Rust

The AMD Ryzen 5 8400F paired with the AMD Radeon RX 570 lands at rank 3553 out of 3723 tested combos in Rust. That places this configuration in the bottom 5% of all tested systems, a position that reflects a fundamental mismatch between the game's demands and what this hardware delivers. The data shows a combo that can produce playable frame rates only at 1080p with reduced settings, and even then, the experience is fragile. This is not a pairing for smooth high-refresh gameplay or for pushing visual fidelity; it is a baseline setup that prioritizes function over form.

How This Combo Ranks

The combo's rank of 3553 out of 3723 is a clear signal. In Rust, a game known for its demanding rendering and simulation load, this pairing sits near the very bottom of the performance ladder. Benchmark results indicate that roughly 95% of tested combinations outperform it. The ranking is not a reflection of a single weak component; rather, it is the product of both the CPU and GPU being positioned at the lower end of the performance spectrum, with the GPU being the primary bottleneck in most scenarios.

To contextualize this rank, consider that the CPU alone holds a percentile of 77 among all tested processors, placing it in the upper quarter. The GPU, however, holds a percentile of 74 among all tested graphics cards. When combined, these mid-pack components do not synergize well for Rust; the game's engine appears to amplify the GPU's weaknesses more than it leverages the CPU's strengths. The result is a combo that ranks far lower than the individual component percentiles might suggest. The delta between the CPU's strong standing and the combo's poor rank underscores that in this game, the graphics card is the deciding factor.

GPU Role

The AMD Radeon RX 570 is the anchor of this combo's performance, and not in a flattering way. It features 4 GB of GDDR5 memory on a 256-bit bus, providing a bandwidth of 224.0 GB/s. The card's base clock is 1168 MHz with a boost clock of 1244 MHz, and it offers 2048 shading units. These specifications translate to a pixel rate of 39.81 GPixel/s and a texture rate of 159.2 GTexel/s, which are modest figures by modern standards.

In Rust, the GPU's role is critical, and the data shows it struggles. The 4 GB VRAM capacity is a particularly limiting factor. Rust's large, open-world environments and complex base-building mechanics require significant texture memory. At higher resolutions and settings, the card likely runs into VRAM limitations, causing stutters and forcing the system to swap data, which tanks frame rates. The measured FPS data supports this: at 4K High, the average FPS is 15, which is unplayable. Even at 1080p Ultra, the average drops to 29 FPS. The GPU's GCN 4.0 architecture, while supporting DirectX 12 (12_0), Vulkan 1.3, and OpenGL 4.6, is simply outclassed by the demands of modern Rust builds.

The GPU's benchmark scores reinforce its position. Its average benchmark score is 28766, and it sits at percentile 74. Its nearest rivals include the AMD Radeon RX 6800M with a delta of -0.4% and the AMD Radeon RX 470 with a delta of -0.8%. Notably, the RX 470 is nearly identical in performance, which suggests that the RX 570 offers no meaningful generational leap for this workload. The card is end-of-life, and its performance profile reflects its age. For Rust, this GPU is the limiting factor in almost every configuration tested, from 1080p Low to 4K Ultra.

CPU Role

The AMD Ryzen 5 8400F is a 6-core, 12-thread processor based on the Zen 4 architecture, codenamed Phoenix. It has a base clock of 4.20 GHz and a boost clock of 4.70 GHz, with a 65 W TDP. It supports DDR5 memory in a dual-channel configuration, offering a memory bandwidth of 83.2 GB/s. This CPU is built on a 4 nm process at TSMC, and it shows in its single-threaded performance, scoring 2943 in Cinebench R23 single-core and 951 in 3DMark single-thread tests.

In Rust, the CPU handles the game's simulation and physics, which are known to be single-thread dependent. The 8400F's strong single-core performance is a boon here. Its 3DMark single-thread score of 951 and Cinebench R15 single-core score of 296 indicate it can process the game's logic quickly. However, the game's multi-threaded scaling is less efficient. The CPU's multi-core scores are respectable—20851 in Cinebench R23—but they do not translate into high FPS in Rust because the GPU cannot keep up. The CPU is rarely the bottleneck; it is waiting on the GPU.

The CPU's nearest rivals show how close it is to other mid-range options. The AMD Ryzen 5 7500F has a delta of 0.2%, and the Intel Core i7-13620H has a delta of 0.4%. This means the 8400F is statistically tied with these processors in average benchmark score. In the context of this combo, the CPU's capability is largely wasted. A less powerful CPU would likely produce nearly identical FPS results because the GPU is so constrained. The CPU's high percentile rank of 77 suggests it is a capable component, but in this pairing, it is held back by the graphics card.

Measured FPS Breakdown

The measured FPS data reveals a consistent pattern: performance degrades sharply as resolution and settings increase. At 1080p Low, the combo achieves an average of 66 FPS, which is the only fully playable result in the entire dataset. This is likely the target configuration for anyone using this hardware. Moving up to 1080p Medium, the average drops to 44 FPS, with a minimum of 38 and a maximum of 51. This is borderline playable, but dips below 40 FPS will be noticeable in a survival game where split-second reactions matter.

At 1080p High, the average is 38 FPS, and at 1080p Ultra, it falls to 29 FPS. Neither of these is smooth, and the Ultra setting is particularly poor, losing more than half the FPS of the Low setting. The trend continues at 1440p. At 1440p Low, the average is 46 FPS, which is playable but far from ideal. At 1440p Medium, the average is 31 FPS with a minimum of 26, which will feel choppy. 1440p High averages 26 FPS, and 1440p Ultra drops to 20 FPS. These numbers indicate that 1440p is only feasible with Low settings, and even then, the experience is marginal.

At 4K, the results are mostly academic. 4K Low averages 27 FPS, 4K Medium averages 18 FPS with a range of 15 to 21, 4K High averages 15 FPS, and 4K Ultra averages 12 FPS. None of these are playable in a competitive sense. The data shows that the step from 1080p to 1440p halves the performance at comparable settings, and the step to 4K halves it again. This is a GPU-bound scenario, where the RX 570's 4 GB of VRAM and limited compute power are overwhelmed. The only configuration that offers a smooth experience is 1080p Low, and even that might have occasional dips, as the minimum FPS data is not available for that setting.

Resolution Scaling

The FPS drop from 1080p to 4K is steep and consistent, confirming that the GPU is the limiting factor. At Low settings, the average FPS goes from 66 at 1080p to 46 at 1440p, a reduction of approximately 30%. From 1440p to 4K Low, it drops from 46 to 27, a reduction of about 41%. At High settings, the drop is even more severe: from 38 FPS at 1080p to 26 FPS at 1440p (a 32% decrease), and then to 15 FPS at 4K (a 42% decrease). This scaling pattern is typical of a GPU that is running out of memory bandwidth and fill rate.

The fact that the FPS does not scale linearly with the number of pixels suggests that the GPU is not just fill-rate limited but also memory-bandwidth limited. The RX 570's 224.0 GB/s bandwidth is insufficient for the data demands of 4K in Rust. The CPU's role in this scaling is minimal; if the CPU were the bottleneck, the FPS would remain relatively flat across resolutions. Instead, the FPS drops dramatically, indicating that the graphics card is saturated. For a user on a 1080p monitor, the path forward is clear: stick to Low settings. For any higher resolution, this combo will not deliver a playable experience without substantial setting reductions that would make the game visually unappealing.

FAQ

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

A: The data shows that the only configuration achieving a consistently playable frame rate is 1920x1080 with Low settings, which averages 66 FPS. At 1080p Medium, the average drops to 44 FPS, which may be acceptable but is less stable.

Q: Can this combo handle 1440p gaming in Rust?

A: Marginal at best. At 1440p Low, the average FPS is 46, which is playable but not smooth. At 1440p Medium, the average drops to 31 FPS, and at High or Ultra, it falls below 30 FPS, making it unplayable for most users.

Q: Is the CPU or GPU the main bottleneck in this system?

A: The GPU is clearly the limiting component. The CPU has a percentile rank of 77, while the combo ranks 3553 out of 3723. The FPS drops significantly with resolution increases, which indicates GPU saturation, not CPU limitation.

Q: How does the CPU compare to its nearest rivals?

A: The AMD Ryzen 5 8400F is statistically tied with the AMD Ryzen 5 7500F (0.2% delta) and the Intel Core i7-13620H (0.4% delta) in average benchmark scores. It is also only 0.4% behind the AMD EPYC 9474F.

Q: How does the GPU compare to its nearest rivals?

A: The AMD Radeon RX 570 is nearly identical in performance to the AMD Radeon RX 470, with a delta of -0.8%. It is also within 1.2% of the NVIDIA Quadro RTX 8000, indicating a wide range of cards offer similar baseline performance.

Q: Is 4K gaming possible with this hardware?

A: No. The highest average FPS at 4K is 27 at Low settings, which is unplayable. At Ultra settings, the average drops to 12 FPS. The 4 GB VRAM and limited compute power make 4K impractical for Rust.