Rust

The Intel Core i5-12400F paired with the AMD Radeon RX 7900 XTX delivers a consistently playable experience in Rust, but the data reveals that this combination is heavily constrained by the graphics card at higher resolutions, while the CPU becomes a more significant factor at 1080p. The measured frame rates show a clear pattern: this combo is best suited for high-refresh-rate 1440p gaming, where it comfortably exceeds 90 FPS on High settings, but it struggles to maintain smooth performance at 4K Ultra, where the average drops to just 48.3 FPS.

Resolution Scaling

The performance trajectory from 1080p to 4K clearly indicates where the bottleneck lies in this system. At 1920x1080 with High settings, the combo produces 150.9 FPS, but moving to 2560x1440 drops that to 99.3 FPS, a reduction of 51.6 FPS. The scaling continues at 3840x2160, where the average falls to 61.8 FPS, meaning the jump from 1440p to 4K alone costs another 37.5 FPS. This aggressive decline across resolution steps—roughly a 34% loss from 1080p to 1440p and another 38% from 1440p to 4K—points directly to the GPU as the limiting component at higher pixel counts.

However, the scaling pattern changes dramatically when looking at Low settings. At 1080p Low, the combo reaches 203.7 FPS, which drops to 179.3 FPS at 1440p and then plummets to 107.1 FPS at 4K. The relatively small gap between 1080p and 1440p Low (24.4 FPS) compared to the massive 72.2 FPS drop from 1440p to 4K suggests that at lower settings, the CPU begins to cap performance at 1080p and 1440p, while the GPU workload still dominates at 4K. The data shows that at 1080p Low, the system is likely CPU-limited, as the RX 7900 XTX is capable of far higher frame rates in less demanding scenarios.

GPU Role

The Radeon RX 7900 XTX brings substantial resources to Rust, including 24 GB of GDDR6 memory on a 384-bit bus, yielding 960.0 GB/s of bandwidth. Its boost clock of 2498 MHz and game clock of 2365 MHz provide the raw throughput needed for demanding scenes. The GPU's 6144 shading units and 192 ROPs are directly relevant to Rust's rendering workload, and the data confirms that at 4K Ultra, the card is fully taxed, producing just 48.3 FPS. The memory configuration is particularly important here—Rust is known for large, dense worlds, and the 24 GB frame buffer ensures that texture streaming and asset loading never become a limiting factor at any resolution tested.

The GPU's benchmark scores support its strong showing in the measured results. A PassMark G3D score of 31238 and a 3DMark Steel Nomad DX12 score of 6841 place it in the 85th percentile of all GPUs. The nearest rival data shows it trading blows with the NVIDIA GeForce RTX 4070 Ti, which scores 44900 on average, a 2% delta, and the RTX 4090 Mobile at 43667, a 0.8% delta. This positioning explains why the combo can push 203.7 FPS at 1080p Low—the GPU has ample headroom, and the actual bottleneck shifts to the CPU at lower resolutions and settings.

Settings Recommendations

For 4K gaming, the data strongly favors Medium settings over High or Ultra. At 3840x2160, Medium yields 69 FPS, which is 7.2 FPS higher than High (61.8 FPS) and a massive 20.7 FPS higher than Ultra (48.3 FPS). The jump from Ultra to Medium represents a 43% performance improvement, making Medium the only playable preset at this resolution for smooth gameplay. High at 4K is borderline, but Medium provides the best balance of visual fidelity and frame rate.

At 1440p, High settings deliver 99.3 FPS, which is the recommended choice for most players. The jump to Medium increases performance to 122.6 FPS, a 23.3 FPS gain, but the visual difference between High and Medium is noticeable in Rust's detailed environments. Ultra at 1440p drops to 75.9 FPS, which is still playable but sacrifices the smoothness that High provides. For competitive play at 1440p, Low settings at 179.3 FPS offer the highest refresh rate potential, though this comes at a significant visual cost.

At 1080p, the choice depends on the display's refresh rate. High settings at 150.9 FPS will satisfy most 144Hz monitors, while Medium at 177.6 FPS and Low at 203.7 FPS cater to 165Hz and 240Hz panels respectively. Ultra at 113.3 FPS is the only preset that dips below 120 FPS, making it less ideal for high-refresh displays.

Measured FPS Breakdown

The complete dataset reveals a comprehensive picture of performance across all resolution and settings combinations. At 1920x1080, the averages range from 113.3 FPS on Ultra to 203.7 FPS on Low, with Medium hitting 177.6 FPS and High at 150.9 FPS. This spread of 90.4 FPS between the lowest and highest settings shows that Rust's settings have a substantial impact on frame rates at this resolution.

Moving to 2560x1440, the range narrows but remains significant. Low produces 179.3 FPS, Medium 122.6 FPS, High 99.3 FPS, and Ultra 75.9 FPS. The gap between Low and Ultra here is 103.4 FPS, indicating that the GPU is becoming more of a factor, though the CPU still influences the Low setting result.

At 3840x2160, the performance envelope compresses further. Low averages 107.1 FPS, Medium 69 FPS, High 61.8 FPS, and Ultra 48.3 FPS. The difference between Low and Ultra is 58.8 FPS, and notably, the gap between Medium and High is just 7.2 FPS, suggesting diminishing returns from Medium to High at this resolution. The data indicates that 4K is the most demanding scenario, with even Low settings not reaching the 144 FPS mark that high-refresh 4K monitors would require.

FAQ

Q: Is the RX 7900 XTX capable of running Rust at 4K?

A: Yes, but only at Medium settings, which produces an average of 69 FPS. High settings drop to 61.8 FPS, and Ultra falls to 48.3 FPS, making Medium the recommended preset for 4K play.

Q: What is the best resolution for this combo?

A: 2560x1440 on High settings, which delivers 99.3 FPS. This provides a strong balance between visual quality and frame rate, comfortably above 60 FPS and close to 100 FPS for smoother gameplay.

Q: How does the CPU affect performance at 1080p?

A: The data shows that at 1080p Low, the combo reaches 203.7 FPS, but the scaling from 1080p to 1440p at Low settings is only a 24.4 FPS drop, suggesting the i5-12400F limits performance at lower resolutions before the GPU becomes the constraint.

Q: What is the frame rate difference between High and Ultra at 1440p?

A: High settings average 99.3 FPS, while Ultra averages 75.9 FPS, a difference of 23.4 FPS. This makes High clearly preferable for maintaining higher frame rates at 1440p.

Q: Does the combo perform better at 1080p Ultra or 1440p High?

A: 1080p Ultra averages 113.3 FPS, which is 14 FPS higher than 1440p High at 99.3 FPS. The higher resolution at High settings provides better visual fidelity, but the frame rate trade-off is significant.

Q: What is the lowest frame rate recorded for this combo?

A: The lowest average is 48.3 FPS at 3840x2160 on Ultra settings. This is the only configuration tested that falls below 60 FPS, making it unsuitable for smooth gameplay.

CPU Role

The Intel Core i5-12400F provides 6 cores and 12 threads, with a base clock of 2.50 GHz and a boost clock of 4.40 GHz. Its 18 MB of shared L3 cache and 1.25 MB per-core L2 cache are relevant for Rust's complex worlds, which require frequent asset lookups. The CPU's benchmark scores show it performing at the 77th percentile of all CPUs, with a Cinebench R23 multicore score of 16518 and a single-core score of 2332. The PassMark multithread score of 19433 and single-thread score of 3481 further indicate a capable mid-range processor.

The nearest rival data places the i5-12400F within 0.1% of the Intel Core i7-8700K (19210 avg score) and 0.3% of the Intel Core i5-1335U (19167), while trailing the AMD Ryzen 5 7533HS by 0.7% (19364). This positioning suggests the CPU is competitive, but the measured FPS data reveals its limitations. At 1080p Low, the combo reaches 203.7 FPS, which is likely near the CPU's maximum frame output in Rust. The fact that 1440p Low only drops to 179.3 FPS—a 24.4 FPS decrease—indicates that the CPU is still a factor at this resolution, whereas the larger 72.2 FPS drop from 1440p Low to 4K Low shows the GPU taking over as the primary bottleneck.

How This Combo Ranks

In the database of tested combinations, this pairing of the Intel Core i5-12400F and AMD Radeon RX 7900 XTX ranks 213 out of 1717 total combos for Rust. This places it in the top 12.4% of all tested configurations, which is a strong showing given the mid-range CPU choice. The high GPU percentile (85th) combined with the solid CPU performance (77th percentile) explains why this combo outperforms the vast majority of alternatives, even though the CPU is not a top-tier model.

The ranking reflects the measured FPS data, which shows the combo delivering playable frame rates across most settings and resolutions. The only significant weakness is 4K Ultra, where the 48.3 FPS average falls below playable thresholds. However, for the majority of users targeting 1080p or 1440p, this combo provides excellent performance, with the 1440p High result of 99.3 FPS being particularly strong for its rank. The data indicates that users could achieve even higher rankings by pairing the RX 7900 XTX with a more powerful CPU, but the i5-12400F does not hold the system back meaningfully except in the lowest-settings, highest-frame-rate scenarios.