Rust

The AMD Ryzen 5 5500 paired with the NVIDIA GeForce RTX 5090 presents a striking imbalance in Rust, a survival title where the CPU often dictates the ceiling. The benchmark data shows a configuration where the GPU, which sits in the 94th percentile of all GPUs, is frequently held back by a processor that lands in the 79th percentile of all CPUs. This analysis examines how this pairing behaves across resolutions and settings, using the measured FPS data to isolate the limiting component.

Resolution Scaling

The FPS data reveals a classic pattern of CPU limitation at lower resolutions. At 1920x1080 with High settings, the system produces 143.6 FPS. Moving to 2560x1440 at the same settings, the frame rate actually increases to 125.4 FPS, which is a counter-intuitive result that indicates the CPU is the bottleneck at 1080p. When the resolution increases, the GPU takes on more work, but the CPU is already saturated; the result is that the frame rate does not scale down proportionally with the pixel count increase.

This is further confirmed when examining the Low settings preset. At 1920x1080 Low, the system achieves 179.6 FPS. At 2560x1440 Low, it drops to 159.4 FPS, a reduction of only 11.2%. However, when moving from 2560x1440 Low to 3840x2160 Low, the frame rate falls from 159.4 to 134 FPS, a 15.9% drop. The scaling behavior suggests that at 1080p, the Ryzen 5 5500's six cores are the primary constraint, and the RTX 5090 is not being fully utilized. The GPU's massive 32 GB memory buffer and 1.79 TB/s bandwidth are irrelevant when the CPU cannot feed the render pipeline fast enough.

The picture changes at 4K. At 3840x2160 with High settings, the average FPS is 78.3. This is a significant drop from the 125.4 FPS seen at 1440p, showing that the GPU is now becoming the limiting factor. The RTX 5090's 104.8 TFLOPS of FP32 compute is being taxed by the higher pixel count. The data indicates that the crossover point where the GPU becomes the primary bottleneck occurs somewhere between 1440p and 4K. At 1080p, the CPU holds the system back; at 4K, the GPU workload dominates. The spread between the Low and Ultra presets at 4K is also telling: 134 FPS on Low versus 57.4 FPS on Ultra shows that the GPU has headroom at lower settings, but the CPU still prevents it from reaching the frame rates seen at lower resolutions.

FAQ

Q: What is the maximum average FPS this configuration can achieve in Rust?

A: The highest measured average FPS is 179.6, achieved at 1920x1080 with Low settings. This is the peak performance point in the data set.

Q: How does the system perform at 4K Ultra settings?

A: At 3840x2160 with Ultra settings, the average FPS drops to 57.4. This is the lowest recorded frame rate and suggests that the RTX 5090 is being heavily utilized at this resolution and preset combination.

Q: Is the CPU or GPU the limiting factor at 1080p?

A: The data indicates the CPU is the primary limiter at 1920x1080. Evidence for this is that the frame rate at 1440p High (125.4 FPS) is not significantly lower than the 1080p High result (143.6 FPS), and at Low settings, the drop from 1080p to 1440p is only 11.2%, which is less than the pixel count increase would suggest.

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

A: At 2560x1440, the system runs at 159.4 FPS on Low settings and 100 FPS on Ultra settings. This represents a 59.4 FPS difference, showing a 37.3% reduction in frame rate when moving from the lowest to the highest settings preset.

Q: How does the Ryzen 5 5500 compare to its closest rivals in general benchmarks?

A: The Ryzen 5 5500 has an average benchmark score of 20875, which places it nearly identical to the Intel Core i5-12500 (20897, deltaPct -0.1%) and the AMD Ryzen 5 PRO 4655GE (20900, deltaPct -0.1%). It is slightly ahead of the AMD EPYC 7J13 (20845, deltaPct 0.1%).

Q: What is the frame rate difference between 1080p and 4K at Medium settings?

A: At Medium settings, the system achieves 151.9 FPS at 1920x1080 and 90.8 FPS at 3840x2160. This is a 61.1 FPS drop, which is a 40.2% reduction in performance when scaling up to 4K.

CPU Role

The AMD Ryzen 5 5500 is a six-core, twelve-thread processor based on the Zen 3 architecture. Its base clock is 3.60 GHz with a boost clock of 4.20 GHz. The benchmark data suggests this CPU is a significant factor in Rust's performance, particularly at lower resolutions. The processor's 16 MB of L3 cache and dual-channel DDR4 memory support (with a theoretical bandwidth of 51.2 GB/s) are relevant for a game like Rust, which has a complex world simulation.

The CPU's performance percentile (79th) relative to the GPU's (94th) indicates a mismatch. In CPU-bound scenarios, the 3dmark benchmarks show a single-thread score of 836 and a 2-thread score of 1645. Rust is known to be sensitive to single-thread performance, and a score of 836 in the 3dmark single-thread test provides a baseline for the CPU's capability. The Cinebench R23 multicore score of 16429 shows the processor's aggregate throughput, but the game's engine may not fully utilize all twelve threads.

The data shows that at 1080p, the frame rates across settings are compressed. The difference between Low (179.6 FPS) and Ultra (132.7 FPS) is 46.9 FPS. This relatively small spread suggests that even at Low settings, the CPU is preventing the frame rate from climbing higher. The fact that the 1440p High score (125.4 FPS) is close to the 1080p High score (143.6 FPS) reinforces the idea that the CPU is the bottleneck. If the GPU were the limiter, the frame rate would drop more steeply with increased resolution. The Ryzen 5 5500's 65W TDP and 7nm process node are characteristics that define its power profile, but the core count and clock speeds are what ultimately constrain Rust's simulation and draw call processing.

Measured FPS Breakdown

The measured FPS data provides a detailed look at the system's performance across three resolutions and four settings presets. At 1920x1080, the system delivers 179.6 FPS on Low, 151.9 FPS on Medium, 143.6 FPS on High, and 132.7 FPS on Ultra. The scaling from Low to Ultra is a 26.1% reduction in frame rate. This resolution shows the highest absolute frame rates, but the CPU limitation is evident in the relatively modest gains from lowering settings.

At 2560x1440, the average FPS figures are 159.4 (Low), 133.7 (Medium), 125.4 (High), and 100 (Ultra). The drop from Low to Ultra is 59.4 FPS, which is a 37.3% reduction. The performance at High settings (125.4 FPS) is only slightly lower than the 1080p High result (143.6 FPS), indicating that the CPU is still a major factor at this resolution. The system maintains over 100 FPS at all settings except Ultra, where it hits exactly 100 FPS.

At 3840x2160, the GPU begins to assert itself as the primary constraint. The system achieves 134 FPS on Low, 90.8 FPS on Medium, 78.3 FPS on High, and 57.4 FPS on Ultra. The difference between Low and Ultra is 76.6 FPS, a 57.2% reduction. This is a much steeper scaling curve than at 1080p, showing that the RTX 5090's workload is now the dominant factor. The 4K Low score of 134 FPS is still lower than the 1440p Low score of 159.4 FPS, confirming that the GPU is now the bottleneck.

The combination ranks 129th out of 1717 tested configurations for this game, which places it in the top 7.5% of all tested combos. This ranking confirms the RTX 5090's power, but the CPU pairing prevents the system from achieving higher frame rates in CPU-bound scenarios.

GPU Role

The NVIDIA GeForce RTX 5090 is a flagship GPU with 32 GB of GDDR7 memory on a 512-bit bus, providing a memory bandwidth of 1.79 TB/s. Its 21760 shading units and 176 ROPs are backed by a boost clock of 2407 MHz. The GPU's 104.8 TFLOPS of FP32 compute is a substantial resource, but the benchmark data shows that this power is not fully harnessed at lower resolutions due to the CPU bottleneck.

In GPU-bound scenarios at 4K, the RTX 5090's capabilities are more apparent. The difference between 4K Low (134 FPS) and 4K High (78.3 FPS) shows the GPU's ability to handle varying workloads. The 4K Ultra score of 57.4 FPS is the lowest in the data set, indicating that the GPU is working at its limits with this preset. The GPU's percentile ranking of 94th places it ahead of its nearest rivals in the database, including the NVIDIA GeForce RTX 5090 D (deltaPct 0.1%) and the AMD Radeon PRO W6600 (deltaPct 1.3%).

The RTX 5090's 32 GB VRAM is more than sufficient for Rust at any resolution, meaning that memory capacity is not a limiting factor. The GPU's 1.79 TB/s bandwidth and 5 nm process node are features that contribute to its high benchmark scores, such as the 14411 in 3dmark Steel Nomad DX12 and 39650 in Passmark G3D. However, in this specific pairing, the GPU's performance is gated by the CPU at 1080p and 1440p. The data shows that the RTX 5090 requires a high-resolution, high-settings workload to reach its potential, and even then, the Ryzen 5 5500's limitations in single-threaded tasks may still create occasional frame hitches, though the average FPS figures remain playable. The GPU's 575W TDP and PCIe 5.0 x16 interface are specifications that enable its high performance, but the measured FPS data confirms that the system's overall performance in Rust is a product of the interaction between the CPU and GPU, with the CPU often holding the reins.