A true test for system memory. Procedural maps can exhaust RAM quickly; 16GB is the minimum, and 32GB is recommended. CPUs with 3D V-Cache (AMD X3D) offer massive performance gains here.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, all quality settings exceed 158 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 143 FPS. At 4K, all settings exceed 104 FPS.
The GeForce RTX 4090 is 244% above the recommended GPU (GeForce GTX 980) for Rust. The Core i9-13900KS is 394% above the recommended CPU (Core i7-4790K).
Rust supports: AFMF. This game does not have native DLSS 3 or FSR 3 Frame Generation support. AFMF is AMD-exclusive and not compatible with GeForce RTX 4090.
The GeForce RTX 4090 sets the FPS ceiling at 4k (low/high), while the Core i9-13900KS still has additional frame-generation headroom. The FPS ceiling is closely matched at all 1080p settings, all 1440p settings, 4k (medium/ultra).
Approximated average price on current market:
Combo price: $2229. At 1080p Ultra, this combo delivers 158 FPS, equivalent to 0.07 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.122 fps/$ | 0.101 fps/$ | 0.082 fps/$ | 0.071 fps/$ |
| 1440p | 0.117 fps/$ | 0.099 fps/$ | 0.074 fps/$ | 0.064 fps/$ |
| 4k | 0.079 fps/$ | 0.069 fps/$ | 0.057 fps/$ | 0.047 fps/$ |
* Table values represent FPS per Dollar (higher is better)
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 4k low, the GeForce RTX 4090 sets the ceiling at about 162 FPS, while the Core i9-13900KS has headroom up to 175 FPS. In this scenario, the GPU limits the CPU potential by 7% (FPS gap: 13 FPS). Overall distribution: GPU limits 2/12 cells, CPU limits 0/12, balanced 10/12. Confidence is low because both ceilings are very close in this cell.
The Core i9-13900KS and GeForce RTX 4090 stay close in effective frame-generation ceiling across most presets, so neither side consistently suppresses the other by a large margin.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | Balanced | Balanced | Balanced | Balanced |
| 1440p (2K QHD) | Balanced | Balanced | Balanced | Balanced |
| 4K (Ultra HD) | GPU Limits CPU 7% | Balanced | GPU Limits CPU 7% | Balanced |
We estimate the maximum FPS the processor can sustain and the maximum FPS the graphics card can sustain in each setting, then compare those limits directly.
Limit Factor formula: (stronger - weaker) / stronger. Example: if CPU ceiling is 200 FPS and GPU ceiling is 140 FPS, then GPU limits CPU by 30%.
CPU Limits GPU means the processor ceiling is lower. GPU Limits CPU means the graphics ceiling is lower. Balanced means the FPS ceilings are close enough that the gap is negligible.
A component can still be the FPS limiter without reaching 100% utilization. The displayed percentages are derived from FPS ceilings, not generic utilization heuristics.
See how your processor and graphics card compare against the game official minimum and recommended system specs. The placement of your hardware is calculated using relative synthetic performance scores to help you gauge overall playability.
Your CPU is 394% above and your GPU is 244% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+394%vsrecommended
+244%vsrecommended
+494%vsminimum
+589%vsminimum
Yes, the Core i9-13900KS paired with the GeForce RTX 4090 can run Rust smoothly up to 4k achieving around 104 FPS at Ultra quality. Your GPU is 244% above the recommended specs, and your CPU is 394% above the recommended requirements.
This CPU + GPU combo costs approximately $2229 ($580 CPU (Rank #172 Value) + $1649 GPU (Rank #77 Value)). Your GeForce RTX 4090 provides phenomenal top-tier performance but at a premium enthusiast price. Since you are essentially at the ceiling of current hardware capabilities, there are no meaningful performance upgrades available. However, if you wanted a more cost-effective build that still delivers a great experience, you could theoretically step down to a high-end card with a significantly better value rating.
Your GeForce RTX 4090 is already a top-tier graphics card. While it's technically the limiting factor here (which means you are fully utilizing your GPU's visual horsepower exactly as intended), there is no meaningful upgrade path that would drastically improve your Rust performance right now. GPU fully utilized at: 4k high, 4k low.
Rust currently only supports AFMF (AMD Fluid Motion Frames) for frame generation, which is an AMD-exclusive technology. Because you are using an NVIDIA GPU, you cannot use Frame Generation for this specific game. However, the game does support DLSS Upscaling and FSR Upscaling, which you should enable to render at a lower resolution and use AI to significantly boost your FPS without losing visual quality.
Rust requires at minimum a Core i7-3770 (CPU) and GeForce GTX 670 (GPU) with 10 GB RAM and 25 GB (SSD) storage. For the recommended experience, you need a Core i7-4790K and GeForce GTX 980 with 16 GB RAM. Your Core i9-13900KS and GeForce RTX 4090 both exceed the recommended specs, so you're well-positioned for a great experience.
These Rust FPS results are not arbitrary numbers. They come from calculations informed by thousands of real gaming benchmarks, and the typical accuracy range is around 10% to 15%. That makes them far more useful than generic FPS calculators that simply invent values without a benchmark foundation. Actual in-game performance can still vary with drivers, updates, RAM configuration, cooling, and the exact scene being rendered.
Performance estimates are based on synthetic benchmarks and hardware capabilities.
Results may vary based on drivers, OS, and background processes.
