Rust

The AMD Ryzen 5 8400F paired with the AMD Radeon RX 7800 XT delivers a highly capable 1080p and 1440p experience in Rust, with the data showing the GPU becoming the primary limiting factor only at 4K Ultra settings. This combination ranks in the 65th percentile of tested configurations, offering a strong balance between the 6-core Zen 4 processor and the 16 GB RDNA 3 graphics card.

FAQ

Q: What is the combo's overall ranking among tested systems in Rust?

A: The combination ranks 588th out of 1717 tested combos, placing it in the upper third of all configurations measured.

Q: How much faster is the Ryzen 5 8400F than its closest rival in synthetic benchmarks?

A: The Ryzen 5 8400F scores 25064 on average, which is essentially tied with the AMD Ryzen 7 2700X at 25057 (0% delta) and 0.3% ahead of the AMD Ryzen 5 7500F at 24993.

Q: What is the maximum average FPS achievable at 1080p with this setup?

A: At 1920x1080 with Low settings, the system reaches 204.9 FPS average, which is the highest measured result across all tested resolutions and settings.

Q: Does the RX 7800 XT outperform its nearest rival in GPU benchmarks?

A: The RX 7800 XT averages 32619, which is 0.2% ahead of the AMD FirePro S9300 X2 at 32540 and 0.7% ahead of the AMD FirePro S10000 at 32388.

Q: How does the CPU's multi-threaded performance compare to its single-threaded performance?

A: The Cinebench R23 multi-core score is 20851, while the single-core score is 2943, showing strong scaling across its 6 cores and 12 threads.

Q: What is the lowest FPS recorded for this combo in Rust?

A: The lowest average FPS is 34.2 at 3840x2160 with Ultra settings, which is the only configuration tested that drops below 40 FPS.

GPU Role

The AMD Radeon RX 7800 XT brings 16 GB of GDDR6 memory on a 256-bit bus, delivering 624.1 GB/s of bandwidth. This memory configuration is substantial for Rust, which can be demanding on VRAM in large multiplayer servers with many structures and entities. The GPU's base clock of 1295 MHz and boost clock of 2430 MHz (with a game clock of 2124 MHz) provide the computational headroom needed for the game's rendering workload.

The RDNA 3.0 architecture with 3840 shading units and 96 ROPs handles the game's draw calls efficiently. The benchmark data shows the GPU's role becoming more prominent at higher settings: at 1440p, the gap between Low and High settings is 59.6 FPS (137.6 vs 78), but at 4K, that gap widens to 32.7 FPS (80 vs 47.3). This indicates the GPU is increasingly stressed as resolution and settings scale, particularly with the 60 RT cores available for any ray-traced effects.

The GPU's 37.32 TFLOPS FP32 performance and 583.2 GTexel/s texture rate suggest it can handle Rust's environmental textures and lighting without bottlenecking the CPU at mainstream resolutions. However, the data shows the GPU's limits at 4K Ultra, where the average FPS drops to 34.2, indicating that the 7800 XT's 16 GB frame buffer and compute resources are being fully utilized by the game's most demanding preset.

Resolution Scaling

The measured FPS data reveals a clear scaling pattern across resolutions. At 1080p Low, the system achieves 204.9 FPS, which drops to 137.6 FPS at 1440p Low (a 32.8% reduction) and 80 FPS at 4K Low (a 41.9% reduction from 1440p). This scaling suggests the CPU is capable of feeding frames quickly at lower resolutions, but the GPU becomes the limiting factor as pixel count increases.

At High settings, the scaling is more linear: 117.3 FPS at 1080p, 78 FPS at 1440p (33.5% drop), and 47.3 FPS at 4K (39.4% drop). This consistent reduction across resolutions indicates a balanced system where both components contribute to performance, but the GPU's workload grows proportionally with pixel count.

The Ultra settings tell a different story: 84.8 FPS at 1080p drops to 57.3 FPS at 1440p (32.4% drop) and then to 34.2 FPS at 4K (40.3% drop). The 4K Ultra result of 34.2 FPS is below the playable threshold for most gamers, showing that this combo is not suited for maximum settings at 4K. The data suggests the sweet spot is 1440p with Medium or High settings, where the system maintains 95.5 and 78 FPS respectively, or 1080p with any settings for competitive play.

Measured FPS Breakdown

At 1920x1080, the system delivers its strongest performance across all settings. Low settings produce 204.9 FPS average, which is ideal for high-refresh-rate monitors. Medium settings reduce this to 138.1 FPS, still excellent for smooth gameplay. High settings yield 117.3 FPS, and Ultra settings drop to 84.8 FPS, which remains very playable for most users.

Moving to 2560x1440, the performance remains strong but shows the GPU's increasing workload. Low settings deliver 137.6 FPS, Medium settings reach 95.5 FPS, and High settings maintain 78 FPS. Ultra settings drop to 57.3 FPS, which is still smooth but noticeably lower than the 1080p results. The 1440p data suggests this resolution is the practical ceiling for high-refresh gaming with this combo.

At 3840x2160, performance becomes more constrained. Low settings produce 80 FPS, Medium settings drop to 54.3 FPS, and High settings reach 47.3 FPS. Ultra settings fall to 34.2 FPS, which is below the 60 FPS target most gamers prefer. The 4K results clearly show the GPU being pushed to its limits, with the gap between Low and Ultra settings (45.8 FPS) being the largest across all resolutions.

How This Combo Ranks

The combo's rank of 588 out of 1717 tested configurations places it in the 65.8th percentile, meaning it outperforms roughly two-thirds of all tested systems in Rust. This is a strong result for a mid-range pairing, especially considering the CPU's 82nd percentile ranking among all CPUs and the GPU's 76th percentile among all GPUs.

The ranking suggests the system is well-balanced for Rust's specific workload. The CPU's nearest rival, the AMD Ryzen 7 2700X, scores nearly identically (25057 vs 25064), but the 8400F achieves this with 6 cores and 12 threads compared to the older chip's 8 cores and 16 threads, indicating better per-core efficiency. The GPU's nearest rival, the AMD FirePro S9300 X2, scores 32540, which is 0.2% behind the 7800 XT's 32619.

This ranking indicates that the combo is neither CPU-bound nor GPU-bound in most scenarios, as evidenced by the smooth FPS scaling across resolutions. The 588th rank reflects a system that can handle Rust's demanding survival gameplay mechanics, which often involve complex physics and many simultaneous entity updates, without significant bottlenecks.

CPU Role

The AMD Ryzen 5 8400F features 6 cores and 12 threads based on the Zen 4 architecture, with a base clock of 4.20 GHz and boost clock of 4.70 GHz. Its 16 MB of shared L3 cache and 1 MB L2 cache per core provide fast access to frequently used game data. The CPU's 65 W TDP indicates efficient power usage while maintaining strong performance.

In synthetic benchmarks, the CPU shows robust multi-threaded performance with a Cinebench R23 multi-core score of 20851 and single-core score of 2943. The 3DMark tests show scaling from 951 in single-thread to 6165 in max-threads, representing a 6.5x improvement across its 12 threads. This scaling is important for Rust, which can utilize multiple cores for server-side simulation and entity processing.

The CPU's performance relative to its rivals is notable: it matches the AMD Ryzen 7 2700X's average score of 25057 despite having fewer cores, and it slightly edges out the AMD Ryzen 5 7500F at 24993. This suggests the Zen 4 architecture's IPC improvements compensate for the core count difference. The 4 nm process node and 25,000 million transistors indicate a modern design that balances performance and efficiency.

In the benchmark results, the CPU's role is most evident at 1080p Low settings, where the system achieves 204.9 FPS, suggesting the CPU can feed frames fast enough to avoid being a bottleneck at lower resolutions. However, at 4K Ultra, the 34.2 FPS result shows the GPU is the limiting factor, as the CPU's single-threaded score of 2943 in Cinebench R23 indicates it can handle the game's logic while the GPU struggles with the increased pixel workload.