Rust

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

The Intel Core Ultra X9 388H is a 16-core, 16-thread mobile processor based on the Panther Lake architecture, built on Intel's 3 nm process. It operates with a base clock of 2.10 GHz and a boost clock of 5.10 GHz, which is a substantial frequency range for a mobile part. The chip carries 18 MB of shared L3 cache, with 192 KB of L1 and 3 MB of L2 per core, and supports dual-channel LPDDR5X memory with a bandwidth of 153.6 GB/s.

In Rust, the CPU's role is significant because the game is known for heavy server-side simulation and entity updates, but the measured FPS data here reflects the entire system's performance. The processor's strong single-thread performance — evidenced by a Cinebench R23 single-core score of 2200.5 and a PassMark single-thread score of 4280 — helps maintain frame pacing in a game where draw calls and physics calculations can bottleneck lower-end CPUs. The multi-threaded capability, with a Cinebench R23 multi-core score of 18911 and a PassMark multithread score of 36811, ensures that background simulation tasks do not starve the render thread.

Looking at the CPU's percentile ranking, it sits at the 88th percentile versus all CPUs, indicating that it outperforms the vast majority of processors in the database. Its average benchmark score of 44466 places it in close competition with several notable rivals. The nearest rival, the AMD Ryzen 5 7500X3D, scores 44573, which is just 0.2% higher — a negligible difference. The Intel Core i9-13950HX trails by 0.3% at 44342, while the AMD Ryzen AI Max 385 is 0.4% behind at 44309, and the Intel Core i5-13600 is 0.5% behind at 44240.

This clustering suggests that the Core Ultra X9 388H delivers performance squarely in the upper mid-range of desktop and mobile processors, with no single rival holding a meaningful advantage in synthetic benchmarks. The 16-thread count, combined with the high boost clock, means the CPU is unlikely to be the primary limiter in Rust at lower resolutions, where the GPU can stretch its legs. At 1080p Low, the system reaches 140 FPS, which is a strong indicator that the CPU can feed frames well above typical display refresh rates.

The data also reveals that the CPU's cache hierarchy, particularly the 18 MB L3, is adequate for Rust's somewhat unpredictable memory access patterns. While the game does not use 3D V-Cache like the Ryzen 5 7500X3D, the measured scores show that the Core Ultra X9 388H keeps pace within 0.2% in aggregate benchmarks. This balance between clock speed and cache capacity appears sufficient for Rust's simulation-heavy gameplay, where consistent frame times matter more than raw core counts.

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

The AMD Radeon RX 7800M is a mobile GPU built on the RDNA 3.0 architecture, using the Navi 32 chip fabricated on TSMC's 5 nm process. It packs 12 GB of GDDR6 memory on a 192-bit bus, delivering a bandwidth of 432.0 GB/s. The GPU's base clock is 1295 MHz, with a game clock of 2145 MHz and a boost clock of 2335 MHz, while the memory runs at 2250 MHz (18 Gbps effective). The chip contains 3840 shading units, 240 texture mapping units, and 96 ROPs, along with 60 ray tracing cores, providing 35.87 TFLOPS of FP32 performance.

In Rust, the GPU's role becomes more pronounced at higher resolutions and settings. The 12 GB VRAM buffer is particularly relevant because Rust's large world textures and draw distances can consume significant memory, and the data shows that the GPU handles 4K High at 32 FPS, which is playable but not smooth. The memory bandwidth of 432.0 GB/s is adequate for the 192-bit bus, and the effective 18 Gbps speed helps maintain texture throughput in dense scenes.

The GPU's percentile ranking is 73rd versus all GPUs, with an average benchmark score of 27883. Its nearest rivals show tight competition: the AMD Radeon Pro Vega 20 scores 27839 (0.2% higher), the AMD Radeon Pro W5500X scores 27973 (0.3% lower), the NVIDIA GeForce GTX 980 Ti scores 28020 (0.5% lower), and the AMD FirePro S7150 scores 28117 (0.8% lower). This grouping indicates that the RX 7800M performs in the same tier as several older desktop flagship cards, which is notable for a mobile part.

The GPU's DirectX 12 performance, as measured by PassMark (score 89) and 3DMark Steel Nomad (score 2994), suggests that modern API usage in Rust — which supports DirectX 12 — benefits from the RDNA 3.0 architecture's feature set, including mesh shaders and improved async compute. The Vulkan score of 126668 in Geekbench further indicates strong low-level API performance, which can help in CPU-bound scenarios. However, the measured FPS data shows that at 4K Ultra, the system drops to 25 FPS, indicating that the GPU is heavily taxed at the highest settings and resolution.

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

The measured FPS data reveals a clear pattern of resolution scaling that illuminates the balance between CPU and GPU in this system. At 1080p Low, the system achieves 140 FPS, which is a high frame rate that suggests the CPU is capable of feeding the GPU without significant bottleneck. Moving to 1440p Low, the FPS drops to 96, a 31.4% decrease, while at 4K Low, it falls to 57, a further 40.6% drop from 1440p. This scaling is consistent with a GPU-bound scenario at lower settings, where the graphics card's fill rate and memory bandwidth become the limiting factors.

At Medium settings, the scaling is similar: 94 FPS at 1080p, 65 FPS at 1440p (a 30.9% drop), and 38 FPS at 4K (a 41.5% drop from 1440p). The consistency of these percentage drops across Low and Medium presets indicates that the GPU is the primary bottleneck at these settings, as the CPU's workload does not change dramatically with resolution. The fact that 1080p Medium (94 FPS) is close to 1440p Low (96 FPS) suggests that the GPU's rendering load is what drives performance, not the CPU.

At High settings, the pattern shifts slightly. 1080p High yields 79 FPS, 1440p High drops to 55 FPS (a 30.4% decrease), and 4K High falls to 32 FPS (a 41.8% decrease from 1440p). The absolute FPS values are lower than Medium, as expected, but the relative scaling remains similar. This consistency suggests that the GPU is still the limiting factor, but the lower FPS at 1080p High (79 FPS) compared to 1080p Low (140 FPS) indicates that the GPU's shading and texture work is more demanding at higher presets.

At Ultra settings, the scaling becomes more pronounced. 1080p Ultra yields 60 FPS, 1440p Ultra drops to 42 FPS (a 30% decrease), and 4K Ultra falls to 25 FPS (a 40.5% decrease from 1440p). The 4K Ultra result of 25 FPS is particularly telling — this is the only setting where the system dips below 30 FPS, which is often considered the minimum for playable frame rates. The data implies that at 4K Ultra, the GPU is overwhelmed, and the 12 GB VRAM may also be a factor if textures exceed memory capacity.

The overall pattern shows that the system is GPU-limited across all resolutions and settings, as the CPU's high single-thread and multi-thread scores are more than sufficient for Rust's demands. The fact that 1080p Low achieves 140 FPS while 4K Ultra only reaches 25 FPS — a 5.6x difference — underscores the GPU's dominance in this pairing. For users seeking higher frame rates at 4K, lowering settings to Low (57 FPS) or Medium (38 FPS) provides the most significant gains, while at 1080p, even Ultra remains playable at 60 FPS.

FAQ

Q: What is the best resolution for achieving 60+ FPS in Rust with this combo?

A: At 1080p, the system delivers 60 FPS on Ultra, 79 FPS on High, 94 FPS on Medium, and 140 FPS on Low. At 1440p, only Low (96 FPS) and High (55 FPS) come close to or exceed 60 FPS, with Medium at 65 FPS. At 4K, no preset reaches 60 FPS — the highest is Low at 57 FPS.

Q: How does the CPU compare to its nearest rival, the AMD Ryzen 5 7500X3D?

A: The Intel Core Ultra X9 388H has an average benchmark score of 44466, while the Ryzen 5 7500X3D scores 44573, a difference of just 0.2%. This places the two processors in the same performance tier, with neither holding a meaningful advantage in synthetic benchmarks.

Q: Is the GPU's 12 GB VRAM sufficient for Rust at 4K?

A: The measured data shows that at 4K High, the system achieves 32 FPS, and at 4K Ultra, it drops to 25 FPS. While the VRAM may be adequate for the game's textures, the GPU's compute and memory bandwidth appear to be the limiting factors at this resolution, as even Low settings only reach 57 FPS.

Q: What is the FPS difference between Low and Ultra settings at 1440p?

A: At 1440p, Low settings yield 96 FPS, while Ultra settings yield 42 FPS. This represents a 54 FPS difference, or a 56.3% reduction in performance when moving from the lowest to the highest preset.

Q: How does the GPU rank against the NVIDIA GeForce GTX 980 Ti?

A: The AMD Radeon RX 7800M has an average benchmark score of 27883, while the GTX 980 Ti scores 28020, which is 0.5% higher. This means the two GPUs are essentially equivalent in aggregate performance, despite the RX 7800M being a mobile part.

Q: What is the combo's ranking among all tested combinations in Rust?

A: The combo ranks 1958 out of 2953 tested combinations, placing it in the 33.7th percentile of all combos, meaning roughly two-thirds of tested systems perform better in this game.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend on the user's target resolution and frame rate preference. For 1080p gaming, the data shows that Ultra settings deliver 60 FPS, which is exactly at the threshold for smooth gameplay on a 60 Hz display. High settings at 79 FPS provide additional headroom, while Medium at 94 FPS offers a comfortable margin for 75 Hz or 90 Hz displays. Low at 140 FPS is ideal for competitive play where maximum frame rate is prioritized over visual fidelity.

At 1440p, the data suggests that Medium settings (65 FPS) provide the best balance between visual quality and smoothness, as High drops to 55 FPS and Ultra falls to 42 FPS. Low at 96 FPS is the only preset that significantly exceeds 60 FPS, making it suitable for high refresh rate 1440p monitors, but the visual compromise may be substantial. For users who prefer higher visual quality, Medium is the recommended preset, as it maintains a playable frame rate without the steep drop seen at High or Ultra.

At 4K, the data reveals that no preset achieves 60 FPS, with Low at 57 FPS being the closest. Medium at 38 FPS and High at 32 FPS are playable but may feel sluggish in fast-paced combat, while Ultra at 25 FPS is generally not recommended for a smooth experience. For 4K users, Low settings are the only viable option for near-60 FPS gameplay, while Medium could be acceptable for less demanding scenarios.

The Medium preset across all resolutions offers the most consistent scaling: 94 FPS at 1080p, 65 FPS at 1440p, and 38 FPS at 4K. This preset provides a good balance of visual features and performance, and the measured minimum FPS values (80 at 1080p, 55 at 1440p, 32 at 4K) indicate that frame pacing remains stable even in demanding scenes. Overall, Medium is the recommended preset for users who want a reliable experience without the performance penalties of High or Ultra.

Measured FPS Breakdown

At 1080p, the data shows a clear progression across presets. Low settings achieve 140 FPS average, which is the highest measured value for this combo. Medium settings deliver 94 FPS average, with a minimum of 80 FPS and a maximum of 108 FPS, indicating a stable frame rate range. High settings yield 79 FPS average, while Ultra settings produce 60 FPS average. The spread from Low to Ultra is 80 FPS, demonstrating that the GPU's workload scales significantly with preset quality.

At 1440p, the measured values are lower but follow a similar pattern. Low settings reach 96 FPS average, Medium delivers 65 FPS average with a minimum of 55 FPS and a maximum of 74 FPS, High yields 55 FPS average, and Ultra drops to 42 FPS average. The difference between Low and Ultra is 54 FPS, which is a smaller absolute spread than at 1080p but a similar relative reduction. The Medium preset's minimum of 55 FPS suggests that even in demanding scenes, the frame rate stays within a playable range.

At 4K, the data shows the most significant performance impact. Low settings achieve 57 FPS average, Medium delivers 38 FPS average with a minimum of 32 FPS and a maximum of 44 FPS, High yields 32 FPS average, and Ultra drops to 25 FPS average. The Medium preset's minimum of 32 FPS is the lowest measured value across all resolutions and settings, indicating that 4K gaming with this combo requires careful settings management to maintain playable frame rates.

The Medium preset is the only one with complete min/max data across all resolutions, providing insight into frame time consistency. At 1080p, the min/max range is 80-108 FPS (a 28 FPS spread), at 1440p it is 55-74 FPS (a 19 FPS spread), and at 4K it is 32-44 FPS (a 12 FPS spread). This narrowing range at higher resolutions suggests that the GPU becomes more consistently utilized, reducing frame time variance even as average FPS drops.

How This Combo Ranks

The combo of the Intel Core Ultra X9 388H and AMD Radeon RX 7800M ranks 1958 out of 2953 tested combinations in Rust, placing it in the lower-middle portion of the database. This ranking indicates that while the individual components are capable — the CPU at the 88th percentile and the GPU at the 73rd percentile — the combination does not boost the system to the upper echelons of Rust performance. The rank of 1958 means that 995 combinations perform worse, while 1957 combinations perform better, suggesting that this system is better suited for 1080p or 1440p gaming rather than 4K.

The CPU's performance relative to its nearest rivals is nearly identical, with the Ryzen 5 7500X3D just 0.2% higher, the Core i9-13950HX 0.3% lower, the Ryzen AI Max 385 0.4% lower, and the Core i5-13600 0.5% lower. This grouping puts the Core Ultra X9 388H in a tight cluster where synthetic benchmark scores do not meaningfully differentiate between processors. However, in Rust, the CPU's single-thread performance may be more relevant than its multi-thread scores, and the 2200.5 Cinebench R23 single-core result indicates strong per-thread capability.

The GPU's ranking relative to its nearest rivals shows a similar clustering: the Radeon Pro Vega 20 is 0.2% higher, the Radeon Pro W5500X is 0.3% lower, the GTX 980 Ti is 0.5% lower, and the FirePro S7150 is 0.8% lower. This places the RX 7800M in a performance tier that includes several older desktop GPUs, which is notable for a mobile part but also explains why the system does not rank higher in Rust — the game's rendering demands at high settings can overwhelm this level of GPU performance.

The combo's rank of 1958 out of 2953 suggests that users with this system should target 1080p Medium or High settings for the best experience, as the data shows that 4K Ultra (25 FPS) is not viable for smooth gameplay. The CPU's strong performance ensures that the system is never CPU-bound at any resolution, but the GPU becomes the limiting factor as resolution and settings increase. For users who prioritize frame rate over visual quality, the 1080p Low preset at 140 FPS provides the best competitive advantage, while those seeking a balance between visuals and performance should consider 1440p Medium at 65 FPS.