Rust

The Intel Core i5-14600KF paired with the NVIDIA GeForce RTX 4090 is a high-end combination that produces a complex performance curve in Rust, where the CPU’s strong single-threaded capabilities and the GPU’s massive headroom interact in unusual ways. The measured data reveals a system that can dominate at lower resolutions but begins to show its limitations as graphical fidelity and pixel count increase.

Resolution Scaling

Rust’s performance scaling from 1080p to 4K with this combo is steep, but the shape of the curve reveals which component is driving the frame rate. At 1080p with Low settings, the system posts 252 FPS, a figure that drops to 219.6 FPS at 1440p and then plummets to 127.3 FPS at 4K. That represents a 49.5% drop from 1080p Low to 4K Low, indicating that the RTX 4090 is being progressively saturated as resolution climbs, but the fact that even 4K Low still clears 120 FPS shows the GPU is never truly overwhelmed at lower presets.

The story changes dramatically when moving to Ultra settings. At 1080p Ultra, the combo delivers 135.8 FPS. At 1440p Ultra, that falls to 93.8 FPS, and at 4K Ultra, it bottoms out at 59.1 FPS. The 4K Ultra result is less than half of the 1080p Ultra figure, a 56.5% reduction. This aggressive scaling at higher settings points to a shift in the bottleneck: at 1080p and 1440p with lower presets, the Core i5-14600KF’s 14 cores and 20 threads are likely limiting the frame rate, as the RTX 4090’s 82.58 TFLOPS of FP32 compute is more than capable of pushing far beyond 252 FPS. At 4K Ultra, the GPU’s raw throughput and memory bandwidth (1.01 TB/s) become the primary constraint, pulling the average down toward 60 FPS.

The delta between Low and Ultra settings at each resolution highlights this transition. At 1080p, the gap is 116.2 FPS (252 vs. 135.8), while at 4K, the gap narrows to 68.2 FPS (127.3 vs. 59.1). The shrinking delta suggests that at 4K, both Low and Ultra presets are hitting a wall imposed by the GPU’s pixel throughput and the game’s draw calls, whereas at 1080p, the CPU’s ability to feed frames is the limiting factor. The data indicates this combo is best suited for high-refresh 1440p gaming, where the 1440p High result of 127.7 FPS sits comfortably, rather than chasing 4K Ultra at 59.1 FPS.

GPU Role

The RTX 4090’s role in this pairing is best understood through its memory subsystem and clock behavior. With 24 GB of GDDR6X memory on a 384-bit bus, the card provides 1.01 TB/s of bandwidth, which is critical for Rust’s large, procedurally generated worlds that stream assets continuously. The 21 Gbps effective memory clock and 1313 MHz memory base clock ensure that texture streaming and draw call data move quickly, but the benchmark results show that this bandwidth is only fully utilized at 4K Ultra, where the 59.1 FPS result suggests the GPU is working near its limits.

The GPU’s boost clock of 2520 MHz and base clock of 2235 MHz are modest for a flagship, but the architecture’s efficiency compensates. The 128 RT cores and 512 tensor cores are largely irrelevant for Rust, which is not a ray-traced title, but the 16,384 shading units provide ample raw rasterization power. That power is evident in the 4K Low result of 127.3 FPS, which shows the GPU can handle high pixel counts when the CPU keeps up. However, the 4K Ultra result of 59.1 FPS indicates that the 450 W TDP and 1.01 TB/s bandwidth are not enough to brute-force Ultra settings at native 4K, likely due to the game’s physics and object count scaling rather than pure shader complexity.

The GPU’s transistor count of 76,300 million on a 5 nm TSMC process gives it a density of 125.3M / mm², and the 609 mm² die size is massive. Yet the measured data shows the RTX 4090 is held back by the CPU at lower resolutions. At 1080p Low, the 252 FPS result is likely CPU-bound, as the RTX 4090 is capable of far more. The GPU’s passmark G3D score of 38194 and percentile rank of 91 versus all GPUs confirm its top-tier status, but in Rust, its role is to provide headroom that the i5-14600KF’s 5.30 GHz boost clock can only partially exploit.

How This Combo Ranks

In the database of tested combinations, this specific pairing of the Intel Core i5-14600KF and NVIDIA GeForce RTX 4090 achieves a combo rank of 18 out of 1717 tested combos. That places it in the top 1.05% of all configurations tested for Rust, a strong showing that reflects the hardware’s aggregate capability across all resolutions and settings. The rank is driven by the GPU’s dominance in 4K scenarios and the CPU’s strong single-core performance, which matters for Rust’s simulation-heavy gameplay.

The CPU’s nearest rivals provide context for its contribution to this rank. The Intel Core i5-14600K, which is essentially the same chip with a different power profile, scores 0.4% lower in average benchmarks, making the 14600KF effectively identical in performance. The AMD Ryzen 9 5950X trails by 0.6%, and the AMD EPYC 4345P leads by 0.5%, but these differences are within noise. The CPU’s percentile rank of 93 versus all CPUs underscores that it is a top-tier processor, though its 14 cores and 20 threads are not the absolute maximum available.

For the GPU, the nearest rivals are all professional or older workstation cards. The NVIDIA Tesla T4 is 0.4% faster in average score, while the AMD Radeon Pro Vega 56 is 0.9% slower. These deltas are negligible and do not reflect real gaming performance, as the RTX 4090’s 91st percentile rank and 82.58 TFLOPS of FP32 compute put it in a different class for rasterization. The combo rank of 18 is therefore a product of the GPU’s raw power at 4K and the CPU’s ability to maintain high frame rates at 1080p and 1440p, though the pairing is not optimized for maximum performance at any single resolution.

Measured FPS Breakdown

At 1920x1080, the combo delivers its best results. Low settings produce 252 FPS, which is the highest measured value across all resolutions. Medium settings drop to 216.7 FPS, High to 183 FPS, and Ultra to 135.8 FPS. The 1080p results show a consistent scaling pattern, with each step up in settings costing roughly 15-20% performance. The 135.8 FPS at Ultra is still well above 120 FPS, making this resolution ideal for high-refresh monitors.

At 2560x1440, the performance remains strong but the scaling becomes more pronounced. Low settings yield 219.6 FPS, which is a 12.9% drop from 1080p Low. Medium settings produce 147.6 FPS, High 127.7 FPS, and Ultra 93.8 FPS. The gap between Medium and High at 1440p is 19.9 FPS, while the gap between High and Ultra is 33.9 FPS, indicating that Ultra settings impose a significant cost. The 93.8 FPS at 1440p Ultra is still playable but falls short of 144 Hz refresh rates.

At 3840x2160, the combo’s limits become clear. Low settings yield 127.3 FPS, which is a 42% drop from 1080p Low. Medium settings drop to 89.1 FPS, High to 73.1 FPS, and Ultra to 59.1 FPS. The progression from Low to Ultra at 4K costs 68.2 FPS, and the Ultra result is barely above 60 FPS, making it marginal for smooth gameplay. The 4K High result of 73.1 FPS is more reasonable, but it is still a significant step down from the 1440p High result of 127.7 FPS.

Settings Recommendations

For players targeting 1080p, the data supports using Ultra settings, as the 135.8 FPS result is well above the 120 FPS threshold for smooth play, and the visual fidelity gain is substantial. The 1080p High setting at 183 FPS is also viable for those with 165 Hz monitors, but Ultra provides the best balance of image quality and frame rate.

At 1440p, the recommendation is High settings, which deliver 127.7 FPS. This is the sweet spot for the combo, as it maintains a high refresh rate while offering better visual quality than Medium (147.6 FPS) without the steep penalty of Ultra (93.8 FPS). The 1440p Ultra result is playable but not ideal for competitive play, and the 33.9 FPS cost over High is not justified for most users.

For 4K, the data suggests Medium settings as the best choice, yielding 89.1 FPS. This is above 60 FPS and provides a smooth experience, whereas High drops to 73.1 FPS and Ultra falls to 59.1 FPS. The 4K Low result of 127.3 FPS is technically the highest frame rate at this resolution, but the visual compromise is severe. The measured rows indicate that 4K Medium offers the best compromise between frame rate and fidelity, while 4K Ultra should be avoided unless a 60 Hz display is the target and visual quality is paramount.