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 151 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 116 FPS. At 4K, all settings exceed 63 FPS.
The GeForce RTX 4090 is 244% above the recommended GPU (GeForce GTX 980) for Rust. The Core i7-8086K is 15% above the recommended CPU (Core i7-4790K).
The Core i7-8086K sets the FPS ceiling at 1440p ultra, 4k (medium/high/ultra), while the GeForce RTX 4090 still has headroom. The FPS ceiling is closely matched at all 1080p settings, 1440p (low/medium/high), 4k low.
Approximated average price on current market:
Combo price: $1827. At 1080p Ultra, this combo delivers 151 FPS, equivalent to 0.08 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.129 fps/$ | 0.120 fps/$ | 0.096 fps/$ | 0.083 fps/$ |
| 1440p | 0.124 fps/$ | 0.114 fps/$ | 0.079 fps/$ | 0.063 fps/$ |
| 4k | 0.074 fps/$ | 0.065 fps/$ | 0.048 fps/$ | 0.034 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 ultra, the Core i7-8086K sets the ceiling at about 63 FPS, while the GeForce RTX 4090 could reach 84 FPS. In this scenario, the CPU limits the GPU potential by 25% (FPS gap: 21 FPS). Overall distribution: CPU limits 6/12 cells, GPU limits 0/12, balanced 6/12.
Your Core i7-8086K 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) | Balanced | Balanced | Balanced | CPU Limits GPU 6% |
| 1440p (2K QHD) | Balanced | Balanced | Balanced | CPU Limits GPU 6% |
| 4K (Ultra HD) | CPU Limits GPU 6% | CPU Limits GPU 10% | CPU Limits GPU 17% | CPU Limits GPU 25% |
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.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU32% - 55% <> GPU65% - 82% <> | CPU35% - 55% <> GPU63% - 81% <> | CPU33% - 56% <> GPU77% - 96% <> | CPU27% - 53% <> GPU76% - 95% <> |
| 1440p (2K QHD) | CPU31% - 55% <> GPU67% - 82% <> | CPU34% - 55% <> GPU64% - 81% <> | CPU33% - 56% <> GPU79% - 95% <> | CPU26% - 53% <> GPU78% - 95% <> |
| 4K (Ultra HD) | CPU30% - 55% <> GPU83% - 86% <> | CPU32% - 55% <> GPU80% - 86% <> | CPU31% - 56% <> GPU98% - 100% <> | CPU25% - 53% <> GPU98% - 100% <> |
The Core i7-8086K + GeForce RTX 4090 pairing runs this title with CPU utilization between 25% and 56% and GPU utilization between 63% and 100%. Core i7-8086K keeps significant headroom across presets, while GeForce RTX 4090 carries most of the graphics load at heavier visual settings. As resolution scales, average GPU load rises from 80% at 1080p to 91% at 4K, while CPU averages move from 43% to 42%.
From a utilization perspective, this is a GPU-heavy load profile. At 4K (Ultra HD) High, the GeForce RTX 4090 averages 99% usage (98-100%), while the Core i7-8086K stays at 44% (31-56%). This shows the graphics pipeline is carrying most of the workload, but utilization alone does not define the FPS limiter.
At 1080p, averages sit around CPU 43% and GPU 80%. At 1440p, that shifts to CPU 43% and GPU 80%, and at 4K it reaches CPU 42% and GPU 91%. 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% (33-56%) and GPU 87% (79-95%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Core i7-8086K remains stable for consistent frame delivery.
Upgrade priority should be the GPU. The GeForce RTX 4090 reaches 99% average load at 4K (Ultra HD) High while the Core i7-8086K still has headroom, so a faster graphics card would deliver the largest uplift.
Understanding Hardware Utilization: These percentages represent how much of your component's maximum processing power is actively being used during gameplay. They describe hardware load, but they do not directly tell you which component sets the FPS ceiling.
Important: a CPU or GPU can still be the FPS limiter without reaching 100% utilization. Two processors can both show 40% usage and still deliver very different frame rates, depending on per-core speed, cache, engine threading, driver overhead, and frame preparation efficiency.
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 15% above and your GPU is 244% above the recommended specs. High/Ultra at 1080p. Lower settings for higher resolutions.
+15%vsrecommended
+244%vsrecommended
+38%vsminimum
+589%vsminimum
Yes, the Core i7-8086K paired with the GeForce RTX 4090 can run Rust smoothly up to 4k achieving around 63 FPS at Ultra quality. Your GPU is 244% above the recommended specs, and your CPU is 15% above the recommended requirements.
This CPU + GPU combo costs approximately $1827 ($178 CPU (Rank #250 Value) + $1649 GPU (Rank #77 Value)). Since the CPU is the main limiting factor, investing in a stronger processor will improve your framerates and overall value. 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 i7-8086K 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: 1440p ultra, 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 i7-8086K 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.
