Rust

The AMD Ryzen 5 8400F and AMD Radeon RX 7700 combination delivers a playable, though not exceptional, Rust experience, with performance heavily dictated by resolution and graphical preset. The data shows a system that excels at 1080p and 1440p gaming but struggles to maintain smooth frame rates at 4K, particularly when settings are pushed to their maximum. This pairing represents a mid-range setup that favors high-refresh-rate monitors at lower resolutions over demanding 4K ultra settings.

Resolution Scaling

The measured frames per second reveal a clear and predictable scaling pattern as resolution increases, indicating that the GPU becomes the primary bottleneck at higher pixel counts. At 1080p with Low settings, the combo achieves an average of 173 FPS, which drops to 119 FPS at 1440p and further to 70 FPS at 4K. This represents a 31% performance hit when moving from 1080p to 1440p, and a further 41% decline when stepping up to 4K, demonstrating that the RX 7700's rendering load grows substantially with each resolution tier.

The scaling behavior shifts depending on the quality preset. With High settings, the frame rate drops from 98 FPS at 1080p to 67 FPS at 1440p (a 32% reduction) and then to 40 FPS at 4K (a 40% reduction from 1440p). This consistent pattern across presets suggests that the GPU's memory bandwidth and compute resources are being saturated similarly regardless of the visual complexity, which points to a balanced workload between the CPU and GPU at lower resolutions and a GPU-limited scenario at 4K.

At Ultra settings, the performance degradation becomes even more pronounced. The system manages 75 FPS at 1080p, 51 FPS at 1440p, and only 30 FPS at 4K. The 4K Ultra result is particularly telling, as it falls below the 30 FPS threshold that many consider the minimum for a playable experience, indicating that this combination is not suitable for 4K gaming at maximum quality. The scaling from 1440p to 4K at Ultra shows a 41% drop, which mirrors the pattern seen at other settings, reinforcing that the GPU is the limiting factor at this resolution.

Interestingly, the gap between Low and Ultra settings widens as resolution increases. At 1080p, the difference between Low and Ultra is 98 FPS (173 versus 75), while at 4K that gap narrows to 40 FPS (70 versus 30). This compression at higher resolutions suggests that the GPU is hitting a hard computational ceiling regardless of the quality settings, which is characteristic of a graphics card that is overwhelmed by pixel count rather than shader complexity.

How This Combo Ranks

The combination ranks 1295 out of 2953 tested combos for Rust, placing it in the 56th percentile of all systems evaluated. This mid-pack positioning indicates that while the Ryzen 5 8400F and RX 7700 are not a top-tier pairing, they outperform a majority of the tested configurations, which is respectable for a system built around a 6-core processor and a 16 GB graphics card.

The CPU itself sits in the 77th percentile when compared against all processors, with an average benchmark score of 25005. Its nearest rival, the AMD Ryzen 5 7500F, scores 24964, a delta of just 0.2%, meaning the 8400F and 7500F are effectively identical in raw processing power. The Intel Core i7-11850H and Core i7-13620H also sit extremely close, with deltas of 0.3% and 0.4% respectively, while the AMD EPYC 9474F is 0.4% ahead. This clustering suggests that the CPU's performance is well within the expected range for its class, and it is not a significant differentiator in this combo's overall ranking.

The GPU's percentile ranking is notably lower at 58, with an average benchmark score of 15852. Its nearest rival, the AMD Radeon R9 370X, scores 15862, a delta of -0.1%, while the AMD Radeon RX 9060 is 1% ahead and the NVIDIA GeForce RTX 3060 Ti is 1.7% ahead. The AMD Radeon Pro W5500 trails by 1.1%. This tight grouping around the 15800-16000 score range indicates that the RX 7700 is performing at the level of its direct competitors, but it does not have the headroom to push the combo into a higher ranking tier.

The disparity between the CPU's 77th percentile and the GPU's 58th percentile suggests that the graphics card is the limiting factor in this system's overall Rust ranking. The data indicates that pairing the 8400F with a more powerful GPU would likely yield a better combo rank, as the processor has demonstrated it can keep pace with faster rivals in synthetic benchmarks.

GPU Role

The AMD Radeon RX 7700 is built on the RDNA 3.0 architecture with the Navi 32 chip, manufactured on a 5 nm process at TSMC. It features 16 GB of GDDR6 memory on a 256-bit bus, providing 624.1 GB/s of bandwidth, which is substantial for a card in this class. The GPU's base clock is 1900 MHz, with a boost clock of 2459 MHz and a game clock of 2041 MHz, while the memory runs at 2438 MHz with an effective speed of 19.5 Gbps.

The card's 2560 shading units, 160 texture mapping units, and 96 render output units drive a pixel rate of 236.1 GPixel/s and a texture rate of 393.4 GTexel/s. Its FP32 performance of 25.18 TFLOPS indicates a solid compute capability for modern games like Rust, which relies heavily on draw calls and texture streaming. The 40 ray tracing cores provide some future-proofing, though Rust does not currently leverage ray tracing in its rendering pipeline.

The 16 GB VRAM capacity is particularly relevant for Rust, as the game is known for aggressive memory usage due to its large open-world environment and numerous entity interactions. The measured data shows that the GPU's bandwidth is sufficient for 1080p and 1440p gaming, but at 4K Ultra, the 30 FPS average suggests the card's compute units are fully saturated. The boost clock of 2459 MHz is competitive for the RDNA 3 generation, and the gap between base and boost clocks allows for good thermal management under sustained loads.

The GPU's PCIe 4.0 x16 interface provides ample bandwidth for data transfer from the CPU, and its 200 W TDP is modest for the performance delivered. The card's dual-slot design and dual 8-pin power connectors are standard for this class, and the suggested 550 W PSU indicates it is not overly power-hungry. The display outputs include 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C, which offers flexible connectivity for various monitor setups.

Measured FPS Breakdown

At 1920x1080, the combo delivers its strongest performance. With Low settings, the average FPS is 173, which is exceptionally high and well-suited for competitive play on high-refresh-rate monitors. Medium settings drop the average to 116 FPS, with a minimum of 99 and a maximum of 133, indicating a stable experience. High settings yield 98 FPS on average, while Ultra settings bring the average down to 75 FPS, which is still playable but begins to show the GPU's limits. The 1080p results show a clear progression where each tier of graphical quality costs approximately 20-25% of the frame rate.

At 2560x1440, the performance scales downward as expected. Low settings average 119 FPS, which is a 31% drop from 1080p Low, but still very playable. Medium settings average 80 FPS, with a range between 68 and 92 FPS, showing some variance that could be noticeable in fast-paced scenarios. High settings average 67 FPS, which is adequate for most players, while Ultra settings fall to 51 FPS on average. The 1440p results indicate that Medium is the sweet spot for balancing visual quality and smoothness, as the drop from Medium to High is 16%, while the drop from High to Ultra is 24%.

The 4K results are the most demanding. At 3840x2160, Low settings average 70 FPS, which is surprisingly good for a mid-range card and could be a viable option for players who prioritize frame rate over visual fidelity. Medium settings drop to 47 FPS on average, with a range of 40 to 54 FPS, which is borderline playable. High settings average 40 FPS, which is at the edge of playability, while Ultra settings average just 30 FPS, which is not recommended for a smooth experience. The 4K data clearly shows that this combo is not designed for 4K gaming, as even Low settings require significant compromises.

Settings Recommendations

The measured data strongly suggests that Medium settings at 1440p provide the best overall experience for this combo. At 2560x1440 Medium, the system averages 80 FPS with a minimum of 68 FPS, which offers a smooth and responsive gameplay experience while retaining enough visual detail to appreciate Rust's environment. The 68 FPS minimum is above the 60 FPS threshold that most players consider playable, and the 92 FPS maximum indicates there is headroom for less demanding scenes.

For players with 1080p monitors, High settings at 98 FPS average is an excellent choice, as it provides a significant visual upgrade over Medium while maintaining a high frame rate. The 1080p High setting also ensures that the CPU is not the bottleneck, as the 6-core Ryzen 5 8400F has ample headroom at this resolution. Alternatively, 1080p Ultra at 75 FPS is also viable for those who prioritize visual fidelity over every last frame per second.

At 4K, the data does not support a strong recommendation. Even Low settings at 70 FPS require a significant visual compromise, and Medium at 47 FPS average with a 40 FPS minimum is risky for competitive play. The 4K Ultra result of 30 FPS is below the playability threshold and should be avoided. The data indicates that this combo is best utilized at 1080p or 1440p, with 4K reserved for less demanding titles or for players who are willing to accept substantial quality reductions.

The scaling from Medium to High settings at 1440p shows a 16% performance cost, while the jump from High to Ultra costs an additional 24%. This suggests that Ultra settings are not efficiently implemented in Rust for this hardware, and players should stick with High or Medium for the best frame rate per visual quality trade-off.

CPU Role

The AMD Ryzen 5 8400F is a 6-core, 12-thread processor based on the Zen 4 architecture, codenamed Phoenix, and manufactured on a 4 nm process at TSMC. It has a base clock of 4.20 GHz and a boost clock of 4.70 GHz, with a 65 W TDP that keeps thermal requirements modest. The CPU supports DDR5 memory in a dual-channel configuration, providing 83.2 GB/s of bandwidth, which is more than sufficient for Rust's memory access patterns.

The processor's cache hierarchy includes 64 KB of L1 cache per core, 1 MB of L2 cache per core, and a shared 16 MB of L3 cache. While this L3 cache is not as large as some competing desktop chips, the high boost clock of 4.70 GHz helps compensate in single-threaded workloads. Rust is known to be heavily dependent on single-core performance for its main game thread, and the 8400F's single-thread benchmark scores reflect its capability.

In synthetic benchmarks, the 8400F achieves a single-thread score of 2943 in Cinebench R23 and a multicore score of 20851. Its 3DMark single-thread score is 951, while the 16-thread score is 6091. These numbers indicate that the CPU is well-balanced for gaming, with strong per-core performance that can handle Rust's simulation and physics calculations. The CPU's PassMark multithread score of 24389 and single-thread score of 3685 further confirm its positioning as a capable gaming processor.

The data shows that at 1080p Low settings, the system achieves 173 FPS, which is a high enough frame rate that the CPU could potentially become a bottleneck in certain scenes. However, the fact that the frame rate scales consistently with resolution suggests that the CPU is not the primary limiting factor in most scenarios. The CPU's 77th percentile ranking against all processors indicates that it has more headroom than the GPU, and upgrading the graphics card would likely yield a more significant performance improvement in Rust than a CPU upgrade would.

The 8400F's memory support for DDR5 and its PCIe Gen 4 interface with 20 lanes provide a solid foundation for the RX 7700, ensuring that data transfer between the two components is not a bottleneck. The CPU's 25,000 million transistors on a 178 mm² die size demonstrate a dense and efficient design, while its 4 nm process node contributes to its low power consumption relative to its performance.