Rust

Resolution Scaling

The measured FPS data for Rust shows a clear pattern: this combo is heavily CPU-limited at lower resolutions, with the GPU headroom only becoming apparent at 4K. From 1080p Low (131.3 FPS) to 4K Low (97.6 FPS), the drop is only 25.7% despite a 4x increase in pixel count. This modest scaling indicates the Ryzen 5 2600 is the primary bottleneck at 1080p, as the RTX 4090 is capable of far higher frame rates in less CPU-bound scenarios.

At Medium settings, the resolution scaling is more pronounced: 113.0 FPS at 1080p falls to 97.9 FPS at 1440p, then to 81.9 FPS at 4K. This represents a 27.5% total drop from 1080p to 4K, still relatively gentle. The High preset shows similar behavior, going from 106.5 FPS at 1080p to 91.5 FPS at 1440p and finally 75.7 FPS at 4K — a 28.9% reduction across the full range.

The Ultra preset tells a different story. At 4K Ultra, the combo delivers just 53.5 FPS, which is 45.0% lower than 1080p Ultra's 97.4 FPS. This steeper scaling suggests that at 4K Ultra, the RTX 4090's workload finally becomes significant enough to matter, though the absolute frame rate remains low. The 1440p Ultra result of 85.0 FPS sits between the 1080p and 4K values, confirming a gradual shift from CPU-bound to GPU-bound behavior as resolution increases.

The data indicates that at 1080p and 1440p across all settings, the Ryzen 5 2600's 6 cores and 12 threads are the limiting factor. The 4090's immense compute resources are simply waiting on CPU-delivered draw calls and game logic. At 4K, especially on Ultra, the GPU begins to share the load, yet the combination still cannot push past 97.6 FPS even on Low settings, underscoring how the older Zen architecture holds back this flagship GPU.

CPU Role

The AMD Ryzen 5 2600 is a 6-core, 12-thread processor from the 2000 series, based on the Zen architecture (specifically Zen+ Pinnacle Ridge). It operates at a base clock of 3.40 GHz and boosts to 3.90 GHz, with 16 MB of shared L3 cache. In synthetic benchmarks, this CPU scores 11,186 in Cinebench R23 multi-core and 1,579 in single-core, placing it in the 77th percentile of all CPUs tested.

Benchmark results indicate this processor is the dominant constraint in Rust at lower resolutions. At 1080p Low, the combo achieves 131.3 FPS, but the gap between Low and Ultra at the same resolution is only 33.9 FPS (131.3 vs 97.4). If the GPU were the bottleneck, changing settings would produce a much larger spread. Instead, the modest spread confirms that CPU-bound game logic — including Rust's notorious server-side simulation and entity processing — limits frame rates regardless of graphics quality.

The Ryzen 5 2600's nearest rivals in average benchmark score include the Intel Core i5-1345U (0.4% higher score), AMD Ryzen 5 7530U (0.6% lower), Intel Core i5-11600KF (0.6% higher), and Intel Core i7-10700F (0.7% higher). These deltas are all within 1%, meaning the 2600 is competitive with these mid-range parts in general compute, but Rust's single-thread sensitivity exposes its older architecture. The single-core Cinebench R23 score of 1,579 is modest by modern standards, and Rust's heavy reliance on a primary simulation thread means this directly caps achievable FPS.

At 4K, the CPU still matters. The frame rate at 4K Low (97.6 FPS) is only 25.7% lower than 1080p Low, but the absolute value remains far below what the RTX 4090 could deliver in a balanced system. For this game, the 2600's 12 threads and 3.90 GHz boost clock are insufficient to fully utilize the GPU's capabilities, particularly in high-population servers where CPU load increases further.

Settings Recommendations

Based on the measured FPS rows, the optimal settings depend on the target resolution and desired frame rate. At 1080p, the Low preset delivers 131.3 FPS, which is the highest result across all configurations. Medium yields 113.0 FPS, High produces 106.5 FPS, and Ultra drops to 97.4 FPS. For competitive play where high frame rates matter, Low at 1080p is the clear choice, offering a 15.9% improvement over Medium.

At 1440p, Low again leads with 114.2 FPS, followed by Medium at 97.9 FPS, High at 91.5 FPS, and Ultra at 85.0 FPS. The jump from Low to Medium costs 16.3 FPS, which is a significant sacrifice for modest visual gains. High and Ultra are within 6.5 FPS of each other, so if visual fidelity is a priority, Ultra at 1440p (85.0 FPS) remains playable.

At 4K, the situation changes. Low delivers 97.6 FPS, Medium 81.9 FPS, High 75.7 FPS, and Ultra just 53.5 FPS. The Ultra preset at 4K is the only configuration that falls below 60 FPS, making it unsuitable for smooth gameplay. Medium at 4K (81.9 FPS) offers a reasonable balance, while Low at 4K (97.6 FPS) provides the best frame rate at that resolution.

For the best experience per the measured rows, 1440p Low (114.2 FPS) stands out as the sweet spot: it delivers high frame rates while offering more screen real estate than 1080p. If visual quality is paramount, 1440p Ultra (85.0 FPS) is the highest-fidelity preset that maintains a playable frame rate. The data does not support 4K Ultra (53.5 FPS) as a viable option for this combination.

How This Combo Ranks

The AMD Ryzen 5 2600 + NVIDIA GeForce RTX 4090 combination ranks 560th out of 1,717 tested combos in Rust, placing it in the 32.6th percentile. This is a surprisingly low ranking given the GPU's capabilities, and the data makes the reason clear: the CPU bottleneck prevents the 4090 from performing anywhere near its potential.

In isolation, the RTX 4090 sits in the 91st percentile of all GPUs, with an average benchmark score of 66,473. Its nearest rivals include the NVIDIA Tesla T4 (0.4% higher), Tesla P40 (0.5% lower), AMD Radeon Pro Vega 56 (0.9% higher), and Quadro P6000 (1.3% higher). The Ryzen 5 2600, meanwhile, is in the 77th percentile of CPUs with an average score of 19,616.

The combination of a top-10 percentile GPU with a mid-range CPU from 2018 results in a combo rank that is far lower than either component's individual standing. This is typical of CPU-bound games like Rust, where the simulation and network code dominate performance. The measured FPS data confirms this: even at 4K Low, the combo only reaches 97.6 FPS, which is below what a more balanced pairing (e.g., a modern 8-core CPU with a mid-range GPU) might achieve at lower cost.

The 560th rank out of 1,717 combos suggests that most other tested configurations — including those with significantly weaker GPUs but better CPUs — outperform this pairing in Rust. This is an important consideration for anyone evaluating this hardware combination specifically for this game.

FAQ

Q: Is this combo good for Rust at 1080p?

A: Yes, the data shows 131.3 FPS on Low and 106.5 FPS on High at 1920x1080, which are playable frame rates. However, the CPU limits performance, as evidenced by the modest spread between Low and Ultra (33.9 FPS).

Q: Can this combo handle 4K gaming in Rust?

A: At 4K, Low settings deliver 97.6 FPS and Medium delivers 81.9 FPS, which are playable. Ultra at 4K drops to 53.5 FPS, which falls below the 60 FPS threshold for smooth gameplay.

Q: Why are the frame rates so similar across resolutions?

A: Benchmark results indicate the Ryzen 5 2600 is the limiting component. From 1080p Low (131.3 FPS) to 4K Low (97.6 FPS), the drop is only 25.7%, suggesting the GPU has significant headroom that the CPU cannot feed.

Q: How does the Ryzen 5 2600 compare to its nearest rivals in CPU benchmarks?

A: The 2600 scores 19,616 on average, with the Intel Core i5-1345U scoring 0.4% higher, the AMD Ryzen 5 7530U scoring 0.6% lower, the Intel Core i5-11600KF scoring 0.6% higher, and the Intel Core i7-10700F scoring 0.7% higher.

Q: What settings should I use for the best frame rate?

A: The data shows 1080p Low (131.3 FPS) is the fastest configuration. For a balance of resolution and speed, 1440p Low (114.2 FPS) is recommended. At 4K, Low (97.6 FPS) is the fastest option.

Q: Is the RTX 4090 wasted in this pairing?

A: The GPU is in the 91st percentile of all GPUs, but the combo ranks only 560th out of 1,717 in Rust. The CPU bottleneck prevents the 4090 from fully expressing its power, particularly at 1080p and 1440p.

Measured FPS Breakdown

The measured FPS data spans three resolutions and four settings presets. At 1920x1080, the combo achieves 131.3 FPS on Low, 113.0 FPS on Medium, 106.5 FPS on High, and 97.4 FPS on Ultra. The spread from Low to Ultra is 33.9 FPS, with each preset step costing roughly 8-16 FPS.

At 2560x1440, Low delivers 114.2 FPS, Medium 97.9 FPS, High 91.5 FPS, and Ultra 85.0 FPS. The total spread here is 29.2 FPS, slightly smaller than at 1080p, indicating a marginal shift toward GPU limitation as pixel count rises.

At 3840x2160, Low produces 97.6 FPS, Medium 81.9 FPS, High 75.7 FPS, and Ultra 53.5 FPS. The Ultra preset at 4K shows a dramatic 22.2 FPS drop from High, which is the largest single-step decline in the entire dataset. This suggests that at 4K Ultra, the RTX 4090's memory bandwidth and compute resources become the limiting factor, whereas at lower resolutions the CPU dominates.

Comparing across resolutions at the same setting: Low goes from 131.3 (1080p) to 114.2 (1440p) to 97.6 (4K), a 25.7% total drop. Medium goes from 113.0 to 97.9 to 81.9, a 27.5% drop. High goes from 106.5 to 91.5 to 75.7, a 28.9% drop. Ultra goes from 97.4 to 85.0 to 53.5, a 45.0% drop. The increasing percentage drops at higher settings confirm that the GPU takes on more responsibility as both resolution and quality increase.

GPU Role

The NVIDIA GeForce RTX 4090 is the flagship of the GeForce 40-series, built on the Ada Lovelace architecture using a 5 nm process at TSMC. It features 16,384 shading units, 512 texture mapping units, and 176 ROPs, with 128 ray tracing cores and 512 tensor cores. The GPU operates at a base clock of 2235 MHz and boosts to 2520 MHz, with 24 GB of GDDR6X memory on a 384-bit bus delivering 1.01 TB/s of bandwidth.

In synthetic benchmarks, the 4090 scores 38,194 in Passmark G3D and 31,7684 in Geekbench OpenCL, placing it in the 91st percentile of all GPUs. Its nearest rivals include the NVIDIA Tesla T4 (0.4% higher average score), Tesla P40 (0.5% lower), AMD Radeon Pro Vega 56 (0.9% higher), and Quadro P6000 (1.3% higher). These deltas are all within 1.5%, indicating that the 4090's raw compute performance is comparable to these professional-grade cards in general benchmarks.

However, in Rust, the GPU's role is secondary to the CPU at most settings. The evidence for this is the small FPS delta between Low and High at 1080p (24.8 FPS) compared to the same delta at 4K (21.9 FPS). The GPU starts to matter more at 4K Ultra, where the 53.5 FPS result is 45.0% lower than 1080p Ultra's 97.4 FPS — the steepest resolution scaling in the dataset.

The 4090's 24 GB of VRAM is more than sufficient for Rust at any resolution, even with the game's large texture sets and long draw distances. The 1.01 TB/s memory bandwidth ensures that texture streaming is not a bottleneck. The data suggests that the GPU's performance ceiling is far above what this CPU can feed, and only at 4K Ultra does the 4090 begin to approach its limits. For users considering this pairing, the GPU is clearly not the limiting factor in Rust — the 2018-era CPU is.