080p to 4K reveals how the bottleneck shifts. At Low settings, the average FPS drops from 166 at 1080p to 133 at 1440p (a 20 percent drop) and then to 98 at 4K (a 26 percent drop from 1440p). This steep decline at Low settings indicates the CPU is the primary limiter at 1080p, as the GPU has enough headroom to render frames quickly, but the CPU cannot keep up with the game’s simulation logic. At High settings, the FPS drops from 97 at 1080p to 78 at 1440p (a 20 percent drop) and then to 58 at 4K (a 26 percent drop from 1440p), showing a similar relative decline. At Ultra settings, the FPS drops from 92 at 1080p to 74 at 1440p (a 20 percent drop) and then to 55 at 4K (a 26 percent drop from 1440p), which is almost identical scaling.

The data shows that the percentage drop from 1080p to 1440p is consistently around 20 percent across all settings, and from 1440p to 4K it is around 26 percent. This uniform scaling suggests that neither the CPU nor the GPU is a single bottleneck at a given resolution; rather, the load shifts. At 1080p Low, the CPU is the limiter, as evidenced by the 166 FPS cap. At 4K Ultra, the GPU is the limiter, as the 55 FPS is below the CPU’s potential cap. The 4K Medium setting shows a min FPS of 65 and max of 88, which is a 23 FPS range, indicating some frame time variance under load.

FAQ

Q: What is the overall rank of this CPU and GPU combo in Microsoft Flight Simulator?

A: The combo ranks 614th out of 2,996 tested combinations, placing it in the top quarter of all tested systems.

Q: How does the Intel Core Ultra X9 388H compare to its nearest CPU rival?

A: The Ultra X9 388H has an average benchmark score of 44,466, which is 0.2 percent lower than the AMD Ryzen 5 7500X3D’s score of 44,573.

Q: What is the highest average FPS measured for this combo?

A: The highest average FPS is 166, which occurs at 1920x1080 resolution with Low settings.

Q: What is the lowest average FPS measured?

A: The lowest average FPS is 55, which occurs at 3840x2160 resolution with Ultra settings.

Q: Does the RTX 4090 have a clear performance lead over its nearest rivals?

A: No, the RTX 4090’s average benchmark score of 60,347 is essentially tied with the Intel Arc Pro A60 (60,326, 0 percent delta), and it trails the AMD Radeon Pro W6600M by 2.5 percent.

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

A: At High settings, the average FPS drops from 97 at 1080p to 58 at 4K, a reduction of 39 FPS, or roughly 40 percent.

Settings Recommendations

For the best balance of visual fidelity and smoothness, the Medium preset is the strongest choice across all resolutions. At 1080p, Medium delivers 129 FPS average, which is 37 FPS lower than Low but still above 120 FPS for high refresh displays. At 1440p, Medium averages 104 FPS, which is playable on most monitors, and at 4K, Medium averages 77 FPS, which is the only setting at 4K that stays above 60 FPS. The Medium preset also has the only recorded min/max data, showing a range of 39 FPS at 1080p (min 109, max 148) and 23 FPS at 4K (min 65, max 88), indicating acceptable frame time consistency.

The High preset is a reasonable alternative if visual quality is prioritized over frame rate, but the data shows it is only 5 FPS faster than Ultra at 1080p (97 vs 92), 4 FPS faster at 1440p (78 vs 74), and 3 FPS faster at 4K (58 vs 55). This makes High a poor value, as it offers minimal performance gains over Ultra while sacrificing visual quality. The Low preset is only recommended for competitive or highest-FPS scenarios, as it provides the highest FPS (166 at 1080p, 133 at 1440p, 98 at 4K) but with significantly reduced visual detail. Given that Microsoft Flight Simulator is a visual experience, the Medium preset at 4K is likely the best overall experience, offering 77 FPS average with the game’s core features intact.