Rust

Rust with the Intel Core i5-12400 and AMD Radeon RX 6800 XT produces a split-personality performance profile: the combination is far more capable at 1440p and 1080p than at 4K, where the GPU’s limits become the dominant constraint. At 1080p Low, the system reaches 203 FPS, showing strong headroom, but at 4K Ultra, it falls to 37 FPS, indicating that the RX 6800 XT, while powerful, cannot sustain high refresh rates at maximum resolution in this survival title. The data reveals a system that is well-balanced for mainstream high-refresh gaming but requires settings adjustments to achieve a smooth experience at 4K.

Resolution Scaling

The performance drop from 1080p to 4K is steep and consistent across all settings, clearly identifying the GPU as the limiting factor at higher resolutions. At Low settings, the average frame rate falls from 203 FPS at 1080p to 144 FPS at 1440p, a 29% reduction, and then to 85 FPS at 4K, a further 41% drop. This scaling pattern is typical of a GPU-bound scenario where the rendering load increases with pixel count, outpacing the CPU’s ability to feed frames.

For High settings, the decline is equally pronounced: 119 FPS at 1080p drops to 82 FPS at 1440p (-31%) and then to 48 FPS at 4K (-41%). The Ultra preset shows the most dramatic scaling, going from 90 FPS at 1080p to 62 FPS at 1440p (-31%) and bottoming out at 37 FPS at 4K (-40%). The consistent ~30% drop from 1080p to 1440p and ~40% drop from 1440p to 4K across all presets indicates that the RX 6800 XT’s raw pixel throughput, not CPU limitations, is the primary bottleneck as resolution increases.

Interestingly, the delta between Low and Ultra at each resolution is relatively consistent, suggesting that the GPU’s shading units and memory bandwidth are being taxed equally by the game’s visual features. At 4K, the gap between Low (85 FPS) and Ultra (37 FPS) is 48 FPS, which is substantial but not out of line with the GPU’s 20.74 TFLOPS FP32 performance. The data indicates that to maintain a playable frame rate at 4K, users must sacrifice significant visual fidelity, as even Medium settings only yield 57 FPS.

FAQ

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

A: Based on the measured data, 1440p offers the best balance of visual quality and performance. At High settings, the combo achieves 82 FPS, which is above the 60 FPS threshold, and at Low settings it hits 144 FPS, making it ideal for high-refresh monitors. While 1080p delivers higher frame rates, 1440p provides a more immersive experience without the severe performance penalties seen at 4K.

Q: How does the RX 6800 XT perform at 4K in Rust?

A: The data shows that 4K is demanding for this GPU in Rust. At Medium settings, the average frame rate is 57 FPS with a minimum of 49 FPS, which is borderline playable. High settings drop to 48 FPS, and Ultra falls to 37 FPS. Only at Low settings (85 FPS) does the system achieve a comfortable frame rate at 4K, indicating that the GPU’s 16 GB VRAM and 512.0 GB/s bandwidth are not sufficient for high-detail 4K gameplay in this title.

Q: Is the Intel Core i5-12400 a bottleneck for the RX 6800 XT in Rust?

A: The benchmark data suggests that the CPU is not a major bottleneck at most settings. The 6-core, 12-thread processor with a 4.40 GHz boost clock provides ample performance, as evidenced by the 203 FPS result at 1080p Low. However, at lower resolutions and settings where the GPU is less stressed, the CPU’s role becomes more significant, and its PassMark single-thread score of 3456 indicates it can handle high frame rate scenarios without holding back the GPU.

Q: What is the performance difference between Low and Ultra settings at 1440p?

A: At 1440p, the difference is substantial. Low settings produce 144 FPS, Medium yields 97 FPS, High drops to 82 FPS, and Ultra falls to 62 FPS. This represents a 57% performance reduction from Low to Ultra, showing that the visual upgrades in the Ultra preset come at a significant cost to frame rate.

Q: How does this combo rank among all tested systems for Rust?

A: The combination ranks 1152 out of 3723 tested systems, placing it in the top 31% of all configurations. This indicates that the i5-12400 and RX 6800 XT are a competent pairing for Rust, though not at the very top tier of performance.

Q: Which settings preset provides the most consistent frame rate?

A: The Medium preset shows the most consistent frame rates across all resolutions. At 1080p, it ranges from 119 to 162 FPS; at 1440p, from 82 to 111 FPS; and at 4K, from 49 to 66 FPS. This consistency suggests that Medium is a well-optimized preset for this hardware, avoiding the frame time spikes seen at higher settings.

CPU Role

The Intel Core i5-12400 brings a solid foundation for Rust, with its 6 cores and 12 threads operating at a base clock of 2.50 GHz and a boost clock of 4.40 GHz. This configuration provides a balanced mix of single-thread and multi-thread performance, which is crucial for Rust’s simulation and physics workloads. The CPU’s Cinebench R23 multi-core score of 15989 and single-core score of 2257 indicate strong processing capability, placing it in the 72nd percentile of all CPUs.

In the context of Rust’s measured FPS, the CPU’s influence is most apparent at 1080p Low settings, where the system achieves 203 FPS. This high frame rate suggests that the i5-12400 can keep up with the GPU’s output when the visual load is minimized. However, as resolution increases, the GPU becomes the primary bottleneck, and the CPU’s performance delta becomes less critical. The 12 threads allow for efficient handling of background tasks and game logic, preventing stutters that could affect minimum frame rates.

The CPU’s 18 MB of shared L3 cache and dual-channel memory support (DDR4 or DDR5) provide adequate bandwidth for feeding the RX 6800 XT. Benchmark results show that the i5-12400’s multi-threaded performance (PassMark 18747) is competitive with rivals like the AMD EPYC 7643 (deltaPct -0.1%) and Intel Core i7-1355U (deltaPct -0.3%), though slightly behind the AMD Ryzen AI 5 330 (deltaPct -0.7%). This places it in a strong position for gaming, where single-thread performance often matters more than raw core counts.

Measured FPS Breakdown

At 1920x1080, the system demonstrates excellent performance across all presets. Low settings yield an average of 203 FPS, Medium provides 140 FPS (with minimum 119 and maximum 162), High reaches 119 FPS, and Ultra maintains 90 FPS. This indicates that at 1080p, the combo can drive high-refresh monitors even at Ultra settings, though the jump from Low to Ultra represents a 56% reduction in frame rate.

Moving to 2560x1440, the frame rates remain respectable but show the expected decline. Low settings average 144 FPS, Medium averages 97 FPS (minimum 82, maximum 111), High averages 82 FPS, and Ultra drops to 62 FPS. The transition from 1080p to 1440p results in an average 30% performance loss across all settings, which is consistent with the increased pixel count. The 1440p Ultra result of 62 FPS is just above the 60 FPS mark, making it viable for gamers who prioritize visual fidelity over extreme refresh rates.

At 3840x2160, the GPU’s limitations become evident. Low settings produce 85 FPS, which is playable, but Medium drops to 57 FPS (minimum 49, maximum 66), High falls to 48 FPS, and Ultra bottoms out at 37 FPS. The delta between Low and Ultra at 4K is 48 FPS, similar to the delta at 1080p (113 FPS) and 1440p (82 FPS) in percentage terms, but the absolute values are too low for smooth gameplay at the higher settings. The 4K Medium result of 57 FPS is the only settings combination at this resolution that approaches acceptable playability without major compromises.

GPU Role

The AMD Radeon RX 6800 XT is the dominant component in this pairing, and its specifications directly explain the performance patterns observed. With 4608 shading units, 288 TMUs, and 128 ROPs, the GPU is capable of massive parallel processing, as evidenced by its 20.74 TFLOPS FP32 performance. The 16 GB of GDDR6 memory on a 256-bit bus provides 512.0 GB/s of bandwidth, which is sufficient for 1080p and 1440p gaming but becomes strained at 4K.

The GPU’s boost clock of 2250 MHz and game clock of 2015 MHz allow it to maintain high throughput in demanding scenes. The PassMark G3D score of 24980 places it in the 85th percentile of all GPUs, and its average benchmark score of 48477 is competitive with rivals like the NVIDIA RTX A1000 Mobile (deltaPct 1.5%) and Intel Arc A550M (deltaPct -2.5%). This performance level explains why the combo can achieve 203 FPS at 1080p Low but struggles at 4K Ultra.

The VRAM capacity of 16 GB is ample for Rust’s texture and asset streaming, but the bandwidth constraint becomes apparent at higher resolutions. The pixel rate of 288.0 GPixel/s and texture rate of 648.0 GTexel/s are impressive, yet they are insufficient to maintain high frame rates at 4K with Ultra settings. The data suggests that the GPU is the primary reason for the 37 FPS result at 4K Ultra, as the CPU has demonstrated it can feed frames at much higher rates at lower resolutions.

Settings Recommendations

For 1080p gaming, the High preset offers the best balance, delivering 119 FPS while maintaining visual quality. Ultra is also viable at 90 FPS, though the marginal visual gains may not justify the 24% performance loss compared to High. For competitive play, Low at 203 FPS provides the highest possible refresh rate, but the visual downgrade is significant.

At 1440p, the High preset is the recommended choice, achieving 82 FPS and providing a smooth experience on 144Hz monitors. Medium (97 FPS) is a strong alternative for those who prefer higher frame rates, while Ultra (62 FPS) remains playable but leaves little headroom for frame drops in busy scenes. Low (144 FPS) is only recommended for esports-style play where maximum responsiveness is prioritized.

For 4K, the data strongly suggests that Medium (57 FPS) is the highest preset that maintains acceptable playability. High (48 FPS) and Ultra (37 FPS) are too choppy for most users, and Low (85 FPS) sacrifices too much visual fidelity. The Medium preset’s minimum of 49 FPS indicates that even this setting may experience occasional stutters, so users with variable refresh rate monitors will benefit most. Given the GPU’s 16 GB VRAM and 512.0 GB/s bandwidth, the 4K Medium result of 57 FPS represents the practical ceiling for this combo in Rust without external upscaling.