Rust

The AMD Ryzen 9 8945HX and NVIDIA GeForce RTX 5090 combination delivers a wide spread of performance in Rust, with average frame rates ranging from 41 FPS at 4K Ultra to 229 FPS at 1080p Low. The data reveals a system where the GPU is the primary scaling factor across resolutions, while the 16-core CPU provides a robust foundation that prevents bottlenecking even at high frame rates. This analysis breaks down the measured results to understand where the limits lie and how to best configure the game for this specific hardware pairing.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data shows a pronounced and consistent drop in performance as resolution increases, which is a classic indicator of a GPU-limited scenario. At High settings, the average frame rate falls from 134 FPS at 1920x1080 to 92 FPS at 2560x1440, a decrease of 42 FPS. The trend continues to 3840x2160, where the average drops further to 54 FPS, representing a total loss of 80 FPS from the 1080p baseline. This scaling pattern suggests that the rendering load is scaling heavily with pixel count, placing the burden squarely on the NVIDIA GeForce RTX 5090's rasterization and shading capabilities.

Examining the Low settings row provides even clearer evidence of this GPU-bound behavior. At 1920x1080, the system achieves an average of 229 FPS. Moving to 2560x1440, that number falls to 163 FPS, and at 3840x2160, it reaches 96 FPS. The percentage drops are significant at each step, with the 4K result being less than half of the 1080p result. If the CPU were the limiting factor, we would expect to see a plateau in frame rates at lower resolutions where the CPU cannot push more frames, but the data shows no such plateau; instead, the FPS scales almost inversely with the number of pixels, confirming the GPU is doing the heavy lifting.

The delta between the Medium settings rows, which include min and max FPS values, further illustrates the resolution sensitivity. At 1920x1080 Medium, the average is 159 FPS with a max of 183 FPS. At 2560x1440 Medium, the average drops to 109 FPS, and at 3840x2160 Medium, it falls to 65 FPS. The fact that the frame rate continues to drop so steeply at 4K, even with a flagship mobile GPU, suggests that Rust's rendering pipeline at this resolution is extremely demanding on the graphics processor, leaving little headroom for the CPU to influence the final output.

This data implies that for users targeting 4K, the RTX 5090 is the deciding factor in performance. The gap between 1440p and 4K is larger than the gap between 1080p and 1440p, indicating that the jump to 4K roughly doubles the pixel workload, and the GPU's raw throughput is what determines the final frame rate. Conversely, at 1080p, the system is likely approaching a point where other factors, such as draw call submission or driver overhead, could start to matter, but the measured numbers show the GPU is still the main constraint, just with more headroom available.

GPU Role — VRAM, clocks, and how they relate to this game's results

The NVIDIA GeForce RTX 5090 is equipped with 32 GB of GDDR7 memory on a 512-bit bus, providing a memory bandwidth of 1.79 TB/s. In a game like Rust, which features large, persistent worlds and complex base building, memory capacity and bandwidth can be critical. The 32 GB allocation is far beyond what the game is likely to use at any of the tested settings, meaning the GPU will not be limited by capacity, but the high bandwidth helps ensure that texture streaming and asset loading do not cause stutters, contributing to the stable average FPS seen in the data.

The GPU's clock speeds are listed as a base of 2017 MHz and a boost of 2407 MHz. These clocks, combined with the massive 104.8 TFLOPS of FP32 performance, provide the raw compute power needed to process the game's lighting, shadows, and post-processing effects. The measured results show that at 4K Ultra, the system falls to 41 FPS, which indicates that even with this high compute throughput, the most demanding settings at the highest resolution are too much for a smooth experience. The boost clock behavior is crucial here, as sustained boost under load directly impacts the average FPS figures.

The RTX 5090's benchmark scores place it in the 92nd percentile of all GPUs, with an average benchmark score of 79842. Its nearest rivals include the NVIDIA Tesla P100 PCIe 16 GB with a score of 79605 (a 0.3% delta) and the AMD Radeon RX 6850M XT with a score of 78940 (a 1.1% delta). These comparisons show that while the RTX 5090 is a top-tier performer, the margin over some other high-end cards is not as large as the generational leap might suggest, which aligns with the observed FPS numbers that, while high, are not extraordinarily above what a strong mid-range card might achieve in this specific title.

The data implies that the GPU's role is to provide the baseline rendering capability, and its 32 GB frame buffer ensures that resolution and texture settings do not cause memory-related performance cliffs. The 1.79 TB/s bandwidth is likely a key factor in maintaining the high average FPS at 1440p, where the system manages 163 FPS on Low settings. However, the significant drop at 4K Ultra shows that the GPU's compute units, not its memory, are the limiting factor when all settings are maxed out, as the game's visual complexity increases the pixel shader workload substantially.

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 9 8945HX provides 16 cores and 32 threads, based on the Zen 4 architecture, with a base clock of 2.50 GHz and a boost clock of 5.40 GHz. This high core count and boost capability give the CPU ample headroom to handle game logic, AI, and the physics simulations that are common in survival games like Rust. The fact that the FPS scales down linearly with resolution, rather than hitting a wall, suggests that the CPU is not the primary bottleneck, as it is able to feed the GPU with enough frames even at the 229 FPS average seen at 1080p Low.

The CPU's cache configuration includes 64 MB of L3 cache, which is beneficial for keeping frequently accessed data close to the cores. In a game like Rust, where players interact with a dynamic environment and many entities, this large cache can reduce memory latency and improve frame time consistency. The measured data shows no signs of CPU-related stuttering, as the min FPS values at Medium settings (135 FPS at 1080p, 93 FPS at 1440p, 55 FPS at 4K) are relatively close to the average FPS, indicating a stable frame delivery from the CPU side.

Benchmark results for the Ryzen 9 8945HX show a Cinebench R23 multi-core score of 42713 and a single-core score of 6030. These scores place the CPU in the 95th percentile of all CPUs, with an average benchmark score of 76212. Its nearest rival is the Intel Core Ultra 9 285HX, which has an average score of 76155, a delta of 0.1%, meaning the two are virtually identical in overall performance. This parity indicates that the choice between these two CPUs would not significantly affect Rust's frame rates, further supporting the idea that the GPU is the dominant factor in this pairing.

The relationship between the CPU's capabilities and the game's results is most evident at lower resolutions. At 1080p Low, the system achieves 229 FPS, which is a high frame rate that requires a capable CPU to process the game loop quickly enough. The Ryzen 9 8945HX's 5.40 GHz boost clock and 16 cores ensure that even if Rust uses a few threads heavily for main thread logic, there are plenty of other cores available for background tasks, preventing any single-core bottleneck from limiting the maximum FPS. The data shows that the CPU is a capable partner, but its influence on the final FPS number is secondary to the GPU's raw rendering power.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

At 1920x1080, the system delivers a wide range of performance depending on the preset. On Low settings, the average FPS is 229, which is the highest recorded in the dataset. Moving to Medium, the average drops to 159 FPS, with a minimum of 135 and a maximum of 183. High settings produce an average of 134 FPS, while Ultra settings reduce the average to 102 FPS. This 127 FPS difference between Low and Ultra at 1080p shows the significant impact of graphical fidelity on the frame rate, but even the Ultra setting remains comfortably playable.

At 2560x1440, the performance scales down as expected. Low settings yield an average of 163 FPS, which is still very high and suitable for competitive play. Medium settings bring the average to 109 FPS, with a minimum of 93 and a maximum of 126, indicating a playable range with some variance. High settings average 92 FPS, and Ultra settings drop to 70 FPS. The step from Low to Ultra at this resolution is 93 FPS, showing that the higher pixel count amplifies the cost of the Ultra preset, but the system still maintains frame rates above 60 FPS for all settings tested.

At 3840x2160, the data reveals the most demanding scenario. Low settings produce an average of 96 FPS, which is still a solid frame rate for a 4K experience. Medium settings average 65 FPS, with a minimum of 55 and a maximum of 74, placing it right at the edge of smooth gameplay. High settings drop to an average of 54 FPS, and Ultra settings fall to 41 FPS. The trend shows that at 4K, only the Low preset provides a clearly smooth experience, while Medium is borderline, and High and Ultra are likely to be too choppy for most users.

The Medium settings rows are the only ones with min and max FPS data, providing insight into frame time consistency. At 1080p, the range is 135 to 183 FPS, a spread of 48 FPS. At 1440p, the range is 93 to 126, a spread of 33 FPS. At 4K, the range is 55 to 74, a spread of 19 FPS. This narrowing range at higher resolutions suggests that the GPU is more consistently saturated, reducing the variability caused by scene complexity, whereas at lower resolutions, the CPU or other factors may cause more significant spikes and dips in frame rate.

FAQ

Q: What is the highest average frame rate achieved by this combination?

A: The highest average frame rate is 229 FPS, achieved at 1920x1080 resolution with Low settings.

Q: Is this system capable of running Rust at 4K with Ultra settings smoothly?

A: The data shows an average of 41 FPS at 3840x2160 with Ultra settings, which is below the 60 FPS threshold typically considered smooth, so it is not recommended for a fluid experience.

Q: How much of a performance difference is there between Low and Ultra settings at 1440p?

A: At 2560x1440, Low settings average 163 FPS, while Ultra settings average 70 FPS, resulting in a difference of 93 FPS between the two presets.

Q: What are the minimum FPS values recorded for Medium settings at each resolution?

A: The minimum FPS for Medium settings is 135 at 1920x1080, 93 at 2560x1440, and 55 at 3840x2160.

Q: How does the CPU's benchmark score compare to its closest rival?

A: The AMD Ryzen 9 8945HX has an average benchmark score of 76212, while its closest rival, the Intel Core Ultra 9 285HX, scores 76155, a difference of 0.1%.

Q: Which resolution provides the best balance of frame rate and visual quality according to the data?

A: At 2560x1440 with High settings, the system averages 92 FPS, which offers a high frame rate with significantly better visuals than Low settings, representing a strong balance.

Settings Recommendations

For users prioritizing the highest possible frame rates, the 1920x1080 Low preset is the clear choice, delivering an average of 229 FPS. This setting is ideal for competitive scenarios where responsiveness is paramount. However, the visual quality will be noticeably reduced, and the data shows that moving to Medium at the same resolution still provides a very high average of 159 FPS, which is likely sufficient for most players while offering a substantial visual upgrade.

At 2560x1440, the data suggests that the High preset is the best option for a balanced experience. It achieves an average of 92 FPS, which is above the 60 FPS threshold for smooth gameplay, and provides a significant improvement in graphical fidelity over Medium, which only averages 109 FPS, a difference of 17 FPS. The Ultra preset at this resolution drops to 70 FPS, which is still playable, but the marginal visual gains over High may not justify the 22 FPS loss.

For 4K gameplay, the recommendation is to use the Low preset, which averages 96 FPS and provides a smooth experience. The Medium preset at 65 FPS is borderline, and the min FPS of 55 suggests it may dip into stutter territory. The High and Ultra presets at 54 FPS and 41 FPS, respectively, are not recommended for a consistently smooth experience, as they fall below the 60 FPS target. Users with G-Sync or VRR displays might tolerate the Medium preset, but for the best experience, Low is the safest choice.

The data overall indicates that the system is best utilized at 1080p or 1440p, where it can maintain high frame rates with elevated settings. At 4K, the GPU is pushed to its limits, and only the lowest preset provides a comfortable margin. The Medium settings data, with its min and max FPS values, shows that the frame pacing is more consistent at higher resolutions, but the average FPS is too low for the Ultra preset to be considered viable at 4K.

How This Combo Ranks

The combination of the AMD Ryzen 9 8945HX and NVIDIA GeForce RTX 5090 ranks 513th out of 2953 tested combinations in Rust. This places it in the top 17.4% of all tested systems, indicating that it is a high-performing pairing, but not at the absolute top of the leaderboard. The ranking suggests that there are many other combinations that can achieve higher frame rates in this specific game, likely due to the CPU and GPU being a mobile pairing, which may have power and thermal constraints compared to desktop counterparts.

The CPU's performance percentile of 95% and the GPU's percentile of 92% are both high, but the in-game rank of 513 is somewhat lower than what those individual percentiles might suggest. This discrepancy implies that Rust's performance is not solely dependent on raw benchmark scores, and that other factors, such as memory latency or specific driver optimizations, play a role. The nearest rivals for the GPU include the NVIDIA Tesla P100 PCIe 16 GB, which has a slightly lower average score but a 0.3% delta, showing that the RTX 5090 is closely matched with some data center parts in synthetic tests.

The fact that the combo ranks in the 513th position, despite having top-tier components, highlights that Rust is a game that can be demanding on the entire system. The data shows that even with a 16-core CPU and a flagship GPU, the frame rates at 4K Ultra are not exceptionally high, which reflects the game's engine and its reliance on both single-threaded performance and raw GPU power. The ranking indicates that for users looking to maximize FPS in Rust, this combination is strong, but there is room for other configurations to outperform it, particularly those with desktop-class components that can sustain higher clocks and power draw.

The in-game rank is a more holistic measure of performance than the individual component benchmarks, as it reflects the actual frame rates achieved in a real-world scenario. With over 2900 other combinations ranked, the 513th position is a solid result, but it also suggests that users should not expect this mobile setup to match the absolute best desktop configurations, which would likely rank higher due to their ability to maintain higher boost clocks for longer durations. The data confirms that this is a capable gaming system, but the specific demands of Rust prevent it from being a top-10 finisher.