Rust

The AMD Ryzen 7 5800XT paired with the Intel Arc B390 produces a profoundly GPU-limited experience in Rust, with benchmark results showing that frame rates are dictated almost entirely by the graphics processor rather than the capable eight-core CPU. Across all tested resolutions and settings, the measured average FPS remains low, suggesting that while the processor has ample headroom, the integrated graphics solution becomes the primary constraint. The data indicates a system that can execute the game's logic and physics without issue but cannot push pixels fast enough to deliver a fluid visual experience at any configuration.

Resolution Scaling

The frame rate drop from 1080p to 4K is dramatic and reveals a clear picture of where the bottleneck lies. At 1920x1080 with Low settings, the combination achieves an average of 76 FPS, which is the highest score recorded in the entire dataset. Moving up to 2560x1440 at the same Low preset, the average falls to 53 FPS, representing a 30% reduction in performance. At 3840x2160, the average drops further to 31 FPS, which is a 59% decrease from the 1080p result.

This scaling pattern is consistent across all settings. With Medium settings, the averages are 51 FPS at 1080p, 35 FPS at 1440p, and 21 FPS at 4K. The Ultra preset tells the same story: 33 FPS at 1080p, 23 FPS at 1440p, and 13 FPS at 4K. The high-resolution penalty is substantial, with the 4K Ultra result being only 39% of the 1080p Ultra figure.

These numbers indicate that the limiting component is the GPU. The resolution scaling is nearly linear, which is the classic signature of a graphics-bound scenario. If the CPU were the constraint, the frame rates would remain relatively flat as resolution increases, since the processor's workload would not change much. Instead, the sharp decline in FPS with each step up in pixel count shows that the Arc B390's fill rate and shading capacity are being overwhelmed. The system shared memory architecture, with bandwidth listed as "System Dependent," further compounds this issue, as higher resolutions require more memory bandwidth that the shared configuration may not provide efficiently.

FAQ

Q: What is the best average frame rate this combo can achieve in Rust?

A: The highest recorded average FPS is 76, which occurs at 1920x1080 resolution with Low settings. This is the only configuration in the measured data that approaches a playable frame rate for fast-paced action.

Q: How does the Intel Arc B390 perform relative to its nearest rivals?

A: The GPU's average benchmark score is 1482, placing it in the 9th percentile of all GPUs. Its nearest rival, the NVIDIA GeForce GT 520MX, has an average score of 1463, which is 1.3% lower. The GeForce 800M and GeForce GT 625 OEM scores are 1460 and 1446, representing 1.5% and 2.5% lower performance respectively.

Q: Is the AMD Ryzen 7 5800XT a strong processor for gaming?

A: The CPU sits in the 81st percentile of all CPUs, with an average benchmark score of 29879. Its Cinebench R23 multicore score of 23794 and single-core score of 3359 indicate strong computational performance, though the game data suggests this power is largely untapped due to the GPU bottleneck.

Q: What is the performance difference between Low and Ultra settings at 1080p?

A: At 1920x1080, the Low preset delivers an average of 76 FPS, while the Ultra preset drops to 33 FPS. This represents a 57% reduction in average frame rate when moving from the lowest to the highest quality preset.

Q: Does the CPU's cache configuration matter for Rust?

A: The Ryzen 7 5800XT features 32 MB of shared L3 cache, with 64 KB of L1 and 512 KB of L2 per core. This cache hierarchy provides substantial data locality, which likely helps with the game's world streaming, but the measured FPS data shows the GPU is still the dominant factor in final performance.

Q: What is the minimum FPS recorded in the dataset?

A: The only configurations with recorded minimum FPS values are the Medium settings. At 1920x1080, the minimum is 44 FPS; at 2560x1440, it is 30 FPS; and at 3840x2160, it is 18 FPS. Other presets did not report minimum frame rates.

GPU Role

The Intel Arc B390 is an integrated graphics processor based on the Xe3-LPG architecture, built on Intel's 3 nm process. It operates with a base clock of 300 MHz and a boost clock of 2500 MHz, which is a wide frequency range that allows for aggressive power management. The GPU has 1536 shading units, 48 texture mapping units, and 24 raster operation pipelines, along with 12 ray tracing cores.

The memory configuration is notably unusual: the B390 uses System Shared memory, meaning it draws from the main system RAM rather than dedicated VRAM. The bus width and bandwidth are listed as "System Shared" and "System Dependent," respectively. This is a critical weakness for Rust, which is a game that benefits from fast memory access due to its large, persistent world. The shared memory setup means that the GPU competes with the CPU for bandwidth, and at higher resolutions, this contention likely contributes to the severe frame rate drops observed.

The raw compute figures are modest: 7.680 TFLOPS for FP32 and 15.36 TFLOPS for FP16. The pixel rate is 60.00 GPixel/s, and the texture rate is 120.0 GTexel/s. In Rust, these specifications translate to playable performance only at the lowest settings and resolution. The GPU's percentile ranking of 9th overall places it far below most discrete graphics cards, and its nearest rivals are all older NVIDIA models with similar low-end performance profiles.

The benchmark results show that the B390 is not equipped for high-fidelity gaming. The 3DMark Steel Nomad DX12 score of 1482 confirms its position at the bottom of the performance hierarchy. For a game like Rust, which has complex rendering needs including dynamic lighting and heavy draw distances, the GPU's limited shading power and shared memory architecture are severe handicaps.

Settings Recommendations

Based on the measured FPS data, the only viable configuration for a somewhat playable experience is the Low preset at 1920x1080, which yields an average of 76 FPS. This is the only setting combination that stays above the 60 FPS threshold commonly considered smooth. At 1440p Low, the average drops to 53 FPS, which is playable but not ideal; at 4K Low, the average falls to 31 FPS, which is not recommended for responsive gameplay.

The Medium preset offers a marginal quality improvement but at a significant cost. At 1080p, the average is 51 FPS, which is a 33% reduction from Low. At 1440p Medium, the average is 35 FPS, and at 4K Medium, it is 21 FPS. The minimum frame rates for Medium settings are 44 FPS at 1080p, 30 FPS at 1440p, and 18 FPS at 4K, indicating that even the better configurations will experience noticeable stuttering in dense areas.

High and Ultra settings are effectively unplayable. The High preset averages 43 FPS at 1080p, 30 FPS at 1440p, and 18 FPS at 4K. The Ultra preset averages 33 FPS at 1080p, 23 FPS at 1440p, and 13 FPS at 4K. These numbers suggest that players should avoid these presets entirely, as the visual quality gains do not compensate for the severe performance loss. The data points to Low settings at 1080p as the only reasonable choice, with Medium at 1080p as a compromise for those who prioritize visuals over smoothness.

Measured FPS Breakdown

The complete dataset provides a clear picture of performance across three resolutions and four quality presets. At 1920x1080, the Low preset achieves the highest average of 76 FPS. The Medium preset follows at 51 FPS, with a minimum of 44 FPS and a maximum of 59 FPS. High settings produce an average of 43 FPS, and Ultra drops to 33 FPS. This resolution offers the only playable results, with Low exceeding the 60 FPS mark.

At 2560x1440, performance degrades noticeably. The Low preset averages 53 FPS, which is a 30% drop from the 1080p Low result. Medium averages 35 FPS, with a minimum of 30 FPS and a maximum of 41 FPS. High averages 30 FPS, and Ultra averages 23 FPS. None of these configurations reach 60 FPS, and even the Low preset sits below the ideal threshold for fast-paced gaming.

At 3840x2160, the results are largely unusable. Low settings average 31 FPS, Medium averages 21 FPS with a minimum of 18 FPS and a maximum of 24 FPS, High averages 18 FPS, and Ultra averages 13 FPS. The progression from 1080p to 4K shows a consistent halving of performance at each step for most presets, confirming the GPU-bound nature of the system. The only data points with min/max values are the Medium settings, which show that even the best-case maximum FPS at 4K (24 FPS) is below the minimum at 1080p Medium (44 FPS).

CPU Role

The AMD Ryzen 7 5800XT is a Zen 3 architecture processor with 8 cores and 16 threads, running on the AM4 socket. It has a base clock of 3.80 GHz and a boost clock of 4.80 GHz, with a 105 W TDP. The CPU's benchmark scores show strong multi-threaded and single-threaded performance: Cinebench R23 multicore reaches 23794, and single-core reaches 3359. The PassMark multithread score is 28053, and the single-thread score is 3535.

In Rust, the CPU's role is to handle game logic, physics simulations, and entity management. The 8-core, 16-thread configuration is more than sufficient for this task, as evidenced by the CPU's 81st percentile ranking. The 32 MB of L3 cache helps with keeping frequently accessed game data close to the cores, reducing latency. The 7 nm process node from TSMC, with 4,150 million transistors on a 74 mm² die, produces efficient performance.

However, the measured FPS data shows that the CPU is not the limiting factor. The near-linear FPS scaling with resolution indicates that the GPU is saturated before the CPU reaches its limits. The CPU's performance headroom is substantial, meaning that in a system with a more capable GPU, the Ryzen 7 5800XT would likely deliver much higher frame rates. The processor's benchmark scores also show it is competitive with its nearest rivals, such as the AMD Ryzen 7 7840H, which has an average score of 29868, just 0% different from the 5800XT's 29879.

The CPU's memory support for DDR4 with dual-channel configuration and 51.2 GB/s bandwidth is adequate, but the GPU's reliance on system shared memory means that the CPU's memory traffic may interfere with the GPU's access, potentially exacerbating the bottleneck at higher resolutions.

How This Combo Ranks

The combination of the AMD Ryzen 7 5800XT and Intel Arc B390 ranks 2601 out of 2953 tested combos in Rust. This places it in the bottom 12% of all configurations, reflecting the GPU's severe performance limitations. The rank is a direct consequence of the B390's 9th percentile standing among all GPUs, which drags down the overall system despite the CPU's strong 81st percentile ranking.

This pairing is notably unbalanced. The CPU is a high-performance desktop processor with a launch MSRP of $249, while the GPU is an integrated solution with no standalone price. The benchmark data shows that the CPU is capable of far more than the GPU can deliver. The nearest GPU rivals, such as the GT 520MX and GeForce 800M, are similarly low-end parts, confirming that the B390 is not designed for modern gaming workloads.

The overall combo rank in Rust of 2601 out of 2953 suggests that most other tested systems provide better frame rates. The only configurations that would rank lower are those with even weaker integrated graphics or older CPUs. For context, the CPU's nearest rivals in terms of average benchmark score are the Ryzen 7 7840H, Ryzen 7 8845HS, and Ryzen 7 7840HS, all of which have scores around 29868 to 29955, with deltas of 0% to -0.3%. These CPUs would likely perform similarly in Rust if paired with the same GPU, but the bottleneck remains the graphics solution.

The data shows that this combo is suitable for non-gaming tasks or very old games, but for Rust, it falls far short of providing a smooth experience at standard resolutions. The highest achievable average of 76 FPS at 1080p Low is the only bright spot, but it comes at the cost of visual fidelity. For players seeking higher settings or resolutions, this combination would need a significant GPU upgrade to become viable.