Microsoft Flight Simulator

The Intel Core i9-14900K paired with the AMD Radeon RX 6750 XT presents a compelling study in bottleneck dynamics within Microsoft Flight Simulator. The data reveals a system where the processor’s substantial headroom is consistently capped by the graphics card’s output, particularly as resolution climbs. This analysis breaks down the measured frames per second across the tested configurations, interpreting what the numbers mean for the overall experience.

Resolution Scaling

The measured FPS data shows a clear and predictable scaling pattern as resolution increases, but the magnitude of the drop tells a specific story about system balance. At 1080p with Low settings, the combo achieves an average of 128.8 FPS. Moving to 1440p at the same settings reduces this to 99.3 FPS, a 29.5 FPS drop. The jump to 4K at Low settings further reduces the average to 70.6 FPS, which represents a 45.1 FPS decline from the 1080p figure. This steep decline indicates that the GPU is becoming the primary limiting factor at higher pixel counts.

The scaling behavior under High settings is more moderate. The system produces 72.9 FPS at 1080p, 56.9 FPS at 1440p, and 44.5 FPS at 4K. The percentage drop from 1080p to 4K here is roughly 39%, which is smaller than the 45% drop seen at Low settings. This suggests that at higher graphical presets, the workload shifts more towards the GPU, but the CPU still manages to provide consistent frame pacing. The 4K High result of 44.5 FPS is essentially identical to the 4K Ultra result of 44.2 FPS, indicating that beyond a certain point, the GPU is saturated and additional visual fidelity comes at no extra frame cost.

The most extreme resolution penalty appears when comparing 1080p to 4K at Medium settings. The system runs at 98.5 FPS at 1080p, drops to 78.2 FPS at 1440p, and then significantly down to 57.5 FPS at 4K. This pattern reveals that the RX 6750 XT’s 12 GB memory buffer and 192-bit bus width are sufficient for 1080p and 1440p, but the 4K workload begins to strain the memory subsystem. The data indicates that 1440p is the sweet spot for this pairing, as the performance degradation from 1080p is acceptable, while 4K consistently pushes the GPU to its limits regardless of preset.

CPU Role

The Intel Core i9-14900K is a 24-core, 32-thread processor based on the Raptor Lake architecture, with a base clock of 3.20 GHz and a boost clock of 6.00 GHz. In Microsoft Flight Simulator, a title known for its reliance on single-thread performance, this CPU provides exceptional headroom. The benchmark results confirm this, with a Cinebench R23 single-core score of 7040 and a multi-core score of 49872. The CPU’s 97th percentile ranking against all CPUs indicates it is near the top of the performance stack.

Given this CPU’s capabilities, the measured FPS figures are almost entirely constrained by the GPU. The fact that 1080p Low yields 128.8 FPS while 4K Ultra yields 44.2 FPS is a direct reflection of the graphics card’s limits, not the processor’s. The CPU’s 36 MB of shared L3 cache and 2 MB per-core L2 cache help maintain stable frame delivery, but the data shows that the i9-14900K is never the bottleneck in this configuration. Even at 1080p with Low settings, where the CPU would typically be the limiting factor, the system still only manages 128.8 FPS, which is well below what this processor could theoretically deliver in a less GPU-bound scenario.

The nearest rival data places the i9-14900K within 0.9% of the Intel Core Ultra 7 265K and 0.7% of the Core Ultra 7 265KF, showing that its performance is tightly clustered with other high-end parts. However, in this specific game, the CPU’s role is to provide a stable foundation. The data shows that at 1440p Ultra, the system produces 59 FPS, which is only 9.7 FPS higher than the 4K Ultra result of 44.2 FPS. This narrow gap suggests that the CPU is feeding the GPU efficiently, but the GPU’s rendering capacity is the decisive factor in determining final frame rates.

Settings Recommendations

The measured rows provide clear guidance on the optimal settings for this hardware combination. At 4K, the difference between High and Ultra is negligible, with averages of 44.5 FPS and 44.2 FPS respectively. This makes High the sensible choice for 4K, as it delivers nearly identical performance with presumably lower visual overhead. The 4K Medium setting offers 57.5 FPS, which is a 29% improvement over High, making it the best option for smoother gameplay at this resolution, though it sacrifices some visual detail.

At 1440p, the situation improves significantly. The Medium preset delivers 78.2 FPS, which is a solid playable frame rate for a flight simulator. The High preset at 56.9 FPS is also viable, but Medium provides a 37% performance uplift over High. The Ultra preset at 59 FPS is only marginally better than High, suggesting that the Ultra preset in this game does not scale well with this GPU. For a balanced experience, 1440p Medium appears to be the optimal choice, offering a frame rate that is 36% higher than the 4K Medium result.

At 1080p, all presets are playable, but the data suggests that High is the most reasonable default. The 1080p High result of 72.9 FPS is only 3.5 FPS lower than the 1440p Low result of 99.3 FPS, which is counterintuitive but shows that the Low preset at 1440p is less demanding than High at 1080p. The 1080p Ultra result of 68.7 FPS is just slightly below the 1080p High result, making High the better value in terms of frame rate per visual setting. The 1080p Low result of 128.8 FPS is the highest measured value, but it sacrifices too much visual quality for a flight simulator where terrain detail is crucial.

How This Combo Ranks

The combination of the Intel Core i9-14900K and AMD Radeon RX 6750 XT ranks 881st out of 1795 tested combos in Microsoft Flight Simulator. This places the system in the lower half of the database, which is expected given the GPU’s mid-range positioning. The RX 6750 XT sits in the 79th percentile of all GPUs, with an average benchmark score of 35327. Its nearest rival is the NVIDIA GeForce RTX 3080, which scores 35787, a delta of -1.3%, meaning the RX 6750 XT is slightly slower on average.

The ranking of 881 out of 1795 indicates that this combo is not optimized for this specific game. The CPU’s 97th percentile performance is effectively wasted in this pairing, as the GPU holds back the system. The data shows that the combo’s performance is heavily dependent on the GPU’s capabilities, and the GPU’s 79th percentile ranking is a better predictor of the overall result. This is a classic case of an overpowered CPU paired with a mid-range GPU, resulting in a system that performs well at 1080p but struggles to maintain high frame rates at 4K.

The rank is further contextualized by the GPU’s nearest rivals. The RX 6750 XT is only 0.2% faster than the AMD Radeon RX 5600M and 0.9% slower than the AMD Radeon 880M. This tight clustering suggests that the RX 6750 XT is not a standout performer, and its 12 GB of VRAM is adequate but not exceptional for modern titles. In Microsoft Flight Simulator, which can be demanding on memory bandwidth, the GPU’s 432.0 GB/s bandwidth is a limiting factor at higher resolutions.

GPU Role

The AMD Radeon RX 6750 XT is built on the RDNA 2.0 architecture with a 7 nm process from TSMC, featuring 2560 shading units and 40 ray accelerators. Its boost clock of 2600 MHz and game clock of 2495 MHz are respectable, but the data shows that this GPU is the primary bottleneck in this system. The GPU’s 12 GB of GDDR6 memory on a 192-bit bus delivers 432.0 GB/s of bandwidth, which is sufficient for 1080p and 1440p but becomes strained at 4K.

The measured FPS data clearly illustrates the GPU’s limitations. At 4K Ultra, the system produces 44.2 FPS, which is barely above the 4K High result of 44.5 FPS. This indicates that the GPU is fully saturated at 4K, and increasing settings from High to Ultra has no meaningful impact on performance. The GPU’s 13.31 TFLOPS of FP32 performance is the limiting factor here, as the rendering workload at 4K exceeds its capabilities.

The GPU’s benchmark scores reinforce its mid-range status. It scores 20700 in Passmark G3D and 9550 in Passmark GPU Compute, placing it in the 79th percentile. The nearest rival data shows it is within 1.3% of the NVIDIA GeForce RTX 3080, which is a higher-tier card, indicating that the RX 6750 XT offers competitive performance for its class. However, in this specific game, the GPU’s memory bandwidth and pixel rate of 166.4 GPixel/s are the deciding factors. The data suggests that for this combo, the GPU is the component that users should upgrade first to achieve higher frame rates, particularly at 1440p and 4K resolutions.