Rust

The Intel Core i5-10400F paired with the NVIDIA GeForce RTX 4070 presents a compelling data set for Rust, a survival title known for its demanding simulation and rendering loads. The measured FPS across resolutions and settings reveals a system where the GPU is the primary bottleneck at higher fidelity, while the CPU’s six-core configuration becomes increasingly relevant at lower resolutions. This analysis breaks down the measured performance, contextualizes the combo’s standing among 1,717 tested configurations, and examines the CPU’s specific role in the game’s results.

Resolution Scaling

The FPS drop from 1080p to 4K is severe and consistent across all settings, confirming that the RTX 4070 is the limiting component at higher resolutions. At High settings, the average frame rate falls from 121.9 FPS at 1920x1080 to 89.3 FPS at 2560x1440, a reduction of 32.6 FPS, and then to 51.2 FPS at 3840x2160, a further drop of 38.1 FPS. This trajectory indicates that the GPU’s rasterization and memory bandwidth are being saturated as pixel count increases.

The scaling pattern is even more pronounced at Ultra settings, where the 4K average of 37.2 FPS is less than half of the 1080p average of 94.9 FPS. This suggests that the most demanding visual features impose a heavy cost on the Ada Lovelace architecture at 4K, with the 12 GB GDDR6X memory and 504.2 GB/s bandwidth struggling to maintain fluidity. Conversely, the gap between 1080p and 1440p is smaller, with a 32.6 FPS difference at High, indicating that 1440p remains a viable target for this combination.

The data also shows that lowering settings from Ultra to Low yields significant gains at all resolutions. At 4K, the average FPS jumps from 37.2 to 88.9, a 51.7 FPS improvement. This indicates that Rust’s Ultra preset introduces effects that are disproportionately expensive on the RTX 4070, and that the GPU’s raw compute (29.15 TFLOPS FP32) can be better utilized with reduced graphical load. The scaling from Low to Medium to High is more gradual, suggesting that the GPU remains the primary constraint even as the CPU load increases with higher settings.

How This Combo Ranks

In the comprehensive database of tested combos, this specific pairing of the i5-10400F and RTX 4070 achieves a rank of 606 out of 1,717 configurations for Rust. This placement in the 35th percentile of all tested systems indicates that while the combo delivers playable performance, it is not among the top-tier configurations for this specific title. The ranking reflects a balance between the CPU’s mid-range standing and the GPU’s high-end capabilities.

The CPU’s percentile vs. all CPUs is 73, while the GPU’s is 81, suggesting that the processor is the weaker link in this pairing. This is corroborated by the CPU’s benchmark scores, which show a single-thread score of 688 in 3DMark and a multi-thread score of 4,748 in the 16-thread test. These scores place the i5-10400F in the same performance neighborhood as the AMD EPYC 7552 (deltaPct 0.4) and the AMD Ryzen 3 7320C (deltaPct -0.8), indicating that its compute capabilities are solid but not exceptional for a modern gaming workload.

Compared to the GPU’s nearest rivals, the RTX 4070 is slightly behind the AMD Radeon RX Vega 56 (deltaPct -0.6) and the NVIDIA GeForce MX570 A (deltaPct -1.9) in average benchmark score, but ahead of the AMD Radeon RX 5300M (deltaPct 2.5). This suggests that the GPU’s raw performance is competitive, but the combo’s overall rank in Rust is likely dragged down by the CPU’s inability to feed the GPU at lower resolutions where the processor becomes the bottleneck.

CPU Role

The Intel Core i5-10400F is a 6-core, 12-thread processor based on the Comet Lake architecture, built on Intel’s 14 nm process. Its base clock of 2.90 GHz and boost clock of 4.30 GHz are moderate by modern standards, and its 12 MB of shared L3 cache is the only cache level shared across all cores. For Rust, a game that often relies on single-threaded performance for its simulation logic, the CPU’s single-thread capabilities are critical.

Benchmark data shows a 3DMark single-thread score of 688 and a Cinebench R20 single-core score of 610, which are respectable but not leading-edge numbers. In contrast, the multi-threaded scores are more robust: Cinebench R23 multi-core at 10,297 and Passmark multithread at 12,115. This indicates that the i5-10400F can handle parallel workloads well, but Rust’s actual performance may be limited by its single-thread performance, especially when the GPU is not the bottleneck.

The measured FPS at 1080p Low (147.1 FPS) versus 1080p Ultra (94.9 FPS) shows a 52.2 FPS difference, with the lower setting likely allowing the CPU to become the primary limiter. At 1080p Low, the RTX 4070 has ample headroom, and the i5-10400F’s 6 cores must keep up with the game’s physics and entity updates. The fact that the FPS does not scale linearly with resolution at Low settings (129.2 FPS at 1440p vs. 147.1 FPS at 1080p) suggests that the CPU is holding performance back from reaching higher frame rates, as the GPU’s load decreases.

The CPU’s memory bandwidth of 42.7 GB/s and dual-channel DDR4 support are adequate but not exceptional. For a game like Rust, which can be sensitive to memory latency and bandwidth, this may contribute to the observed frame rate ceilings. The lack of an integrated GPU means the system relies entirely on the RTX 4070 for display output, which is standard for a gaming configuration.

Measured FPS Breakdown

The measured FPS data provides a granular view of performance across three resolutions and four settings presets. At 1920x1080, the average FPS ranges from 147.1 at Low to 94.9 at Ultra. The jump from Low to Medium is small (147.1 to 127.4), and from Medium to High it is even smaller (127.4 to 121.9), indicating that the CPU is the primary limiter at this resolution. The Ultra preset introduces a significant drop to 94.9 FPS, showing that the GPU’s workload becomes more demanding but still leaves the CPU as a constraint.

At 2560x1440, the average FPS ranges from 129.2 at Low to 64.9 at Ultra. The difference between Low and Medium is 25.4 FPS, and between Medium and High it is 14.5 FPS. This suggests that as resolution increases, the GPU begins to take on a larger share of the rendering burden, but the CPU is still capable of delivering high frame rates at lower settings. The Ultra preset at 1440p (64.9 FPS) is the first point where the GPU’s limitations become apparent, as the frame rate drops below the 70 FPS threshold.

At 3840x2160, the average FPS ranges from 88.9 at Low to 37.2 at Ultra. The scaling here is steep: Low to Medium drops by 26.3 FPS, Medium to High by 11.4 FPS, and High to Ultra by 14.0 FPS. This indicates that the RTX 4070 is the sole bottleneck at 4K, with the CPU’s role diminishing as the GPU struggles to process the increased pixel count. The 4K Low result of 88.9 FPS is the only playable result at this resolution, while Ultra at 37.2 FPS is not suitable for smooth gameplay.

FAQ

Q: What is the best resolution and settings combo for this system?

A: The data shows that 2560x1440 at High settings provides an average FPS of 89.3, which is a good balance between visual quality and performance. At 1920x1080, High settings yield 121.9 FPS, but the CPU becomes the limiting factor, preventing higher frame rates at lower settings.

Q: How does the CPU affect performance at 1080p?

A: At 1920x1080, the FPS difference between Low (147.1) and High (121.9) is only 25.2 FPS, while the difference between High and Ultra is 27 FPS. This suggests that the i5-10400F’s single-thread performance limits the system, as the GPU has headroom to render more frames.

Q: Is the RTX 4070 sufficient for 4K gaming in Rust?

A: The measured data shows that at 3840x2160, only the Low preset (88.9 FPS) is above 60 FPS. High settings average 51.2 FPS, and Ultra drops to 37.2 FPS, indicating that the GPU is not powerful enough for consistent high-refresh 4K gameplay with this CPU.

Q: How does this combo compare to other tested configurations?

A: This combo ranks 606 out of 1,717 tested combos for Rust. The CPU’s percentile (73) is lower than the GPU’s (81), suggesting that the processor is the weaker component, which aligns with the 1080p results where the CPU limits performance.

Q: What is the CPU’s multi-threaded performance like?

A: The i5-10400F scores 10,297 in Cinebench R23 multi-core and 4,748 in 3DMark 16-thread. These scores are within 1.2% of rivals like the AMD Ryzen 3 7320C and Intel Core i5-8500, indicating that its parallel processing is solid for a 6-core part.

Q: Does the GPU’s memory bandwidth matter for this game?

A: The RTX 4070 has 12 GB of GDDR6X memory with a bandwidth of 504.2 GB/s. At 4K Ultra, the average FPS drops to 37.2, which is likely due to the memory subsystem being saturated, as the GPU’s 64 ROPs and 158.4 GPixel/s pixel rate are insufficient for the load.