Rust

The AMD Ryzen 7 5800X3D paired with the Intel Arc B390 presents an extreme bottleneck scenario in Rust. The data shows a CPU with substantial multi-threaded capability paired with a GPU whose benchmark scores place it in the lowest tier of the tested database. This combination results in frame rates that are playable only at the lowest settings and resolutions, with the GPU acting as the definitive limiting factor across all measured scenarios.

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 7 5800X3D brings 8 cores and 16 threads to this pairing, running at a base clock of 3.40 GHz and a boost clock of 4.50 GHz. This is a Zen 3 architecture chip built on TSMC's 7 nm process, and its defining feature is the large 96 MB shared L3 cache. In synthetic benchmarks, its multi-threaded performance is strong, scoring 14,317 in Cinebench R23 multi-core and 11,765 in Geekbench multi-core. Single-thread performance is also respectable, with a Cinebench R23 single-core score of 1,452 and a Geekbench single-core score of 2,017.

The processor's overall average benchmark score of 27,896 places it in the 80th percentile of all CPUs tested. The nearest rivals in the database are the AMD Ryzen 7 6800U (avg score 27,887, delta 0%), the Intel Core i9-10900K (avg score 27,872, delta 0.1%), the AMD Ryzen AI 5 PRO 340 (avg score 27,932, delta -0.1%), and the Intel Core i5-12600KF (avg score 27,799, delta 0.3%). These deltas are all within a fraction of a percent, indicating that in raw computational throughput, the 5800X3D is effectively tied with these parts. Its 3DMark 16-thread score of 7,299 and max-thread score of 7,285 further confirm that it has ample headroom for multi-threaded workloads.

In the context of Rust, a survival game known for its demanding simulation and frequent server-side calculations, the CPU's role is theoretically critical. However, the measured FPS data tells a different story. At 1080p with Low settings, the average FPS is 76. This is the highest frame rate achieved in the entire dataset, but it is far below what this CPU is capable of delivering in other titles. The fact that the frame rate drops to 43 FPS at 1080p High and 33 FPS at 1080p Ultra suggests that the game's engine is not being fully utilized by this processor, or more likely, that the GPU is unable to keep up with the CPU's output. The CPU is effectively idle, waiting for the graphics card to render each frame. The 5800X3D's 80th percentile ranking indicates it is a capable gaming processor, but in this specific pairing, its potential is entirely masked by the GPU's limitations.

GPU Role — VRAM, clocks, and how they relate to this game's results

The Intel Arc B390 is a fundamentally different class of hardware. It is an integrated graphics processor (IGP) based on the Xe3-LPG architecture, built on Intel's 3 nm process node. Its memory configuration is "System Shared," meaning it uses a portion of the system's main memory rather than dedicated VRAM. This is a critical detail, as the bandwidth is described as "System Dependent" and the bus width is also "System Shared." The GPU has a base clock of 300 MHz and a boost clock of 2500 MHz, with 1,536 shading units and 24 ROPs.

The GPU's benchmark data is stark. Its only recorded 3DMark Steel Nomad DX12 score is 1,482, which places it in the 9th percentile of all GPUs. The nearest rivals in the database are the NVIDIA GeForce GT 520MX (avg score 1,463, delta 1.3%), the NVIDIA GeForce 800M (avg score 1,460, delta 1.5%), the NVIDIA GeForce GT 625 OEM (avg score 1,446, delta 2.5%), and the NVIDIA GeForce GT 710 (avg score 1,443, delta 2.7%). These are all very old, low-end discrete GPUs, and the Arc B390 is only marginally faster than them. The deltaPct values are positive but tiny, meaning the Arc B390 is only 1.3% to 2.7% faster than these legacy parts.

This explains the FPS results in Rust. The GPU's 24 ROPs and low fill rate (60.00 GPixel/s) are insufficient for even moderate settings. The texture rate of 120.0 GTexel/s and FP32 performance of 7.680 TFLOPS are also far below what modern discrete GPUs offer. In a game like Rust, which has dense foliage, complex bases, and dynamic lighting, the Arc B390 simply lacks the raw pixel-pushing power. The fact that it has no dedicated VRAM and relies on shared system memory further compounds the problem, as memory bandwidth will be a bottleneck regardless of the CPU's capabilities.

Settings Recommendations — which preset gives the best experience per the measured rows

Based on the measured FPS data, the only viable settings for this combination are at the Low preset. At 1080p Low, the average FPS is 76, which is the only configuration that approaches a smooth experience. Moving to 1080p Medium drops the average to 51 FPS, with a minimum of 44 and a maximum of 59. This is a playable range for some, but the frame pacing is inconsistent. At 1080p High, the average falls to 43 FPS, and at 1080p Ultra, it plummets to 33 FPS, which is stuttery and difficult to play.

The trend is even more pronounced at higher resolutions. At 1440p Low, the average is 53 FPS, which is acceptable but noticeably less smooth than 1080p Low. At 1440p Medium, the average drops to 35 FPS, with a minimum of 30 FPS, which is below the threshold for comfortable gameplay. The 1440p High and Ultra presets produce averages of 30 FPS and 23 FPS, respectively, which are not recommended. At 4K, the situation is dire: Low settings yield an average of 31 FPS, Medium drops to 21 FPS (with a min of 18 FPS), High yields 18 FPS, and Ultra produces a slideshow-like 13 FPS.

The data indicates that the Low preset is the only reasonable choice. The performance delta between Low and Medium is significant (from 76 FPS to 51 FPS at 1080p, a 25 FPS drop), while the visual improvement from Low to Medium is unlikely to justify the frame rate loss given the GPU's limitations. For any playable experience, users should stick to 1080p Low and avoid higher resolutions entirely. If a user insists on Medium settings, they should be prepared for frame rates around 50 FPS at 1080p, but the minimum FPS of 44 suggests that there will be noticeable dips.

How This Combo Ranks — use comboRankInGame vs other tested combos

This specific combination of the AMD Ryzen 7 5800X3D and Intel Arc B390 ranks 2,601 out of 2,953 tested combos in Rust. This places it in the bottom 12% of all systems tested for this game. The ranking is a direct reflection of the GPU's severe bottleneck. The CPU's 80th percentile ranking is rendered irrelevant when paired with a GPU in the 9th percentile.

The data shows a massive imbalance: a top-tier gaming CPU from 2022 is paired with a GPU that performs on par with graphics cards from over a decade ago. In Rust, which is generally more CPU-intensive than many other titles, this combo still fails to produce competitive frame rates. The rank of 2,601 suggests that the vast majority of other combinations, including those with much weaker CPUs but even modest discrete GPUs, outperform this setup. The bottleneck is so pronounced that the system is effectively GPU-bound at all settings, meaning the CPU's 3DMark 16-thread score of 7,299 is never fully utilized. For a user looking at this benchmark data, the takeaway is clear: this is a severely mismatched pairing. The CPU is overqualified, and the GPU is underqualified, resulting in an overall experience that is poor for a game like Rust.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The resolution scaling behavior is a textbook example of a GPU-bound system. At Low settings, the average FPS drops from 76 at 1080p to 53 at 1440p, a 30% reduction, and then to 31 at 4K, a further 41% reduction from 1440p. This steep decline with increasing pixel count is a clear indicator that the GPU is the limiting factor. If the CPU were the bottleneck, the frame rates would remain relatively flat across resolutions, as the CPU's workload would not increase significantly with resolution.

The same pattern is visible at other settings. At Medium, the averages are 51 FPS (1080p), 35 FPS (1440p), and 21 FPS (4K). At High, the averages are 43 FPS, 30 FPS, and 18 FPS, respectively. At Ultra, the averages are 33 FPS, 23 FPS, and 13 FPS. In every case, the drop from 1080p to 1440p is substantial, and the drop from 1440p to 4K is even more severe in percentage terms. This is because the GPU's fill rate and memory bandwidth are so limited that every additional pixel has a significant cost.

The data strongly suggests that the Arc B390 is overwhelmed by the pixel count. The system's shared memory architecture means that at 4K, the GPU is likely competing with the CPU for memory bandwidth, further exacerbating the bottleneck. The 5800X3D's dual-channel DDR4 memory bandwidth of 51.2 GB/s is a fixed resource, and the IGP's "System Dependent" bandwidth means it is drawing from this same pool. At 4K, the demands of the frame buffer and textures likely saturate the available bandwidth, causing the catastrophic drop in performance. This is not a CPU limitation; it is purely a GPU and memory subsystem constraint.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

The complete measured FPS dataset for this combo in Rust is as follows:

At 1920x1080 (1080p):

• Low: Average FPS 76
• Medium: Average FPS 51, with a minimum of 44 and a maximum of 59
• High: Average FPS 43
• Ultra: Average FPS 33

At 2560x1440 (1440p):

• Low: Average FPS 53
• Medium: Average FPS 35, with a minimum of 30 and a maximum of 41
• High: Average FPS 30
• Ultra: Average FPS 23

At 3840x2160 (4K):

• Low: Average FPS 31
• Medium: Average FPS 21, with a minimum of 18 and a maximum of 24
• High: Average FPS 18
• Ultra: Average FPS 13

The data is consistent across all resolutions: Low is the only setting that provides an average FPS above 60 at 1080p. The Medium preset at 1080p provides the only other potentially playable experience, but the minimum FPS of 44 indicates occasional drops that could be problematic in fast-paced combat. The High and Ultra presets are not recommended at any resolution, as the frame rates fall below the threshold for smooth gameplay. The minimum FPS values are only provided for the Medium preset, but they show a clear pattern: the frame time variance increases at higher resolutions, which would lead to a less stable experience. For users with a 1440p or 4K monitor, the data strongly advises against using this combo for Rust, as even Low settings fail to deliver 60 FPS at those resolutions.