Rust

# Rust with AMD Ryzen 5 7400F + Intel Arc B390 — Performance Analysis

This combo pairs AMD’s 6-core Zen 4 desktop processor with Intel’s integrated-class Arc B390 graphics, and the measured Rust results paint a clear picture: this is a 1080p-oriented configuration that struggles as resolution climbs. The Ryzen 5 7400F is a strong CPU (83rd percentile among all processors), but the Arc B390 sits at just the 9th percentile for GPUs, making the graphics solution the decisive bottleneck across nearly every tested scenario. The data reveals a system that can deliver playable frame rates at 1080p Low, but quickly falls apart at higher settings and resolutions.

Settings Recommendations

The measured FPS data provides a straightforward hierarchy of playability across presets. At 1920x1080, the Low preset delivers an average of 76 FPS, which is the only configuration in the entire dataset that comfortably exceeds 60 FPS. Medium at 1080p drops to 51 FPS average (with a minimum of 44 FPS), which is playable but with visible dips. High at 1080p averages 43 FPS, while Ultra falls to 33 FPS — both are borderline for a game like Rust where survival combat demands responsiveness.

For 2560x1440, the situation tightens considerably. Low preset averages 53 FPS, which is workable for less demanding scenarios, but Medium drops to 35 FPS (minimum 30 FPS), High to 30 FPS, and Ultra to 23 FPS. At 3840x2160, even Low preset only manages 31 FPS average, and High falls to 18 FPS — these are not viable for normal gameplay.

The best experience per the measured rows is clearly 1080p Low, where the 76 FPS average provides the headroom needed for Rust’s dynamic environments. If visual fidelity matters more than raw frame rate, 1080p Medium at 51 FPS is the highest preset that stays above the 30 FPS playability floor. At 1440p, Low preset is the only reasonable choice, while 4K should be avoided entirely — the data shows no 4K preset reaches even 32 FPS average.

GPU Role

The Intel Arc B390 is the limiting component in this pairing, and the data confirms it emphatically. This is an integrated graphics solution (IGP) based on the Panther Lake chip with Xe3-LPG architecture, built on Intel’s 3 nm process. Its specifications include 1536 shading units, 48 texture mapping units, and 24 raster operation units, with 12 ray tracing cores. The boost clock reaches 2500 MHz from a 300 MHz base, but critically, the memory is System Shared — there is no dedicated VRAM, and bandwidth is listed as System Dependent.

The GPU’s single benchmark score is a 3DMark Steel Nomad DX12 result of 1482, placing it at the 9th percentile of all GPUs. Its nearest rivals in the benchmark database are NVIDIA’s GeForce GT 520MX (score 1463, 1.3% slower), GeForce 800M (1460, 1.5% slower), GT 625 OEM (1446, 2.5% slower), and GT 710 (1443, 2.7% slower). This places the Arc B390 in extremely modest company — these are entry-level or legacy parts.

The system-shared memory architecture means the GPU draws from the same DDR5 pool as the CPU, with bandwidth that varies based on the system configuration. This explains the dramatic FPS drops at higher resolutions: at 4K, the GPU must push four times the pixels of 1080p, and the shared memory bandwidth becomes a severe constraint. The measured data shows the GPU’s FP32 throughput is 7.680 TFLOPS, which is respectable on paper, but the memory bottleneck and low overall GPU percentile (9th) dominate real-world performance. In Rust, this manifests as a hard ceiling: even at 1080p Low, the 76 FPS average suggests the GPU is near its practical limit for this game.

CPU Role

The AMD Ryzen 5 7400F provides a stark contrast to the GPU’s limitations. This 6-core, 12-thread processor from the 7000 series uses the Zen 4 architecture (Raphael codename) on AMD Socket AM5. It runs at a 3.70 GHz base clock with a 4.70 GHz boost, and its 65 W TDP reflects efficient power delivery. The cache layout includes 64 KB L1 per core, 1 MB L2 per core, and 32 MB shared L3. It supports DDR5 memory with dual-channel configuration and 83.2 GB/s bandwidth, plus PCIe Gen 5 with 24 lanes.

Benchmark results show a well-rounded CPU. Cinebench R23 scores are 21765 multi-core and 3072 single-core. PassMark results include 25645 multi-thread, 3689 single-thread, 45799 floating point math, 74745 integer math, and 289999 data compression. The CPU’s percentile vs all CPUs is 83, placing it well above average. Its nearest rivals by average benchmark score are the Intel Core i5-14600T (score 32707, just 0.1% behind), Intel Core Ultra 7 155H (32697, 0.2% behind), AMD Ryzen 7 PRO 6850H (32812, 0.2% ahead), and AMD Ryzen AI 7 PRO 360 (32662, 0.3% behind) — all clustered within a fraction of a percent.

In Rust, the CPU’s role is substantial because the game simulates a persistent world with many entities, physics, and player interactions. The 6-core/12-thread configuration is well-suited to this workload, and the strong single-thread score (3072 in R23 single-core) helps with Rust’s main-thread-heavy rendering pipeline. However, the measured FPS data shows that the CPU’s headroom is largely wasted because the GPU cannot keep up. At 1080p Low, the 76 FPS average likely reflects the GPU ceiling rather than CPU capability — a more powerful GPU would almost certainly push this CPU to higher frame rates. The CPU’s 83rd percentile ranking versus the GPU’s 9th percentile creates an extreme imbalance where the processor idles while the graphics solution struggles.

How This Combo Ranks

In the benchmark database’s measured results for Rust, this combo ranks 2601 out of 2953 tested combinations. That places it in the bottom 12% of all CPU-GPU pairings tested for this game. Given the GPU’s 9th percentile performance and the CPU’s 83rd percentile, this ranking makes sense — the combo is dragged down entirely by the graphics solution.

The rank position relative to other combos indicates that users would need to either dramatically lower settings (which the data shows only helps up to a point) or accept sub-60 FPS gameplay. The data shows that 1080p Low is the only preset breaking 60 FPS, and even that is only 76 FPS average. For context, this is a game where many modern combos would push well past 100 FPS at 1080p High, but this system cannot approach that level.

The imbalance between CPU and GPU is the defining characteristic of this ranking. The Ryzen 5 7400F is a genuinely capable processor, but pairing it with an IGP-class GPU means the combo’s Rust performance is capped at the GPU’s modest limits. The 2601st rank out of 2953 combos suggests that most alternatives — even those with weaker CPUs — would outperform this pairing if they have stronger graphics.

FAQ

Q: What is the best settings preset for this combo in Rust?

A: At 1920x1080, the Low preset delivers 76 FPS average, which is the only measured configuration above 60 FPS. Medium at 1080p averages 51 FPS (minimum 44 FPS), which is playable but with noticeable dips. At 1440p, Low preset drops to 53 FPS, and at 4K, even Low only reaches 31 FPS.

Q: How does the GPU compare to its nearest rivals?

A: The Intel Arc B390 has a 3DMark Steel Nomad score of 1482, placing it at the 9th percentile of all GPUs. Its nearest rivals include the NVIDIA GeForce GT 520MX (1463, 1.3% slower), GeForce 800M (1460, 1.5% slower), GT 625 OEM (1446, 2.5% slower), and GT 710 (1443, 2.7% slower). This places it in entry-level territory.

Q: Is the CPU or GPU the main bottleneck in Rust?

A: The data strongly indicates the GPU is the bottleneck. The Ryzen 5 7400F ranks at the 83rd percentile of CPUs, with a Cinebench R23 multi-core score of 21765 and single-core of 3072. The Arc B390 ranks at the 9th percentile of GPUs. The measured FPS drops across resolutions (76 FPS at 1080p Low to 31 FPS at 4K Low) are consistent with GPU limits, not CPU constraints.

Q: Can this combo run Rust at 1440p?

A: Yes, but only at Low settings, which averages 53 FPS. Medium at 1440p averages 35 FPS (minimum 30 FPS), High averages 30 FPS, and Ultra averages 23 FPS. For consistent playability, 1440p Low is the only viable preset.

Q: What does the combo ranking tell us?

A: This combo ranks 2601 out of 2953 tested combinations for Rust, placing it in the bottom 12%. This reflects the extreme CPU-GPU imbalance: the CPU is well above average, but the GPU’s 9th percentile performance caps the overall result.

Q: Does the CPU’s memory support help the shared GPU memory?

A: The CPU supports DDR5 dual-channel memory with 83.2 GB/s bandwidth. However, the GPU’s memory is System Shared and bandwidth is System Dependent, meaning the actual available bandwidth varies. The measured FPS data suggests this shared arrangement is a limiting factor, particularly at 4K where the FPS drops dramatically even at Low settings.

Measured FPS Breakdown

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

At 3840x2160 (4K), the results are consistently low. Ultra preset averages 13 FPS, High averages 18 FPS, Medium averages 21 FPS (minimum 18 FPS, maximum 24 FPS), and Low averages 31 FPS. No 4K preset reaches 32 FPS, making this resolution impractical for gameplay.

At 2560x1440, performance improves but remains constrained. Ultra averages 23 FPS, High averages 30 FPS, Medium averages 35 FPS (minimum 30 FPS, maximum 41 FPS), and Low averages 53 FPS. The gap between Low and Medium is 18 FPS, indicating that the Medium preset’s additional effects significantly tax the GPU.

At 1920x1080, the results are more usable. Ultra averages 33 FPS, High averages 43 FPS, Medium averages 51 FPS (minimum 44 FPS, maximum 59 FPS), and Low averages 76 FPS. The progression from Ultra to Low shows a steady climb: 33 to 43 to 51 to 76 FPS, with the largest jump (25 FPS) occurring between Medium and Low.

The minimum FPS data, where available, shows that frame pacing is relatively stable. At 1080p Medium, the minimum is 44 FPS versus a 51 FPS average — a 7 FPS drop. At 1440p Medium, the minimum is 30 FPS versus a 35 FPS average — a 5 FPS drop. At 4K Medium, the minimum is 18 FPS versus a 21 FPS average — a 3 FPS drop. This suggests the GPU maintains consistent frame delivery within each preset, but the overall ceilings are low.

Resolution Scaling

The FPS scaling from 1080p to 4K reveals where the bottleneck lies. Starting with the Low preset: 76 FPS at 1080p drops to 53 FPS at 1440p (a 30% reduction) and then to 31 FPS at 4K (a 59% reduction from 1080p). For Medium: 51 FPS at 1080p, 35 FPS at 1440p (31% reduction), and 21 FPS at 4K (59% reduction). For High: 43 FPS at 1080p, 30 FPS at 1440p (30% reduction), and 18 FPS at 4K (58% reduction). For Ultra: 33 FPS at 1080p, 23 FPS at 1440p (30% reduction), and 13 FPS at 4K (61% reduction).

The consistency of these percentage drops — roughly 30% from 1080p to 1440p and another 40-45% from 1440p to 4K — is a classic sign of a GPU-bound scenario. If the CPU were the limiting factor, the FPS would remain more constant across resolutions because the CPU workload doesn’t scale with pixel count. Instead, the near-uniform percentage drops indicate that the Arc B390’s rendering throughput is the constraint.

The data also shows that the FPS drop from 1440p to 4K is proportionally larger than from 1080p to 1440p. This is consistent with the GPU’s shared memory architecture: at 4K, the pixel fill rate and memory bandwidth demands overwhelm the system-shared memory, causing the sharper decline. The pixel rate of 60.00 GPixel/s and texture rate of 120.0 GTexel/s are simply insufficient for 4K rendering in Rust at any preset.

What this resolution scaling implies is that the combo operates in a narrow sweet spot: 1080p Low to Medium, and possibly 1440p Low for users who prefer higher resolution over frame rate. Beyond that, the GPU’s limitations become the dominant factor, and no amount of CPU headroom from the Ryzen 5 7400F can compensate. The 83rd percentile CPU is effectively idle while the 9th percentile GPU works at its maximum capability. For users considering this combination, the measured data suggests that 1080p Low is the only configuration that provides a consistently smooth experience, and even that at 76 FPS average leaves little margin for Rust’s more demanding scenes.