Rust

The AMD Radeon RX 6750 XT paired with the Intel Core i5-9400 delivers a solid 1080p experience in Rust, but the data shows a steep performance cliff as resolution climbs, with 4K Ultra dropping to just 32.1 FPS. This combination ranks in the 48th percentile of tested systems, indicating a mid-pack performer that is clearly more capable at lower resolutions than at the high end.

FAQ

Q: What is the best resolution to play Rust with this combo?

A: The data shows 1920x1080 is the sweet spot, with all settings presets averaging above 78 FPS. At 2560x1440, performance drops below 60 FPS on Ultra, while 3840x2160 only manages playable frame rates on Low settings.

Q: How does the RX 6750 XT compare to its nearest rivals in raw GPU benchmarks?

A: The RX 6750 XT scores 35,327 on average, placing it virtually tied with the AMD Radeon RX 5600M (35,264, 0.2% faster). It trails the NVIDIA GeForce RTX 3080 by 1.3% (35,787) and the AMD Radeon 880M by 0.9% (35,646), while leading the NVIDIA GeForce RTX 5070 Ti Mobile by 0.3%.

Q: Is the i5-9400 a bottleneck in Rust?

A: Not at lower resolutions. At 1080p Low, the combo reaches 143.9 FPS, suggesting the CPU can feed the GPU adequately. But at 4K Ultra, the 32.1 FPS result indicates the workload shifts heavily to the GPU, where the RX 6750 XT's performance limits the frame rate.

Q: What is the GPU's VRAM capacity and how does it relate to Rust?

A: The RX 6750 XT has 12 GB of GDDR6 memory with a 192-bit bus and 432.0 GB/s bandwidth. This capacity is sufficient for Rust's large open-world textures, as seen in the 70.9 FPS average at 1440p High, but the 4K Ultra result of 32.1 FPS suggests memory bandwidth constraints at extreme settings.

Q: How does the CPU's core and thread count influence performance?

A: The i5-9400 has 6 cores and 6 threads, with a base clock of 2.90 GHz and boost up to 4.10 GHz. Its Cinebench R23 multicore score of 7,969 places it in the 50th percentile of all CPUs, which is adequate for Rust's simulation-heavy gameplay but not exceptional for high-refresh-rate 1080p gaming.

Q: Which settings preset offers the best balance of quality and performance at 1440p?

A: At 2560x1440, the Medium preset delivers 82 FPS, which is a 15.7% improvement over High (70.9 FPS) while still looking better than Low (116.7 FPS). This makes Medium the recommended choice for a smooth 1440p experience.

How This Combo Ranks

The Intel Core i5-9400 + AMD Radeon RX 6750 XT combination ranks 883rd out of 1,717 tested combos in Rust, placing it in the 51.4th percentile of all systems. This is a mid-table position, confirming that this is a capable but not top-tier pairing for this game. The ranking reflects a balance where the GPU is strong enough for high-refresh 1080p gaming, but the CPU's 6-core/6-thread design limits performance in CPU-bound scenarios typical of Rust's multiplayer servers.

Compared to the GPU's standalone percentile of 79 (meaning it outperforms 79% of all GPUs), the combo's 48.6% rank is noticeably lower. This delta suggests the i5-9400, which sits in the 50th percentile of CPUs, holds back the RX 6750 XT from achieving its full potential in Rust. The gap is most evident in the 1080p Low preset, where the combo hits 143.9 FPS — good, but not exceptional for a GPU that can push 116.7 FPS at 1440p Low.

The CPU's nearest rivals show a tight cluster: the i3-10305 (2,300 avg score, 0.2% faster) and i3-1125G4 (2,299, 0.2% faster) are essentially identical, while the Xeon E-2134 (2,295, 0.4% faster) and i7-8809G (2,319, 0.6% slower) round out the group. This means any of these CPUs would produce nearly identical Rust performance, so the bottleneck is more about the 6-thread limit than the specific chip.

Settings Recommendations

For the best overall experience, the 1080p Medium preset is the clear winner, delivering 117.5 FPS. This provides a smooth frame rate that is 19.4% higher than High (98.4 FPS) and only 22.4% lower than Low (143.9 FPS), while offering significantly better visual fidelity. The Ultra preset at 1080p drops to 78.1 FPS, which is still playable but not ideal for competitive play.

At 1440p, the Medium preset at 82 FPS is the recommended choice. It maintains a comfortable margin above 60 FPS, unlike High (70.9 FPS) which is close to the playability threshold, and Ultra (48.9 FPS) which is too low for action-heavy gameplay. The Low preset at 116.7 FPS is an option for maximum performance, but the visual quality loss is substantial.

For 4K, the data strongly recommends sticking with Low settings at 70.1 FPS. Medium (47.4 FPS), High (40 FPS), and Ultra (32.1 FPS) all fall below the 60 FPS threshold, making them unsuitable for smooth gameplay. The Low preset is the only viable 4K option, and even then, it sacrifices most graphical features.

Measured FPS Breakdown

At 1920x1080, the combo delivers its best results. The Low preset achieves 143.9 FPS, followed by Medium at 117.5 FPS, High at 98.4 FPS, and Ultra at 78.1 FPS. The scaling from Low to Ultra represents a 45.7% performance drop, which is substantial but expected given the increased rendering workload.

Moving to 2560x1440, the frame rates decrease noticeably. Low still performs well at 116.7 FPS, but Medium drops to 82 FPS (-29.7% vs 1080p Medium), High falls to 70.9 FPS (-28.0% vs 1080p High), and Ultra drops to 48.9 FPS (-37.4% vs 1080p Ultra). The 1440p Ultra result is below the 60 FPS playability threshold.

At 3840x2160, the performance degrades sharply. Low settings yield 70.1 FPS, which is the only playable preset. Medium drops to 47.4 FPS, High to 40 FPS, and Ultra to 32.1 FPS. The gap between Low and Ultra at 4K is 54.2%, showing that the GPU struggles significantly with the higher resolution.

GPU Role

The RX 6750 XT is the dominant component in this pairing, as evidenced by its 79th percentile ranking among all GPUs. Its 12 GB of GDDR6 memory is ample for Rust's large texture maps, and the 432.0 GB/s bandwidth helps maintain data flow. The GPU's boost clock of 2600 MHz and 2560 shading units provide substantial compute power, reflected in its PassMark G3D score of 20,700.

The GPU's role becomes more apparent at higher resolutions. At 4K, the frame rate drops from 70.1 FPS (Low) to 32.1 FPS (Ultra), a 54.2% reduction that highlights the GPU's struggle with pixel throughput. The 64 ROPs and 166.4 GPixel/s pixel rate are insufficient for 4K Ultra in Rust's demanding environment. In contrast, the 1080p results show the GPU has headroom, with Low hitting 143.9 FPS.

The GPU's nearest rival comparisons show it's a strong mid-range performer. It outperforms the RTX 5070 Ti Mobile by 0.3% and the RX 5600M by 0.2%, while trailing the RTX 3080 by 1.3% and the Radeon 880M by 0.9%. This places it in a competitive tier where small deltas translate to minimal real-world differences in Rust.

CPU Role

The i5-9400 provides a solid but not exceptional foundation for Rust. Its 6 cores and 6 threads are sufficient for the game's single-threaded simulation aspects, but the lack of hyper-threading limits multi-threaded performance. The CPU's Cinebench R23 multicore score of 7,969 and single-core score of 1,125 indicate moderate compute capability.

In practice, the CPU's influence is most visible at lower resolutions. At 1080p Low, the combo achieves 143.9 FPS, which suggests the i5-9400 can keep up with the GPU's output. However, the 50th percentile CPU ranking implies that a more powerful processor could push higher frame rates in CPU-bound scenarios, such as dense multiplayer bases or large raids.

The CPU's boost clock of 4.10 GHz is adequate for Rust's physics and AI calculations, but the 6-thread limit may cause stuttering in heavy moments. The 9 MB shared L3 cache helps mitigate some latency, but the dual-channel DDR4 memory at 42.7 GB/s bandwidth is a potential constraint in memory-intensive operations.

Resolution Scaling

The performance scaling from 1080p to 4K reveals a clear GPU-bound trend. At Low settings, the frame rate drops from 143.9 FPS at 1080p to 116.7 FPS at 1440p (-18.9%) and then to 70.1 FPS at 4K (-51.3% from 1080p). This steep decline at 4K is characteristic of a GPU that is overwhelmed by pixel count.

The scaling pattern is similar across all presets. At Medium, the drop is 30.2% from 1080p to 1440p (117.5 to 82 FPS) and then 59.7% from 1080p to 4K (117.5 to 47.4 FPS). At High, the drops are 28.0% and 59.3% respectively (98.4 to 70.9 to 40 FPS). At Ultra, the drops are 37.4% and 58.9% (78.1 to 48.9 to 32.1 FPS).

The consistent ~60% reduction from 1080p to 4K across all settings indicates that the GPU is the primary limiting factor at high resolutions. The i5-9400's role diminishes as resolution increases, since the GPU becomes saturated with pixel rendering. The 4K Low result of 70.1 FPS shows that even the most GPU-friendly settings cannot overcome the resolution's demands, confirming that this combo is best suited for 1080p and 1440p gaming.