Microsoft Flight Simulator

# How This Combo Ranks

This Intel Core i5-14600K + Intel Arc B390 combination ranks 3,302 out of 3,714 tested combos in Microsoft Flight Simulator, placing it in the bottom 11% of all configurations. This is a decisive verdict: the combo sits firmly in the lower tier of tested systems for this flight simulator, and the data reflects a severe bottleneck that will define the entire experience. The rank alone tells the story — this is not a combination built for smooth skies at high fidelity.

The CPU is not the problem. The Intel Core i5-14600K sits in the 90th percentile among all CPUs, with an average benchmark score of 48,618. Its nearest rivals are the Intel Xeon Gold 5318H at 48,698 (0.2% ahead), the AMD EPYC 4345P at 48,470 (0.3% behind), the Intel Core Ultra 5 245HX at 48,287 (0.7% behind), and the Intel Core Ultra 5 245 at 48,995 (0.8% ahead). That is a tight cluster of high-performing processors, and the i5-14600K is right in the middle of it. In Cinebench R23 multi-core, it scores 24,491; single-core, it reaches 2,064. In Geekbench, it posts 16,673 multi-core and 2,491 single-core. These are strong numbers that indicate a CPU fully capable of feeding a modern GPU in a simulation title.

The GPU tells a completely different story. The Intel Arc B390 ranks in the 9th percentile among all GPUs, with an average benchmark score of just 1,482 in 3DMark Steel Nomad DX12. Its nearest rivals are the NVIDIA GeForce GT 520MX (1,463, 1.3% behind), the NVIDIA GeForce 800M (1,460, 1.5% behind), the NVIDIA GeForce GT 625 OEM (1,446, 2.5% behind), and the NVIDIA GeForce GT 710 (1,443, 2.7% behind). This places the Arc B390 alongside entry-level integrated and legacy discrete GPUs from over a decade ago. The percentile ranking of 9 means that 91% of all GPUs in the database outperform it. This is the anchor dragging the entire combo down.

The data is measured, not estimated, and the measured FPS values across all resolutions and settings confirm the GPU bottleneck. At 1080p Low, the combo achieves 56 FPS average; at 1080p High, it drops to 33 FPS. At 4K Ultra, it falls to 19 FPS. The pattern is consistent: the GPU cannot keep up with the CPU's capability, and Microsoft Flight Simulator's demanding rendering pipeline exposes this imbalance at every turn. The combo rank of 3,302 out of 3,714 is a direct consequence of this GPU limitation, not a reflection of the CPU's potential.

# GPU Role

The Intel Arc B390 is built on the Xe3-LPG architecture with a Panther Lake chip, fabricated on a 3 nm process from Intel. It operates with a base clock of 300 MHz and a boost clock of 2,500 MHz. The memory configuration is "System Shared," meaning it relies on shared system memory rather than dedicated VRAM, with bandwidth described as "System Dependent." This is a fundamental limitation for a demanding simulator like Microsoft Flight Simulator, which benefits substantially from dedicated, high-bandwidth VRAM for streaming terrain and scenery data.

The GPU has 1,536 shading units, 48 texture mapping units, 24 raster output units, and 12 ray tracing cores. Its pixel rate is 60.00 GPixel/s, and its texture rate is 120.0 GTexel/s. Floating point performance is 7.680 TFLOPS for FP32 and 15.36 TFLOPS for FP16 (2:1 ratio). The TDP is 80 W, and it is classified as an IGP (integrated graphics processor) with no power connectors and a slot width of "IGP." The bus interface is also "IGP," and display outputs are "Portable Device Dependent," indicating this is designed for mobile or compact systems rather than desktop gaming rigs.

In 3DMark Steel Nomad DX12, the Arc B390 scores 1,482, which is nearly identical to the NVIDIA GeForce GT 520MX (1,463) and just ahead of the GeForce 800M (1,460). These are not gaming GPUs by any modern standard; they are legacy or entry-level parts. The 9th percentile ranking among all GPUs underscores this. For Microsoft Flight Simulator, which requires substantial GPU throughput for rendering cockpits, terrain, weather, and lighting, this GPU role is strictly limiting. The data shows that even at 1080p Low, the best-case scenario, the combo only reaches 56 FPS, and this is likely due to the GPU being pushed to its absolute limit while the CPU idles.

The shared memory architecture means that the GPU competes with the CPU for system memory bandwidth, and in a simulation that streams assets continuously, this can cause hitches and stutters. The 12 ray tracing cores are present, but at this performance level, enabling ray tracing would be impractical; the measured FPS values do not include ray tracing, and the data suggests that any ray-traced workload would push the GPU below playable thresholds. The GPU's role here is best described as a bottleneck — it is the component that determines the combo's rank and the FPS ceiling across all tested configurations.

# CPU Role

The Intel Core i5-14600K is a 14-core, 20-thread processor from the Core 14th Gen series, based on the Raptor Lake architecture (Raptor Lake-R refresh). It has a base clock of 3.50 GHz and a boost clock of 5.30 GHz, with a TDP of 125 W. The L3 cache is 24 MB shared, with L2 cache at 2 MB per core and L1 cache at 80 KB per core. It supports DDR4 and DDR5 memory in dual-channel configuration, and it uses the Intel Socket 1700. The process node is 10 nm from Intel, with a die size of 257 mm². It was released on 2023-10-16 with a launch MSRP of $319.

Benchmark results show a capable processor. Cinebench R23 multi-core score is 24,491, single-core is 2,064; Cinebench R20 scores are 13,709 and 1,935; Cinebench R15 scores are 3,640 and 297. PassMark results include multi-thread at 38,682, single-thread at 4,270, integer math at 125,737, floating point math at 92,794, and physics at 2,473. The CPU's percentile rank of 90 means it outperforms 90% of all CPUs in the database, and its average benchmark score of 48,618 places it in the same league as server and high-end desktop processors.

In Microsoft Flight Simulator, the CPU handles flight dynamics, AI traffic, weather simulation, and the core game logic. The i5-14600K's 14 cores and 20 threads are more than sufficient for these tasks, and the high boost clock of 5.30 GHz ensures strong single-thread performance, which is critical for the simulator's main thread. The data shows that the CPU is not the limiting factor: at 1080p Low, the combo achieves 56 FPS, but this is far below what the CPU alone could support if paired with a stronger GPU. The CPU's role is to feed the GPU with draw calls and simulation state, and in this configuration, it is doing so with significant headroom to spare.

The nearest rivals in CPU benchmarks — the Xeon Gold 5318H, EPYC 4345P, Core Ultra 5 245HX, and Core Ultra 5 245 — all score within 1% of the i5-14600K, confirming that this processor is a high performer in its class. The deltaPct values range from -0.8 to 0.7, meaning the i5-14600K trades blows with these parts within statistical noise. For a flight simulator, the CPU's single-core performance (Cinebench R23 single-core 2,064, Geekbench single-core 2,491) is particularly relevant, as Microsoft Flight Simulator is known to be sensitive to single-thread speed. The CPU is doing its job; the GPU is not.

# Measured FPS Breakdown

The measured FPS data covers three resolutions (1920x1080, 2560x1440, 3840x2160) and four settings (Low, Medium, High, Ultra), for a total of 12 data points. All values are average FPS unless noted; min and max values are only provided for Medium settings.

At 1920x1080, the combo achieves 56 FPS on Low, 43 FPS on Medium (with min 37 and max 50), 33 FPS on High, and 31 FPS on Ultra. This is the only resolution where the combo approaches playable frame rates, and only at the lowest settings. The jump from Low to Medium costs 13 FPS, from Medium to High costs 10 FPS, and from High to Ultra costs 2 FPS. The diminishing returns above Medium suggest that the GPU is hitting a performance ceiling that additional settings changes cannot overcome.

At 2560x1440, the numbers drop further: 45 FPS on Low, 35 FPS on Medium (min 30, max 40), 26 FPS on High, and 25 FPS on Ultra. The drop from 1080p to 1440p at the same settings is significant: Low falls from 56 to 45 FPS (an 11 FPS loss), Medium from 43 to 35 FPS (8 FPS loss), High from 33 to 26 FPS (7 FPS loss), and Ultra from 31 to 25 FPS (6 FPS loss). At 1440p, only Low and Medium maintain averages above 30 FPS, and Medium's minimum of 30 FPS is borderline.

At 3840x2160, the results are uniformly poor: 33 FPS on Low, 26 FPS on Medium (min 22, max 30), 19 FPS on High, and 19 FPS on Ultra. The 4K Low setting is the only one above 30 FPS, and it barely clears that threshold. High and Ultra both sit at 19 FPS, which is effectively unplayable for a flight simulator that requires precise control inputs. The Medium setting has a minimum of 22 FPS, indicating that even the average of 26 FPS is buoyed by moments of relative stability, but the experience will be choppy.

The data reveals a consistent pattern: the GPU is the bottleneck at every resolution and setting. At 1080p Low, 56 FPS is the best case, and that is only achieved by minimizing GPU load. At 4K Ultra, 19 FPS is the worst case, and it is identical to 4K High, suggesting that the GPU is so overloaded that the difference between High and Ultra settings has no measurable impact.

# Resolution Scaling

Resolution scaling from 1080p to 4K shows how the combo degrades as pixel count increases. At Low settings, the FPS drops from 56 at 1080p to 45 at 1440p (a 19.6% drop) and then to 33 at 4K (a 41.1% drop from 1080p, or 26.7% drop from 1440p). At Medium settings, the drop is from 43 to 35 to 26, representing an 18.6% drop from 1080p to 1440p and a 39.5% drop from 1080p to 4K. At High settings, the drop is from 33 to 26 to 19, which is a 21.2% drop to 1440p and a 42.4% drop to 4K. At Ultra settings, the drop is from 31 to 25 to 19, a 19.4% drop to 1440p and a 38.7% drop to 4K.

These percentage drops are relatively consistent across settings, indicating that the scaling is primarily driven by resolution rather than settings complexity. The GPU's fixed performance ceiling means that as pixel count increases, the frame rate falls in near-linear proportion. The fact that High and Ultra at 4K both produce 19 FPS is telling: the GPU is completely saturated, and no amount of quality reduction below High can recover meaningful performance at that resolution.

The scaling behavior points to the limiting component being the GPU. If the CPU were the bottleneck, we would expect to see FPS remain flat across resolutions, because the CPU would be the constraint regardless of pixel count. Instead, FPS drops consistently with resolution, which is the classic signature of a GPU-bound scenario. The CPU, with its 90th percentile ranking, has ample headroom; the GPU, with its 9th percentile ranking, is the ceiling. The data shows that at 1080p Low, the combo barely reaches 56 FPS, which is likely near the GPU's maximum output, and every additional pixel reduces that output further.

The resolution scaling also indicates that users who want to play at 1440p or 4K will need to make drastic compromises. At 1440p, only Low and Medium settings are above 30 FPS, and Medium's minimum is exactly 30. At 4K, even Low settings only reach 33 FPS, which is below the 60 FPS target that most flight sim enthusiasts prefer for smooth panning and instrument readability. The limiting component is unambiguously the GPU, and no CPU-side tuning can overcome this.

# Settings Recommendations

Based on the measured FPS rows, the optimal settings for this combo depend on the target resolution and the user's tolerance for frame rate. At 1080p, Low settings provide the best experience at 56 FPS, which is the only configuration in the entire data set that approaches a smooth simulation. Medium at 1080p drops to 43 FPS, which is still playable but with a noticeable reduction in smoothness; the min FPS of 37 indicates occasional dips that could be distracting during busy airport scenes or weather changes. High at 1080p (33 FPS) and Ultra (31 FPS) are marginal at best, and the data suggests that the visual quality gain from High to Ultra is not worth the 2 FPS loss.

At 1440p, Low settings at 45 FPS are the only configuration that provides a consistently playable experience. Medium at 35 FPS (min 30) is borderline; the minimum of 30 FPS is the threshold for playability, but any complex scene could push it lower. High (26 FPS) and Ultra (25 FPS) are not recommended, as they fall below 30 FPS and will result in choppy visuals that hinder precise flight control.

At 4K, none of the settings provide a truly playable experience. Low settings at 33 FPS is the best option, but even that will feel sluggish for a flight simulator. Medium at 26 FPS (min 22) is poor, and High/Ultra at 19 FPS are unplayable. Users with a 4K display should consider reducing the resolution to 1440p or 1080p if they want to use this combo.

The best overall experience, per the measured rows, is 1080p Low at 56 FPS. This is the only configuration that exceeds 50 FPS, and it provides the smoothest performance for the simulator's demanding camera movements and terrain streaming. If visual fidelity is a priority, 1080p Medium at 43 FPS is the highest setting that maintains an average above 40 FPS, but the min FPS of 37 suggests that users should be prepared for occasional stutters. For users who prefer higher resolutions, 1440p Low at 45 FPS is the recommended compromise, as it balances resolution and frame rate better than any other non-1080p option. The data is clear: this combo is best suited for 1080p Low or Medium, and anything beyond that sacrifices playability.