Rust

The AMD Ryzen 5 7400F and AMD Radeon RX 6800 XT combination delivers a performance profile in Rust that is heavily dictated by resolution and graphics settings. The data reveals a system capable of high refresh rate gaming at 1080p, but one that becomes increasingly GPU-bound as resolution climbs to 4K. This analysis breaks down the measured FPS figures, contextualizes the hardware's role, and explains how this pairing ranks among other tested configurations.

Resolution Scaling

The measured FPS data shows a clear and predictable scaling pattern across the three tested resolutions. At 1920x1080 with Low settings, the combo produces an average of 209 FPS. Moving to 2560x1440 at the same Low settings, the average drops to 144 FPS, a reduction of 65 FPS or roughly 31%. At 3840x2160 Low, the average falls further to 85 FPS, which is 59 FPS lower than the 1440p result and 124 FPS lower than the 1080p result. This scaling indicates that even at Low settings, the GPU is the primary limiting factor as pixel count increases.

The scaling curve steepens considerably with higher graphical presets. At High settings, the combo achieves 119 FPS at 1080p, 82 FPS at 1440p, and 48 FPS at 4K. The gap between 1080p and 4K at High settings is 71 FPS, demonstrating that the RX 6800 XT's workload grows substantially with resolution when visual fidelity is prioritized. At Ultra settings, the numbers are 90 FPS at 1080p, 62 FPS at 1440p, and 37 FPS at 4K. The 4K Ultra result represents a 59% decrease from the 1080p Ultra figure, highlighting the extreme demand of the highest preset at UHD resolution.

The Medium preset provides the only complete data set with min and max FPS values. At 1080p Medium, the average is 140 FPS with a minimum of 119 and maximum of 162. At 1440p Medium, the average is 97 FPS with a range of 82 to 111. At 4K Medium, the average is 57 FPS with a range of 49 to 66. The minimum FPS values at each resolution are notably close to the averages, suggesting relatively stable frame pacing rather than sporadic dips. The scaling from 1080p to 1440p at Medium is a 43 FPS drop, while moving from 1440p to 4K costs another 40 FPS, showing a consistent performance penalty per resolution step.

This data suggests that at 1080p, the system is partially CPU-bound, as the 209 FPS Low result far exceeds what would be expected if the GPU were the sole constraint. However, by 1440p and especially 4K, the RX 6800 XT becomes the definitive bottleneck. The 4K Low result of 85 FPS versus the 1080p Low result of 209 FPS indicates that the GPU's rendering throughput is the key factor limiting performance at higher resolutions, regardless of the relatively light CPU load that Low settings impose.

GPU Role

The AMD Radeon RX 6800 XT is a substantial piece of hardware with specifications that directly influence these Rust results. It features 16 GB of GDDR6 memory on a 256-bit bus, providing 512.0 GB/s of memory bandwidth. This large memory pool and high bandwidth are relevant for Rust, a game known for its large, persistent world and frequent asset streaming. The GPU's 4608 shading units, 288 texture mapping units, and 128 raster operation units provide the raw compute power needed to handle the game's complex geometry and lighting.

The GPU's clock behavior is also a factor. With a base clock of 1825 MHz, a game clock of 2015 MHz, and a boost clock of 2250 MHz, the RX 6800 XT can dynamically adjust its frequency based on workload. The benchmark results show that the GPU is capable of delivering high frame rates at lower resolutions, but the 300 W TDP and dual-slot cooler design suggest it is designed for sustained performance under heavy load. The 7 nm process node and RDNA 2.0 architecture, with 26,800 million transistors on a 520 mm² die, indicate a mature design optimized for rasterization performance.

In the context of these Rust measurements, the GPU's role is most evident in the scaling pattern. The 4K Ultra result of 37 FPS versus the 4K Low result of 85 FPS shows a 48 FPS difference purely from settings changes, underscoring how much the GPU's pixel and texture processing capabilities are taxed by higher presets. The 16 GB VRAM allocation is unlikely to be a limiting factor in Rust, as the game's requirements are typically well below this capacity, but the memory bandwidth of 512.0 GB/s helps maintain consistent frame delivery when the game world loads new areas.

How This Combo Ranks

The combination of the Ryzen 5 7400F and RX 6800 XT achieves a combo rank of 817 out of 2953 tested configurations in Rust. This places the pairing in the top 28% of all tested combos, indicating strong overall performance. The percentile ranking for the CPU is 83, meaning it outperforms 83% of all tested processors in general benchmarks. The GPU's percentile is 85, showing it outperforms 85% of all tested graphics cards. These individual strengths combine to produce a system that is well above average for this game.

The CPU's nearest rivals provide context for its standalone performance. The Intel Core i5-14600T has an average score of 32707, just 0.1% lower than the Ryzen 5 7400F's average benchmark score of 32750. The Intel Core Ultra 7 155H scores 32697, a 0.2% deficit. The AMD Ryzen 7 PRO 6850H scores 32812, which is 0.2% higher, and the AMD Ryzen AI 7 PRO 360 scores 32662, 0.3% lower. These deltaPct values are remarkably small, all within 0.3% of each other, indicating that the 7400F's CPU performance is tightly clustered with these competing models.

The GPU's nearest rivals show more variance. The NVIDIA RTX A1000 Mobile scores 47743, which is 1.5% lower than the RX 6800 XT's average score of 48477. The Intel Arc A550M scores 49737, 2.5% higher. The NVIDIA GeForce RTX 5070 Ti scores 49957, 3% higher, and the AMD Radeon RX Vega 64 also scores 50001, 3% higher. This places the RX 6800 XT slightly below these three faster cards, but the differences are modest, and the 6800 XT's strong showing in Rust's specific workload may differ from these synthetic averages.

Measured FPS Breakdown

The complete set of measured FPS data provides a granular view of performance across all resolution and settings combinations. At 1920x1080, the lowest tested resolution, the combo delivers its best results. Low settings produce an average of 209 FPS, which is exceptionally high and suitable for competitive play. Medium settings yield 140 FPS average with a minimum of 119 and maximum of 162. High settings reduce the average to 119 FPS, and Ultra settings bring it down to 90 FPS. The spread from 209 FPS at Low to 90 FPS at Ultra demonstrates a 119 FPS range, giving users significant flexibility to prioritize frame rate or visual quality.

At 2560x1440, the performance drops are consistent. Low settings average 144 FPS, still very smooth for most displays. Medium settings average 97 FPS with a range of 82 to 111. High settings average 82 FPS, and Ultra settings average 62 FPS. The transition from 1080p to 1440p costs roughly 30-35% of the frame rate at each settings level, which is a typical penalty for a 78% increase in pixel count. The 1440p Ultra result of 62 FPS is playable but does not reach the 144 Hz refresh rate that many 1440p monitors offer.

At 3840x2160, the system's limits become apparent. Low settings average 85 FPS, which is acceptable for 4K gaming. Medium settings average 57 FPS with a minimum of 49 and maximum of 66. High settings average 48 FPS, and Ultra settings average 37 FPS. The 4K Ultra result of 37 FPS is below the 60 FPS threshold that most gamers consider the minimum for smooth play, indicating that this combination is not ideal for maxed-out 4K gaming. However, the 4K Low result of 85 FPS shows that the hardware can handle 4K when settings are reduced.

FAQ

Q: What is the best resolution for this combo in Rust?

A: Based on the measured data, 1920x1080 provides the highest frame rates, with Low settings reaching 209 FPS and High settings still delivering 119 FPS. At 2560x1440, High settings produce 82 FPS, which is playable, while 4K requires Low settings to achieve 85 FPS.

Q: How much performance is lost when moving from 1080p to 4K?

A: At Low settings, the frame rate drops from 209 FPS at 1080p to 85 FPS at 4K, a 124 FPS decrease. At High settings, the drop is from 119 FPS to 48 FPS, a 71 FPS decrease. At Ultra settings, the drop is from 90 FPS to 37 FPS, a 53 FPS decrease.

Q: Is the RX 6800 XT's 16 GB VRAM sufficient for Rust?

A: The measured data does not indicate any VRAM-related performance issues. The 16 GB GDDR6 memory with 512.0 GB/s bandwidth is a high-capacity configuration that should comfortably handle Rust's world streaming, as the game's requirements are typically lower than this capacity.

Q: How does this combo rank compared to other tested systems?

A: This combination ranks 817 out of 2953 tested combos in Rust, placing it in the top 28% of all configurations. The CPU ranks in the 83rd percentile and the GPU in the 85th percentile among all tested components.

Q: What frame rates can I expect at 1440p Ultra settings?

A: The measured data shows an average of 62 FPS at 2560x1440 with Ultra settings. This is a playable frame rate but below the 144 Hz refresh rate that many 1440p monitors support, so users may need to reduce to High settings for 82 FPS.

Q: Does the CPU or GPU limit performance more in this game?

A: The data suggests the GPU is the primary limiter at higher resolutions. At 1080p Low, the 209 FPS result indicates the CPU can drive very high frame rates, but the steep drop to 85 FPS at 4K Low shows the GPU's rendering capacity is the bottleneck as resolution increases.

CPU Role

The AMD Ryzen 5 7400F is a 6-core, 12-thread processor based on the Zen 4 architecture, codenamed Raphael. It operates on the AMD Socket AM5 platform and is manufactured on a 5 nm process at TSMC. The CPU has a base clock of 3.70 GHz and a boost clock of 4.70 GHz, with a 65 W TDP. Its cache hierarchy includes 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3 cache. This configuration provides solid single-threaded and multi-threaded performance, as evidenced by its Cinebench R23 scores of 3072 single-core and 21765 multi-core.

In Rust, the CPU's role is most apparent at lower resolutions where the GPU is less taxed. The 1080p Low result of 209 FPS suggests that the 7400F's single-thread performance, driven by its 4.70 GHz boost clock, is sufficient to feed the GPU at high frame rates. The Passmark single-thread score of 3689 and multi-thread score of 25645 indicate a balanced processor that can handle both the game logic and the background tasks. The 83rd percentile ranking versus all CPUs places it in the upper tier of processors, and its nearest rivals show it is competitive with the Intel Core i5-14600T and Core Ultra 7 155H, both of which are within 0.2% in average benchmark score.

The CPU's memory support for DDR5 with dual-channel configuration and 83.2 GB/s bandwidth is relevant for Rust, which can be memory-intensive due to its large world and many entities. The 32 MB L3 cache helps reduce memory latency, potentially improving frame consistency. While the GPU becomes the bottleneck at 4K, the CPU's performance at 1080p and 1440p ensures that it does not hold back the system. The 6 cores and 12 threads are adequate for Rust's threading model, and the data shows no evidence of CPU-related frame drops, as the minimum FPS values at Medium settings (119 at 1080p, 82 at 1440p, 49 at 4K) are all relatively close to their respective averages.