Rust

The Intel Core i5-10400F paired with the Intel Arc B390 produces a specific performance profile in Rust that is heavily constrained by the graphics solution. At 1080p, the combination is capable of playable frame rates, but the experience degrades rapidly as resolution increases, making preset selection critical for maintaining a playable session. The data indicates that the best experience is achieved at 1920x1080 with the Low preset, which delivers an average of 76 FPS, the highest measured score across the entire test matrix. This preset provides the necessary headroom for smoother gameplay, whereas higher settings at this resolution yield averages of 51 FPS (Medium), 43 FPS (High), and 33 FPS (Ultra). The Medium preset at 1080p, with a minimum of 44 FPS and a maximum of 59 FPS, is the only other configuration that keeps average frame rates above the 50 FPS threshold, but the Low preset remains the safest choice for consistency.

Settings Recommendations

The measured data shows a clear hierarchy in Rust performance for this combo, with the Low preset at 1920x1080 being the definitive best option. This configuration produces an average of 76 FPS, which is 25 FPS higher than the next best setting (Medium at 1080p with 51 FPS). The delta between Low and Medium at 1080p is substantial—a 49% improvement in average frame rate—indicating that the graphics settings have a profound impact on the bottleneck. For users prioritizing a stable experience, the Low preset is the only setting that keeps the average comfortably above the 60 FPS mark, which is often considered a target for fluid gameplay in first-person survival titles.

Raising the preset to Medium at 1080p yields a playable but noticeably less smooth experience, with an average of 51 FPS and a minimum of 44 FPS. The High preset drops further to 43 FPS, and Ultra falls to 33 FPS, which is below the threshold for acceptable responsiveness in a game where player-vs-player combat requires quick reactions. The data suggests that the visual fidelity gains from higher presets do not justify the performance cost; the difference between Low and Ultra at 1080p is a 43 FPS gap (76 vs 33), which represents a 56% reduction in average frame rate. Given that Rust is a survival game where environmental awareness is crucial, the smoother motion from the Low preset is arguably more valuable than the improved shadows and textures from higher settings.

At 2560x1440, the best possible outcome is still inferior to the 1080p Low result. The Low preset at 1440p delivers an average of 53 FPS, which is playable but represents a 30% drop compared to the same preset at 1080p. The Medium preset at 1440p averages 35 FPS (minimum 30, maximum 41), while High and Ultra are effectively unplayable at 30 FPS and 23 FPS respectively. The 4K resolution results compound this issue, with even the Low preset only managing 31 FPS, which is below the minimum for a responsive experience. Therefore, the recommendation is unequivocal: use 1080p with Low settings for the best balance of performance and playability, as this is the only configuration that breaks the 60 FPS barrier.

CPU Role

The Intel Core i5-10400F is a 6-core, 12-thread processor based on the Comet Lake architecture, built on a 14 nm process. It has a base clock of 2.90 GHz and a boost clock of 4.30 GHz, with 12 MB of shared L3 cache. The CPU's benchmark scores indicate competent multi-threaded performance, with a Cinebench R23 multi-core score of 10283 and a single-core score of 1451. These figures place the processor at the 68th percentile among all CPUs, suggesting it is a mid-range performer that should not bottleneck a game like Rust severely, especially at lower resolutions.

However, the measured FPS data reveals that the CPU is not the primary limiting factor in this combination. The dramatic FPS drops when moving from 1080p to 1440p and 4K—76 to 53 to 31 FPS on Low settings—point to the GPU being the bottleneck. The CPU's 3DMark scores reinforce this: the max threads score of 4735 and the 16-thread score of 4748 show that the processor has sufficient headroom for modern gaming workloads. The single-thread score of 688 in 3DMark and 2541 in Passmark indicate that even single-core performance, which is often critical for game logic, is adequate for Rust's requirements.

The nearest rivals to the i5-10400F in terms of average benchmark score include the Intel Xeon 6756E (0.2% higher), the Intel Core 7 160UL (0.3% lower), and the AMD EPYC 7552 (0.5% higher). These small deltas confirm that the CPU is performing exactly as expected for its class. The fact that Rust's frame rates do not improve significantly at 1080p when dropping from High to Low (43 to 76 FPS) suggests that the CPU can feed frames faster than the GPU can render them, but the absolute ceiling is set by the graphics card. In low-resolution scenarios, the CPU's 12 threads and 4.30 GHz boost clock are sufficient to maintain frame delivery, but the GPU's limited compute resources prevent the system from achieving higher averages.

GPU Role

The Intel Arc B390 is an integrated graphics solution based on the Xe3-LPG architecture, fabricated on a 3 nm process. It features 1536 shading units, 48 texture mapping units, and 24 raster operation units, along with 12 ray tracing cores. The GPU operates at a base clock of 300 MHz and a boost clock of 2500 MHz, with a pixel rate of 60.00 GPixel/s and a texture rate of 120.0 GTexel/s. The FP32 performance is rated at 7.680 TFLOPS, which might seem respectable on paper, but the GPU's memory is "System Shared," meaning it relies on system RAM rather than dedicated VRAM, and its bandwidth is "System Dependent."

The benchmark data exposes the GPU's true capability: its 3DMark Steel Nomad score is only 1482, placing it at the 9th percentile among all GPUs. This is a very low ranking, and the nearest rivals are legacy NVIDIA parts like the GeForce GT 520MX (1.3% higher), GeForce 800M (1.5% higher), and GT 625 OEM (2.5% higher). The Arc B390's average benchmark score of 1482 is essentially at the bottom of the modern GPU hierarchy. This explains why the measured FPS in Rust is so heavily constrained by the graphics settings; the GPU simply does not have the compute throughput or memory bandwidth to handle higher resolutions or graphical presets.

The GPU's shared memory architecture is a significant handicap for Rust, a game that is known to be memory-intensive. The "System Shared" memory type means that the GPU competes with the CPU for system memory bandwidth, which can cause stuttering and reduced frame rates in complex scenes. The measured data shows that at 4K Ultra, the combo only achieves 13 FPS, which is a clear indication of the GPU reaching its limit. Even at 1080p Ultra, the average is 33 FPS, suggesting that the GPU's 24 ROPs and 48 TMUs are overwhelmed by the higher texture and shading demands. The boost clock of 2500 MHz is high, but the underlying architecture cannot compensate for the lack of dedicated memory bandwidth.

FAQ

Q: What is the best resolution and settings combination for this system in Rust?

A: The data shows that 1920x1080 with the Low preset delivers the highest average FPS at 76, making it the optimal configuration. The Medium preset at 1080p is the next best option with 51 FPS, but all other settings and resolutions produce lower averages.

Q: Is the Intel Core i5-10400F a bottleneck in Rust?

A: No, the CPU is not the primary bottleneck. The processor's benchmark scores (e.g., Cinebench R23 multi-core 10283) and its 68th percentile ranking indicate it is capable. The FPS drops from 76 to 53 to 31 on Low settings as resolution increases from 1080p to 1440p to 4K demonstrate that the GPU is the limiting factor.

Q: How does the Intel Arc B390 compare to its nearest GPU rivals in raw performance?

A: The Arc B390 has an average benchmark score of 1482, which is only 1.3% higher than the NVIDIA GeForce GT 520MX, 1.5% higher than the GeForce 800M, and 2.5% higher than the GT 625 OEM. This places it in the 9th percentile of all GPUs, indicating very low relative performance.

Q: Can this system run Rust at 4K with playable frame rates?

A: No, the measured data shows that even the Low preset at 3840x2160 only achieves 31 FPS, while High and Ultra produce 18 FPS and 13 FPS respectively. These frame rates are below acceptable thresholds for a responsive experience.

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

A: At 2560x1440, the Low preset averages 53 FPS, while the Ultra preset averages 23 FPS. This represents a 30 FPS difference, or a 57% reduction in average frame rate, highlighting the significant performance cost of higher graphical settings.

Q: Does the system's memory architecture affect its Rust performance?

A: The GPU uses "System Shared" memory with "System Dependent" bandwidth, which is a notable constraint. The data shows that the GPU is severely limited, and this shared memory setup likely contributes to the low FPS numbers, especially at higher resolutions where memory bandwidth demands increase.

Resolution Scaling

The measured FPS data reveals a steep performance cliff as resolution increases, which is characteristic of a GPU-bound system. On the Low preset, the average frame rate drops from 76 FPS at 1920x1080 to 53 FPS at 2560x1440, a reduction of 23 FPS (30%). Moving from 1440p to 3840x2160, the average drops further to 31 FPS, another 22 FPS reduction (42%). This linear degradation pattern indicates that the Intel Arc B390's rendering capabilities are being saturated at each resolution step, with the GPU's pixel fill rate and shading units unable to keep pace with the increasing pixel count.

The scaling behavior across different presets tells a similar story. At 1080p, the difference between Low and Medium is 25 FPS (76 vs 51), while at 1440p, the difference is 18 FPS (53 vs 35), and at 4K, it is 10 FPS (31 vs 21). The decreasing delta between presets at higher resolutions suggests that the GPU is so overwhelmed at 4K that even reducing the graphical load has a diminished effect. The Ultra preset shows the most severe scaling: 33 FPS at 1080p, 23 FPS at 1440p, and 13 FPS at 4K. This represents a 61% reduction in FPS from 1080p to 4K, confirming that the GPU is the definitive limiting component.

The resolution scaling data also indicates that the CPU is not a factor in these drops. The i5-10400F's multi-threaded performance (Cinebench R23 multi-core 10283) suggests it could handle more frames at lower resolutions if the GPU allowed it. However, the fact that the 1080p Low preset only achieves 76 FPS, when similar CPUs in other configurations can push higher, points to the GPU's 9th percentile ranking as the hard ceiling. The system is clearly GPU-bound from 1080p upwards, and the resolution scaling curves reflect the Arc B390's limited fill rate and memory bandwidth.

Measured FPS Breakdown

At 1920x1080, the combo delivers its best results. The Low preset averages 76 FPS, which is the only measured configuration to exceed 60 FPS. The Medium preset averages 51 FPS with a minimum of 44 FPS and a maximum of 59 FPS, providing a playable but less fluid experience. The High preset averages 43 FPS, and the Ultra preset averages 33 FPS. The frame rate spread between presets is substantial, with Low being 43 FPS higher than Ultra, indicating that each step up in graphical quality costs roughly 10-15 FPS on average.

At 2560x1440, all presets experience significant drops. The Low preset averages 53 FPS, which is a 23 FPS reduction from the 1080p result. The Medium preset averages 35 FPS (minimum 30, maximum 41), while High and Ultra average 30 FPS and 23 FPS respectively. The 1440p results show that only the Low preset remains marginally playable, and even then, it falls below the 60 FPS target. The difference between Low and Ultra at this resolution is 30 FPS, which is a larger absolute gap than at 1080p, but the relative performance loss is similar.

At 3840x2160, the system struggles across all presets. The Low preset averages 31 FPS, which is the highest at this resolution. The Medium preset averages 21 FPS with a minimum of 18 FPS and a maximum of 24 FPS, while High and Ultra average 18 FPS and 13 FPS respectively. The 4K data shows that the GPU is utterly overwhelmed, with even the lowest settings failing to reach 35 FPS. The min and max figures for Medium at 4K (18-24 FPS) illustrate the unstable frame delivery, which would result in noticeable stuttering during gameplay. Overall, the measured FPS breakdown confirms that this combo is only suitable for 1080p gaming, and only with the Low preset for a consistent experience.

How This Combo Ranks

The Intel Core i5-10400F + Intel Arc B390 combination ranks 2601 out of 2953 tested combos in Rust, placing it in the bottom 12% of all configurations. This ranking is consistent with the individual component performance levels: the CPU sits at the 68th percentile, but the GPU's 9th percentile ranking drags the overall combo down significantly. The data indicates that the GPU is the dominant factor in this low ranking, as the CPU is a reasonably capable mid-range part, while the GPU is comparable to decade-old discrete graphics solutions.

The rank of 2601 out of 2953 means that there are 352 combos that perform worse than this one, but the vast majority of tested systems (2600) deliver better frame rates in Rust. This is a poor showing for a modern system, and it underscores the impracticality of pairing a competent 6-core processor with an integrated GPU that has such limited compute capabilities. The nearest GPU rivals, such as the NVIDIA GeForce GT 520MX and GT 625 OEM, are entry-level parts from previous generations, and their performance in modern titles like Rust is expected to be minimal.

In the context of the benchmark database, this combo serves as a cautionary example of how a balanced system is crucial for gaming performance. The CPU's benchmark scores (e.g., Passmark multi-thread 12115) suggest it could drive much higher frame rates if paired with a discrete GPU, but the Arc B390's shared memory architecture and low pixel rate create a hard bottleneck. The ranking reflects this imbalance: the system is capable of running the game, but only at the lowest settings and resolution, and it falls far behind even modest gaming laptops or desktops with entry-level discrete graphics cards. For users seeking a playable Rust experience, this combo is not recommended based on the measured data.