Rust

The AMD Ryzen 5 8400F paired with the NVIDIA GeForce RTX 4080 presents an interesting asymmetry: a 6-core Zen 4 desktop CPU mated to a high-end Ada Lovelace GPU. In Rust, this combination delivers strong frame rates across most tested configurations, though the game’s demands at 4K Ultra push the system to its limit. The data below breaks down exactly where this combo excels and where it falls short.

FAQ

Q: What is the best playable preset at 3840x2160 for this combo?

A: The High preset is the most demanding playable setting at 4K, producing an average of 66 FPS. The Ultra preset drops below the 60 FPS threshold with an average of 50 FPS, making it unplayable at this resolution.

Q: Can this system maintain 60 FPS at 2560x1440 on Ultra settings?

A: Yes. At 1440p, the Ultra preset clears the 60 FPS threshold comfortably, with an average of 85 FPS. All four presets (Low, Medium, High, Ultra) are playable at this resolution.

Q: How much faster is Low versus Ultra at 1920x1080?

A: The Low preset averages 216 FPS, while Ultra averages 124 FPS. This represents a 92 FPS gap, meaning the Ultra setting runs at roughly 57% of the Low preset’s frame rate.

Q: Does the CPU or GPU bottleneck more at higher resolutions?

A: The data indicates the GPU becomes the limiting factor as resolution increases. At 1080p Low, the system reaches 216 FPS, but at 4K Low, it falls to 117 FPS — a 99 FPS drop that reflects the GPU’s workload scaling with pixel count.

Q: What is the combo’s overall ranking among tested systems?

A: This CPU-GPU pairing ranks 275th out of 3723 tested combos in Rust, placing it in the top 7.4% of all configurations in the database.

Q: Is the RTX 4080’s performance close to any other GPUs?

A: The nearest rival is the NVIDIA GeForce RTX 4080 SUPER, with an average benchmark score 0.1% higher. The AMD Radeon Pro W5700X scores 1.1% higher, while the AMD Radeon RX 6750 GRE 12 GB trails by 2.6%.

CPU and GPU Roles

The performance scaling across resolutions and presets reveals a clear division of labor between the AMD Ryzen 5 8400F and the GeForce RTX 4080. At 1920x1080, the system demonstrates a pronounced CPU-driven ceiling. The Low preset achieves 216 FPS, which is the highest frame rate recorded in the entire dataset. This suggests the CPU is capable of feeding the GPU at lower resolution, but the gap between Low and Ultra at 1080p — 216 FPS versus 124 FPS — indicates that the GPU’s rendering workload still has substantial headroom. The CPU’s 6 cores and 12 threads, with a boost clock of 4.70 GHz, appear sufficient to avoid becoming a hard bottleneck at this resolution.

Moving to 2560x1440, the balance shifts. The Low preset drops from 216 FPS to 191 FPS, a 25 FPS reduction, while Ultra falls from 124 FPS to 85 FPS, a 39 FPS reduction. The larger absolute drop at Ultra suggests the GPU is now doing more work per frame, but the CPU still keeps the system well above 60 FPS at every preset. The Medium preset at 1440p shows a tighter min-max spread (113-153 FPS) compared to 1080p Medium (158-214 FPS), indicating that the GPU is starting to stress under higher pixel counts.

At 3840x2160, the GPU becomes the dominant constraint. The Low preset falls to 117 FPS, which is still playable, but the progression from Low (117 FPS) to Medium (79 FPS) to High (66 FPS) to Ultra (50 FPS) shows the RTX 4080’s limits being reached. The 4K Ultra result of 50 FPS is the only unplayable configuration in the dataset, confirming that the GPU’s 16 GB of GDDR6X memory and 716.8 GB/s bandwidth cannot sustain the highest visual fidelity at this resolution. The CPU’s role diminishes here; the Ryzen 5 8400F’s single-thread score of 951 in 3dmark single-thread and 2943 in Cinebench R23 single-core are sufficient to avoid holding back the GPU at 4K.

The pattern across all resolutions confirms that Rust scales heavily with GPU load. At 1080p, CPU headroom exists, as evidenced by the 92 FPS difference between Low and Ultra. At 4K, the GPU saturates, and the CPU becomes less relevant to the final frame rate. For players prioritizing high refresh rates at 1080p, the CPU matters more; for 4K enthusiasts, the GPU dictates the playable preset.

Similar Performance Alternatives

The CPU’s nearest rivals in the database provide context for its performance in this system. The AMD Ryzen 5 7500F is the closest match, with an average benchmark score of 24964 versus the 8400F’s 25005, a delta of just 0.2%. In Rust, this means the 7500F would produce nearly identical frame rates at all resolutions and presets, as the 8400F’s 6 cores and 12 threads are the determining factor. The Intel Core i7-11850H and Intel Core i7-13620H also fall within 0.4% of the 8400F’s score, suggesting that mobile-derived Intel parts with similar thread counts would behave comparably in this game. The AMD EPYC 9474F scores 0.4% higher, but its server-oriented design makes it an unlikely real-world alternative for gaming.

On the GPU side, the RTX 4080’s nearest rival is the RTX 4080 SUPER, which scores 54209 versus 54247, a delta of 0.1%. In practical terms, the SUPER would deliver essentially identical FPS in Rust — the 1-2 FPS difference at any given preset would be imperceptible. The AMD Radeon Pro W5700X scores 1.1% higher, which could translate to a few extra frames at 4K, but its workstation pedigree and different driver optimization may change real-world behavior. The AMD Radeon RX 6750 GRE 12 GB trails by 2.6%, meaning it would likely fall short of the 4080’s 4K High performance of 66 FPS, possibly landing below the 60 FPS threshold at that preset.

For users considering alternatives, swapping the CPU to a Ryzen 5 7500F would yield no meaningful change in Rust performance. Upgrading the GPU to an RTX 4080 SUPER would provide a negligible boost, while a downgrade to an RX 6750 GRE would risk dropping below 60 FPS at 4K High. The data shows this combination sits in a performance band where small benchmark differences do not alter the playable settings at any resolution.

The Verdict

The verdict by resolution is clear: this system runs Rust successfully at all three tested resolutions, but with one caveat at 4K Ultra. At 1920x1080, every preset from Low to Ultra averages above 60 FPS, with Ultra hitting 124 FPS. This makes the system fully playable at 1080p with maximum settings, and the 216 FPS Low preset indicates headroom for high-refresh-rate monitors. At 2560x1440, all four presets also clear 60 FPS, with Ultra averaging 85 FPS. This is the sweet spot for this combo — the visual fidelity of Ultra is maintained while still leaving a comfortable margin above the playable threshold.

At 3840x2160, the system remains playable on High (66 FPS), Medium (79 FPS), and Low (117 FPS), but Ultra falls to 50 FPS, which is below the 60 FPS threshold. This means 4K users must choose between High and Ultra. The High preset’s 66 FPS average is playable but close to the threshold, so players expecting stable 60 FPS minimums should note that the Medium preset offers a safer 79 FPS average with a documented minimum of 67 FPS. The data does not include min/max values for High or Ultra at 4K, but the Medium preset’s 67 FPS minimum suggests that High could dip below 60 FPS during heavy scenes.

Overall, the verdict is positive: the combo runs Rust at playable frame rates at 1080p and 1440p with maximum settings, and at 4K with High settings. The only unplayable configuration is 4K Ultra, which requires a more powerful GPU or a reduction in settings.

How This Combo Ranks

Among 3723 tested CPU-GPU combinations in Rust, this pairing ranks 275th. This places it in the top 7.4% of all configurations, which is a strong result given the CPU’s mid-range positioning. The rank reflects the RTX 4080’s substantial contribution; the GPU’s percentileVsAllGpus of 86 (meaning it outperforms 86% of all GPUs) is the primary driver of the high placement. The CPU’s percentileVsAllCpus of 77 is lower, but the 8400F does not drag down the overall result in Rust, as the game appears more GPU-bound at higher resolutions.

The rank of 275 suggests that the combo outperforms the vast majority of tested systems, but it is not at the absolute top. Systems with faster CPUs, such as those with higher single-thread scores, would rank higher at 1080p where the CPU matters more. However, at 4K, the GPU dominates, and the 8400F’s 6-core design is sufficient to stay competitive. For context, the combo sits well above the median, and the measured FPS data confirms that it handles Rust’s most demanding settings at 1440p and below without issue.

Best Settings per Resolution

At 1920x1080, the best settings are Ultra, which produces an average of 124 FPS. This is the most demanding preset and it still clears the 60 FPS threshold by a wide margin. At 2560x1440, Ultra is also the best choice, with an average of 85 FPS. This provides a good balance between visual quality and performance, with enough headroom to absorb frame drops. At 3840x2160, the best settings are High, which averages 66 FPS. While Ultra is not playable (50 FPS), High stays above 60 FPS, making it the highest quality preset that meets the playable threshold. Players who prefer a smoother experience at 4K could opt for Medium (79 FPS), but High is the most demanding playable option.

Measured FPS Breakdown

1920x1080:

• Low: avg 216 FPS
• Medium: avg 186 FPS, min 158 FPS, max 214 FPS
• High: avg 163 FPS
• Ultra: avg 124 FPS

At 1080p, the system delivers exceptional performance. The Low preset’s 216 FPS average is the highest in the entire dataset, and even Ultra maintains 124 FPS. The Medium preset’s min-max range of 158-214 FPS shows consistent frame delivery, with the minimum still far above the 60 FPS threshold.

2560x1440:

• Low: avg 191 FPS
• Medium: avg 133 FPS, min 113 FPS, max 153 FPS
• High: avg 112 FPS
• Ultra: avg 85 FPS

At 1440p, performance remains strong. The Low preset drops to 191 FPS, still well above 60 FPS. The Medium preset’s minimum of 113 FPS is comfortable, and Ultra’s 85 FPS average provides a solid experience for high-fidelity gaming. The frame range at Medium (113-153 FPS) narrows compared to 1080p, reflecting the increased GPU load.

3840x2160:

• Low: avg 117 FPS
• Medium: avg 79 FPS, min 67 FPS, max 90 FPS
• High: avg 66 FPS
• Ultra: avg 50 FPS

At 4K, the GPU’s limits become apparent. Low still delivers 117 FPS, but the progression to Ultra shows a steep drop. The Medium preset’s minimum of 67 FPS is just above the 60 FPS threshold, while High’s 66 FPS average offers no documented min/max data, leaving the potential for dips below 60 FPS. Ultra’s 50 FPS is the only unplayable result, confirming that the RTX 4080 cannot sustain the highest settings at 4K in Rust.