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 122 FPS. At 1440p, all settings exceed 101 FPS. At 4K, frame rates range from 45 to 86 FPS.
The GeForce RTX 4090 is 244% above the recommended GPU (GeForce GTX 980) for Rust. The Core i5-12400F is 59% above the recommended CPU (Core i7-4790K).
The Core i5-12400F determines the performance ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the GPU has headroom.
Approximated average price on current market:
Combo price: $1759. At 1080p Ultra, this combo delivers 122 FPS, equivalent to 0.07 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.106 fps/$ | 0.101 fps/$ | 0.084 fps/$ | 0.069 fps/$ |
| 1440p | 0.098 fps/$ | 0.088 fps/$ | 0.070 fps/$ | 0.057 fps/$ |
| 4k | 0.049 fps/$ | 0.042 fps/$ | 0.035 fps/$ | 0.026 fps/$ |
* Table values represent FPS per Dollar (higher is better)
At 4k ultra, the Core i5-12400F sets the ceiling at about 45 FPS, while the GeForce RTX 4090 could reach 85 FPS. In this scenario, the CPU limits the GPU potential by 47% (FPS gap: 40 FPS). Overall distribution: CPU limits 12/12 cells, GPU limits 0/12, balanced 0/12.
Your Core i5-12400F is the limiting side in the heaviest mismatch. This means part of the GeForce RTX 4090 rendering potential remains unused in those settings.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU Limits GPU 29% | CPU Limits GPU 25% | CPU Limits GPU 22% | CPU Limits GPU 26% |
| 1440p (2K QHD) | CPU Limits GPU 28% | CPU Limits GPU 28% | CPU Limits GPU 22% | CPU Limits GPU 21% |
| 4K (Ultra HD) | CPU Limits GPU 43% | CPU Limits GPU 46% | CPU Limits GPU 42% | CPU Limits GPU 47% |
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.
The displayed percentages are derived from FPS ceilings, not generic utilization heuristics.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU35% - 54% <> GPU62% - 77% <> | CPU38% - 54% <> GPU61% - 80% <> | CPU36% - 54% <> GPU77% - 91% <> | CPU30% - 51% <> GPU75% - 90% <> |
| 1440p (2K QHD) | CPU34% - 54% <> GPU63% - 77% <> | CPU37% - 54% <> GPU62% - 81% <> | CPU35% - 54% <> GPU79% - 91% <> | CPU28% - 51% <> GPU77% - 90% <> |
| 4K (Ultra HD) | CPU32% - 54% <> GPU81% - 83% <> | CPU34% - 54% <> GPU78% - 87% <> | CPU33% - 54% <> GPU96% - 99% <> | CPU26% - 51% <> GPU96% - 99% <> |
The Core i5-12400F + GeForce RTX 4090 pairing runs this title with CPU utilization between 26% and 54% and GPU utilization between 61% and 99%. Core i5-12400F keeps significant headroom across presets, while GeForce RTX 4090 becomes the primary limiter at high visual load. As resolution scales, average GPU load rises from 77% at 1080p to 90% at 4K, while CPU averages move from 44% to 42%.
This profile is GPU-bound. At 4K (Ultra HD) High, the GeForce RTX 4090 averages 98% usage (96-99%), while the Core i5-12400F stays at 44% (33-54%), indicating the graphics pipeline is the limiting stage.
At 1080p, averages sit around CPU 44% and GPU 77%. At 1440p, that shifts to CPU 44% and GPU 78%, and at 4K it reaches CPU 42% and GPU 90%. This shows that GPU demand scales sharply with resolution while CPU load remains comparatively stable.
1440p (2K QHD) High is the most balanced preset based on this dataset. It runs around CPU 44% (35-54%) and GPU 85% (79-91%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Core i5-12400F remains stable for consistent frame delivery.
Upgrade priority should be the GPU. The GeForce RTX 4090 reaches 98% average load at 4K (Ultra HD) High while the Core i5-12400F still has headroom, so a faster graphics card would deliver the largest uplift.
Understanding Hardware Utilization & Bottlenecks: These percentages represent how much of your component's maximum processing power is actively being used during gameplay. This is the key to identifying performance bottlenecks in any system.
Data generated by our Machine Learning engine trained on real-world benchmarks. Shows the approximate average utilization at each setting.
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 59% above and your GPU is 244% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+59%vsrecommended
+244%vsrecommended
+92%vsminimum
+589%vsminimum
Yes, the Core i5-12400F paired with the GeForce RTX 4090 can run Rust smoothly up to 1440p achieving around 101 FPS at Ultra quality. Your GPU is 244% above the recommended specs, and your CPU is 59% above the recommended requirements.
This CPU + GPU combo costs approximately $1759 ($110 CPU (Rank #30 Value) + $1649 GPU (Rank #77 Value)). Your build is already very cost-efficient, but if you want even more FPS, the next good option is upgrading the CPU. For example, the Ryzen 9 9950X is a great upgrade option for around $649 (Rank #5 for value).
For Rust, upgrading the CPU would have the biggest impact on performance. The Core i5-12400F is currently the limiting factor — the GeForce RTX 4090 has extra headroom that a faster processor could take advantage of. This is especially noticeable at 1080p where CPU performance matters more. CPU-limited at: 1080p low, 1080p medium, 1080p high, 1080p ultra, 1440p low, 1440p medium, 1440p high, 1440p ultra, 4k low, 4k medium, 4k high, 4k ultra.
Rust does not currently support Frame Generation technologies like DLSS 3 or FSR 3. Your performance is based entirely on native rendering. If the game adds support in a future update, newer GPUs will benefit the most.
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 i5-12400F 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.
