Rust

The AMD Ryzen 7 9800X3D paired with the Intel Arc B390 produces a severely GPU-bound experience in Rust, with frame rates that collapse as resolution increases. Benchmark results show this combination ranks 2601 out of 2953 tested combos, placing it in the bottom 12% of all systems tested. The Arc B390’s integrated-class performance, evidenced by its 9th percentile ranking among all GPUs, becomes the dominant limiting factor across every resolution and settings preset tested. This analysis breaks down the measured performance data to explain where the bottleneck lies, what the frame rates mean relative to other hardware, and which settings deliver the most playable experience.

Resolution Scaling

The performance drop from 1080p to 4K is dramatic and reveals a system that is entirely constrained by the graphics processor. At Low settings, the average frame rate falls from 76 FPS at 1920x1080 to 53 FPS at 2560x1440, then plunges to 31 FPS at 3840x2160. That represents a 30% reduction moving from 1080p to 1440p, followed by a further 41% reduction moving from 1440p to 4K. The cumulative drop from 1080p Low to 4K Low is 59%, meaning the system loses nearly two-thirds of its performance when pixel count quadruples.

High settings show a similar pattern with even lower absolute numbers. At 1920x1080 High, the average is 43 FPS. This falls to 30 FPS at 2560x1440, a 30% decrease, and then to 18 FPS at 3840x2160, another 40% decrease. The 4K High result of 18 FPS is effectively unplayable for a survival game where rapid reactions matter. Medium settings follow the same trajectory: 51 FPS at 1080p, 35 FPS at 1440p, and 21 FPS at 4K, with the 4K result dipping to a minimum of 18 FPS and a maximum of 24 FPS in the measured frame time variance.

Ultra settings demonstrate the most severe degradation. The system manages 33 FPS at 1080p Ultra, drops to 23 FPS at 1440p Ultra, and bottoms out at 13 FPS at 4K Ultra. This 61% reduction from 1080p to 4K at Ultra settings confirms that the GPU is overwhelmed by the combination of high pixel counts and demanding visual effects. The scaling pattern across all four settings presets is consistent: each resolution step roughly halves the frame rate, which is the classic signature of a graphics card operating far beyond its comfortable workload range.

The data indicates that the CPU is not the limiting component in this scaling behavior. The Ryzen 7 9800X3D, with its 8 cores and 16 threads, delivers strong synthetic benchmark scores including a Cinebench R23 multicore result of 23230 and a Geekbench multicore score of 18696. If the CPU were the bottleneck, frame rates would remain relatively flat across resolutions as the GPU waits for processor data. Instead, the consistent 30-40% drops at each resolution step point squarely at the Arc B390’s limited pixel throughput of 60.00 GPixel/s and texture rate of 120.0 GTexel/s as the primary constraint.

GPU Role

The Intel Arc B390 is the decisive factor in this system’s Rust performance, and the numbers confirm it operates in a class far below what the CPU can feed. Its 3DMark Steel Nomad DX12 score of 1482 places it in the 9th percentile of all GPUs, with nearest rivals including the NVIDIA GeForce GT 520MX (1463, 1.3% higher), NVIDIA GeForce 800M (1460, 1.5% higher), NVIDIA GeForce GT 625 OEM (1446, 2.5% higher), and NVIDIA GeForce GT 710 (1443, 2.7% higher). These are all legacy or entry-level mobile parts, which contextualizes why Rust frame rates remain so low even at 1080p.

The GPU’s memory configuration is system shared, meaning it draws from the same DDR5 pool as the CPU rather than having dedicated VRAM. The memory bandwidth is listed as system dependent, which in practice means the GPU competes with the CPU for memory access. The Ryzen 7 9800X3D’s dual-channel DDR5 memory bandwidth of 89.6 GB/s must serve both the processor’s 16 threads and the GPU’s rendering tasks. In a game like Rust, which features large procedurally generated worlds with extensive texture streaming, this shared memory arrangement likely contributes to the low average frame rates observed across all settings.

Clock speeds on the Arc B390 show a base of 300 MHz and a boost of 2500 MHz, which on paper seems adequate, but the GPU’s modest specifications tell the real story. With 1536 shading units, 48 texture mapping units, and only 24 raster output units, the GPU is structurally limited in how many pixels it can process per frame. The FP32 compute of 7.680 TFLOPS and FP16 of 15.36 TFLOPS (2:1) are far below what dedicated desktop gaming GPUs offer, and Rust’s draw calls and shadow rendering appear to exceed these capabilities quickly. The 12 ray tracing cores are present but do little to help in a game that primarily relies on traditional rasterization.

The GPU’s 80 W TDP and IGP slot width indicate it is designed for integrated use in mobile or compact systems, not for driving a demanding survival title at high resolutions. The measured frame rates reflect this: even the best result, 76 FPS at 1080p Low, is only achievable by stripping away most visual fidelity. At 4K, every settings preset produces average frame rates below 31 FPS, with Ultra at 13 FPS being little more than a slideshow. The data strongly suggests that anyone considering this combo for Rust should expect to play at 1080p with reduced settings, as higher resolutions consistently push the GPU past its limits.

How This Combo Ranks

This combination of AMD Ryzen 7 9800X3D and Intel Arc B390 ranks 2601 out of 2953 tested combos for Rust, placing it in the bottom 12% of all systems in the database. This low ranking is almost entirely attributable to the GPU, as the CPU alone benchmarks in the 87th percentile among all processors. The disconnect between the CPU’s high percentile and the combo’s low rank highlights how severely the Arc B390 drags down overall gaming performance.

The CPU’s nearest rivals in synthetic benchmarks include the AMD Ryzen 7 PRO 8840HS (39603 average score, 0.4% lower), AMD Ryzen AI 9 365 (40048, 0.7% higher), AMD Ryzen AI 7 450 (39485, 0.7% lower), and AMD Ryzen 7 7700 (40081, 0.8% higher). These deltas are all within 1%, meaning the 9800X3D’s raw compute is competitive with other modern processors, yet none of that matters when the GPU cannot translate CPU horsepower into frame rates.

The GPU’s nearest rivals, as noted, are all legacy or low-end NVIDIA parts from roughly a decade ago. Being 1.3% slower than a GT 520MX and 2.7% faster than a GT 710 in 3DMark Steel Nomad places the Arc B390 firmly in entry-level territory. In Rust specifically, this GPU ranking translates directly to the measured FPS results, which show that the combo struggles to maintain even 60 FPS at 1080p Low, a threshold that many modern systems exceed by wide margins.

The rank of 2601 out of 2953 means that 88% of tested combos deliver better Rust performance. This is not a subtle gap; it is a fundamental mismatch where a high-end CPU is paired with a GPU that cannot utilize its capabilities. The data shows that the CPU’s 8 cores and 16 threads, with a boost clock of 5.20 GHz, are never the limiting factor in any measured scenario. Even at 1080p Low where the CPU has the least work relative to the GPU, the frame rate is still capped by the graphics processor’s throughput.

Measured FPS Breakdown

At 1920x1080, the system produces its highest frame rates across all settings. Low settings yield an average of 76 FPS, which is the only measured result that approaches smooth gameplay. Medium settings drop to 51 FPS average with a minimum of 44 FPS and maximum of 59 FPS, providing a playable but not consistently fluid experience. High settings average 43 FPS, and Ultra settings fall to 33 FPS. The spread between Low and Ultra at 1080p is 43 FPS, indicating that the GPU’s performance headroom is quickly exhausted as visual quality increases.

At 2560x1440, frame rates decline noticeably. Low settings average 53 FPS, a 30% reduction from 1080p. Medium settings average 35 FPS with a minimum of 30 FPS and maximum of 41 FPS, meaning even the peak frame time does not reach 60 FPS. High settings average 30 FPS, and Ultra settings drop to 23 FPS. None of the 1440p results provide consistently smooth gameplay, and even the Low preset with 53 FPS will exhibit stutter during demanding scenes with multiple players or complex base structures.

At 3840x2160, the system’s limitations become extreme. Low settings average 31 FPS, which is barely playable in a game that requires quick camera movements. Medium settings average 21 FPS with a minimum of 18 FPS and maximum of 24 FPS, creating a consistently choppy experience. High settings average 18 FPS, and Ultra settings average 13 FPS, both of which are effectively unplayable for any serious gaming session. The 4K results across all settings show that this combo cannot deliver an acceptable frame rate at this resolution, regardless of how much visual quality is sacrificed.

Comparing settings within each resolution, the penalty for moving from Low to Ultra is substantial. At 1080p, Ultra is 57% slower than Low (76 FPS vs 33 FPS). At 1440p, Ultra is 57% slower (53 FPS vs 23 FPS). At 4K, Ultra is 58% slower (31 FPS vs 13 FPS). This consistent 57-58% penalty across resolutions indicates that the GPU’s fixed resources are being consumed by the same relative proportion of additional visual effects, regardless of pixel count.

CPU Role

The AMD Ryzen 7 9800X3D is a high-end desktop processor that is vastly more capable than what this GPU pairing allows it to demonstrate. With 8 cores and 16 threads based on the Zen 5 architecture (Granite Ridge), it features a base clock of 4.70 GHz and a boost clock of 5.20 GHz. The 96 MB of shared L3 cache is a standout feature for gaming workloads, as Rust’s world simulation and entity tracking can benefit from large caches to reduce memory latency. The CPU’s 3DMark single-thread score of 1212 and multi-thread score of 10067 indicate strong per-core performance, which is critical for Rust’s main game thread that handles player input and world updates.

Synthetic benchmarks reinforce the CPU’s capability. Cinebench R23 multicore of 23230 and singlecore of 2080 place it among the top processors for both heavily threaded and lightly threaded workloads. Geekbench multicore of 18696 and singlecore of 2964 confirm this trend. Passmark tests show 116709 in integer math, 79456 in floating point math, and 40009 in multithread score, all of which are strong for a desktop CPU. The CPU’s percentile of 87 versus all CPUs, with an average benchmark score of 39768, places it well above the median, and its nearest rivals are all within 1% of its average score, indicating it sits in a tight competitive cluster of high-performance processors.

Despite this CPU strength, the measured Rust frame rates never come close to what the processor could support. Even at 1080p Low with 76 FPS, the game is not CPU-bound, as evidenced by the fact that dropping to 4K Low reduces frames to 31 FPS, a scenario where the CPU has far less work to do per frame but the GPU is overwhelmed. The CPU’s 16 threads are more than sufficient for Rust’s multithreaded rendering pipeline, and the 5.20 GHz boost clock ensures that any single-threaded bottlenecks in the game’s update loop are unlikely to manifest. The data shows that the CPU is essentially idle waiting for the GPU, which is the opposite of the balance point a well-matched system would achieve.

Settings Recommendations

Based on the measured frame rates, the only settings preset that delivers a consistently playable experience is 1920x1080 with Low settings, averaging 76 FPS. This is the sole configuration where the system exceeds the 60 FPS threshold that many players consider the minimum for smooth gameplay in a fast-paced survival game. At this setting, the game will be responsive enough for combat and building, though visual quality will be noticeably reduced with simpler textures, lower draw distances, and fewer ambient effects.

For players who prioritize visual fidelity over frame rate, 1920x1080 with Medium settings offers a compromise at 51 FPS average, with a minimum of 44 FPS and maximum of 59 FPS. This stays above 40 FPS for the most part, which can be acceptable for slower-paced activities like gathering resources or exploring, but may feel less responsive during PvP encounters. The Medium preset at 1080p is the highest quality setting that remains above 30 FPS on average, making it the ceiling for this combo in terms of playability.

At 2560x1440, the Low preset with 53 FPS average is the only viable option, though it still falls short of 60 FPS and will exhibit occasional dips below 50 FPS during heavy scenes. The Medium preset at 1440p with 35 FPS average is marginal at best, and the High and Ultra presets at 30 FPS and 23 FPS respectively are not recommended for active gameplay. At 3840x2160, no settings preset delivers a playable experience; even Low at 31 FPS will feel sluggish, and Medium at 21 FPS or High at 18 FPS are only suitable for taking screenshots or observing static scenes.

The data clearly indicates that this combo should be used at 1080p resolution. The jump from 1080p Low (76 FPS) to 1440p Low (53 FPS) costs 23 FPS, and the jump to 4K Low (31 FPS) costs another 22 FPS. Given that the GPU is the limiting factor, players should prioritize resolution over settings: running 1080p Low provides double the frame rate of 4K Low, and 1080p Medium (51 FPS) still outperforms 1440p Low (53 FPS) while offering better visual quality. The worst possible choice is 4K Ultra at 13 FPS, which combines the highest pixel count with the most demanding settings to produce an unplayable slideshow. For any practical gaming use, the recommendation is to stay at 1080p, choose Low or Medium settings based on whether frame rate or visuals matter more, and avoid 1440p and 4K entirely unless the user accepts sub-30 FPS performance.