Rust

The Intel Core i5-9400 paired with the AMD Radeon RX 7700 XT delivers a solid 1080p experience in Rust, but the data reveals that the CPU becomes a significant bottleneck at higher resolutions and demanding settings. The measured FPS indicates that players should prioritize the Medium preset for the best balance of visual fidelity and performance, as it is the only preset with complete min/max data across all resolutions, showing consistent frame pacing. The GPU is clearly the dominant component in this pairing, but its potential is capped by the six-core processor at 1080p, while at 4K the tables turn and the GPU becomes the limiting factor.

Settings Recommendations

The benchmark data strongly favors the Medium preset as the optimal choice for this hardware combination. At 1920x1080, Medium delivers an average of 122 FPS with a minimum of 104 FPS and a maximum of 140 FPS, providing a smooth experience that stays well above the 60 FPS threshold for competitive play. The Low preset offers higher average frame rates (142 FPS at 1080p), but the jump to Medium is relatively small (a drop of only 20 FPS average) while providing substantially better visual quality in a survival game where spotting distant players and environmental details matter.

The High preset at 1080p drops to an average of 107 FPS, which is still playable but represents a 15 FPS average loss compared to Medium. The data suggests that the performance cost of High over Medium is not justified given the modest visual gains typical of that tier. More critically, the Ultra preset at 1080p falls to 82 FPS average, which represents a 40 FPS loss from Medium—a 33% reduction that will be noticeable in fast-paced combat scenarios. The benchmark results indicate that Ultra settings push the i5-9400 too hard, as the processor's six cores and six threads without hyper-threading struggle to maintain fluid frame delivery.

At 2560x1440, Medium again proves to be the sweet spot with an 88 FPS average and a minimum of 74 FPS, which keeps gameplay smooth on most 1440p displays. The Low preset at 1440p reaches 125 FPS average, but the visual degradation in a game like Rust—where you need to spot enemies hiding in bushes or behind structures—makes this trade-off questionable. The High preset at 1440p delivers 74 FPS average, which is borderline acceptable, but the 14 FPS drop from Medium suggests that the CPU is starting to become a limiting factor.

For 4K resolution (3840x2160), the data shows that Medium is the only viable option, delivering 52 FPS average with a minimum of 44 FPS and a maximum of 59 FPS. This is below the ideal 60 FPS target, but it remains playable for a survival game that is not twitch-reflex dependent. The High preset at 4K drops to 44 FPS average, and Ultra falls to 33 FPS average—both too low for a satisfying experience. The Low preset at 4K reaches 77 FPS average, but at such a high resolution, the visual downgrade from Low settings is severe enough to hinder gameplay effectiveness.

CPU Role

The Intel Core i5-9400 is a six-core, six-thread processor from the Coffee Lake architecture, operating with a base clock of 2.90 GHz and a boost clock of 4.10 GHz. It has a 9 MB shared L3 cache and supports dual-channel DDR4 memory with a bandwidth of 42.7 GB/s. In the broader benchmark landscape, this CPU sits at the 47th percentile compared to all CPUs, with an average benchmark score of 2254. Its nearest rivals include the Intel Core i7-1068NG7 (0.2% slower), Intel Core i7-10710U (0.3% faster), and AMD Ryzen 5 PRO 1500 (0.4% faster), indicating that the i5-9400 is positioned in a tightly contested mid-range segment.

The benchmark data from Rust reveals a clear pattern: the CPU's performance ceiling is reached when the GPU is not heavily taxed. At 1080p with Low settings, the system achieves 142 FPS average, which is the highest recorded score in the entire dataset. This suggests that the CPU can push frame rates high when the GPU has minimal work. However, the difference between Low and Medium at 1080p is only 20 FPS (142 vs 122), while the difference between Medium and High is 15 FPS (122 vs 107), and High to Ultra is 25 FPS (107 vs 82). This progressive decline in performance scaling indicates that the CPU's six threads become saturated as the game's simulation load increases with higher settings.

The single-core performance of the i5-9400, reflected in a Cinebench R23 single-core score of 935, is adequate for Rust's primary thread, but the lack of hyper-threading means that background tasks and the game's secondary threads compete for the same six physical cores. The multi-core Cinebench R23 score of 6629 shows that the CPU can handle parallel workloads, but in Rust's real-time environment, the frame time consistency suffers when all cores are loaded. The measured FPS data supports this interpretation: at 1440p Medium, the minimum FPS of 74 is exactly the same as the average FPS at 1440p High (74), suggesting that the CPU is the bottleneck in both scenarios, preventing the GPU from delivering higher frame rates.

GPU Role

The AMD Radeon RX 7700 XT is a RDNA 3.0 architecture GPU built on a 5 nm process by TSMC, featuring the Navi 32 chip with 28,100 million transistors on a 346 mm² die. It comes with 12 GB of GDDR6 memory on a 192-bit bus, delivering 432.0 GB/s of bandwidth. The GPU's boost clock is rated at 2544 MHz, with a game clock of 2171 MHz, and it supports PCIe 4.0 x16. In the overall GPU rankings, it sits at the 67th percentile with an average benchmark score of 22549. Its nearest rivals include the NVIDIA GeForce RTX 5060 Mobile (0.5% faster), NVIDIA GeForce RTX 4060 Mobile (0.8% slower), NVIDIA GeForce RTX 2080 (1.5% slower), and AMD Radeon RX 5700 (1.7% faster).

The GPU's 12 GB of VRAM is sufficient for Rust at all tested resolutions and settings, as the game's texture streaming and world rendering do not appear to exceed this capacity based on the measured FPS data. The 432.0 GB/s of memory bandwidth provides ample headroom for the 192-bit bus, and the 96 ROPs ensure efficient pixel processing at high resolutions. The GPU's raw compute power, measured at 35.17 TFLOPS FP32, is substantial, but the benchmark results show that this power is not fully utilized in Rust due to CPU limitations.

At 1080p, the GPU is clearly not the limiting factor. The difference between Low and Ultra settings at 1080p is 60 FPS (142 vs 82), but the GPU's capabilities suggest it could deliver even higher frame rates if the CPU were faster. The evidence for this comes from the 1440p results: at Medium settings, the average FPS drops from 122 at 1080p to 88 at 1440p, a 28% reduction that is roughly proportional to the increase in pixel count (from 2.07 million to 3.69 million pixels, about 78% more pixels). The GPU is scaling as expected with resolution, but the CPU is not keeping pace.

The true GPU bottleneck emerges at 4K. The drop from 1440p Medium (88 FPS) to 4K Medium (52 FPS) is 41%, while the pixel count increases by 125% (from 3.69 million to 8.29 million pixels). This disproportionate drop indicates that the GPU is now the primary constraint, as the CPU has already been pushed to its limit at lower resolutions. The GPU's performance at 4K Low (77 FPS) versus 4K Medium (52 FPS) shows a 25 FPS penalty for the Medium preset, which is a 32% reduction—further evidence that the GPU is struggling to handle the pixel throughput at this resolution.

FAQ

Q: Is this combination capable of running Rust at 1440p?

A: Yes, the data shows that at 2560x1440 with Medium settings, the system achieves an average of 88 FPS with a minimum of 74 FPS. Even at High settings, the average stays at 74 FPS, making 1440p gaming viable for this hardware.

Q: What is the maximum frame rate this system can achieve in Rust?

A: The highest recorded average FPS in the dataset is 142 FPS, achieved at 1920x1080 with Low settings. This indicates the CPU's peak performance ceiling when the GPU is not heavily loaded.

Q: Should users enable Ultra settings for the best experience?

A: No. The Ultra preset delivers the lowest frame rates across all resolutions, dropping to 82 FPS at 1080p, 56 FPS at 1440p, and 33 FPS at 4K. The performance cost is prohibitive, and the Medium preset provides a far better balance of visual quality and playability.

Q: How does the CPU compare to its closest rivals in synthetic benchmarks?

A: The i5-9400 has an average benchmark score of 2254, which is 0.2% lower than the Intel Core i7-1068NG7 and 0.4% lower than the AMD Ryzen 5 PRO 1500. It scores 0.3% higher than the Intel Core i7-10710U, placing it in a tightly competitive mid-range tier.

Q: Is the GPU's performance consistent with its benchmark percentile?

A: The RX 7700 XT sits at the 67th percentile among all GPUs, and the Rust data generally reflects this mid-to-high tier positioning. At 1080p Medium, the 122 FPS average is strong, but the CPU prevents the GPU from reaching its full potential, as evidenced by the 4K performance drop.

Q: What does the minimum FPS data tell us about frame pacing?

A: The Medium preset is the only one with complete min/max data at all resolutions. At 1080p, the minimum of 104 FPS and maximum of 140 FPS show a 36 FPS variance, while at 1440p the range is 74-101 FPS, and at 4K it is 44-59 FPS. This suggests that frame pacing becomes less consistent as resolution increases, likely due to the GPU becoming the bottleneck.

Resolution Scaling

The FPS scaling across resolutions reveals a clear shift in the bottleneck component. From 1080p to 1440p at Medium settings, the average FPS drops from 122 to 88, a 28% reduction. The pixel count increases by 78%, so the FPS loss is proportionally smaller than the pixel increase, indicating that the CPU is still the primary limiter at 1440p. From 1440p to 4K at Medium settings, the average FPS drops from 88 to 52, a 41% reduction, while the pixel count increases by 125%. This disproportionate drop signals that the GPU has now become the bottleneck.

The Low settings data shows a similar pattern but with a different magnitude. From 1080p Low (142 FPS) to 1440p Low (125 FPS), the drop is only 12%, which is much smaller than the pixel increase—the CPU is clearly holding back the GPU at 1080p Low. From 1440p Low to 4K Low (77 FPS), the drop is 38%, again showing the GPU becoming the limiting factor. The High settings data shows the most dramatic scaling: 107 FPS at 1080p, 74 FPS at 1440p (31% drop), and 44 FPS at 4K (41% drop from 1440p). This suggests that High settings impose enough CPU load to create a bottleneck even at 1080p, and the GPU then becomes increasingly stressed at higher resolutions.

The Ultra preset demonstrates the worst scaling behavior. From 1080p Ultra (82 FPS) to 1440p Ultra (56 FPS), the drop is 32%, and from 1440p Ultra to 4K Ultra (33 FPS), the drop is 41%. This shows that Ultra settings overwhelm both the CPU and GPU, with the CPU struggling at lower resolutions and the GPU failing at higher resolutions. The data suggests that for this pairing, the optimal resolution is 1080p with Medium settings, where the system achieves a 122 FPS average with a 104 FPS minimum, providing the best combination of smoothness and visual quality.

Measured FPS Breakdown

The complete measured FPS dataset for Rust with the Intel Core i5-9400 and AMD Radeon RX 7700 XT is as follows:

At 1920x1080:

• Low: 142 FPS average (no min/max data provided)
• Medium: 122 FPS average, with a minimum of 104 FPS and a maximum of 140 FPS
• High: 107 FPS average (no min/max data provided)
• Ultra: 82 FPS average (no min/max data provided)

At 2560x1440:

• Low: 125 FPS average (no min/max data provided)
• Medium: 88 FPS average, with a minimum of 74 FPS and a maximum of 101 FPS
• High: 74 FPS average (no min/max data provided)
• Ultra: 56 FPS average (no min/max data provided)

At 3840x2160:

• Low: 77 FPS average (no min/max data provided)
• Medium: 52 FPS average, with a minimum of 44 FPS and a maximum of 59 FPS
• High: 44 FPS average (no min/max data provided)
• Ultra: 33 FPS average (no min/max data provided)

The Medium preset is the only one with complete frame time data across all resolutions, which provides the most reliable picture of performance consistency. The 1080p Medium minimum of 104 FPS is well above the 60 FPS threshold for smooth gameplay, and the 1440p Medium minimum of 74 FPS is still respectable. The 4K Medium minimum of 44 FPS is the weakest point, but the game remains playable. The overall combination ranks 1636 out of 3723 tested combinations in Rust, placing it in the 44th percentile of all hardware pairings—a solid mid-tier result that aligns with the individual component rankings.