Fortnite serves as a showcase for Unreal Engine 5. In 'Performance Mode', it runs on almost anything. However, enabling 'Lumen' (global illumination) and 'Nanite' (virtualized geometry) requires a powerful RTX 30/40 series GPU to maintain 60 FPS. The building mechanics also add a significant CPU load, especially in competitive end-games with dense player structures.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, all quality settings exceed 261 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 212 FPS. At 4K, all settings exceed 122 FPS.
The GeForce RTX 4090 is 136% above the recommended GPU (GeForce GTX 1080) for Fortnite. The Core i9-13900KS is 361% above the recommended CPU (Core i5-7300U).
Fortnite supports: DLSS Frame Gen, AFMF. The GeForce RTX 4090 can use DLSS Frame Gen, providing up to 2x-3x frame rate boost.
The GeForce RTX 4090 sets the FPS ceiling at 1080p (low/medium/high), while the Core i9-13900KS still has additional frame-generation headroom. The FPS ceiling is closely matched at 1080p ultra, all 1440p settings, all 4k settings.
Approximated average price on current market:
Combo price: $2229. At 1080p Ultra, this combo delivers 261 FPS, equivalent to 0.12 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.314 fps/$ | 0.246 fps/$ | 0.149 fps/$ | 0.117 fps/$ |
| 1440p | 0.205 fps/$ | 0.155 fps/$ | 0.124 fps/$ | 0.095 fps/$ |
| 4k | 0.109 fps/$ | 0.079 fps/$ | 0.073 fps/$ | 0.055 fps/$ |
* Table values represent FPS per Dollar (higher is better)
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 1080p medium, the GeForce RTX 4090 sets the ceiling at about 466 FPS, while the Core i9-13900KS has headroom up to 529 FPS. In this scenario, the GPU limits the CPU potential by 12% (FPS gap: 63 FPS). Overall distribution: GPU limits 3/12 cells, CPU limits 0/12, balanced 9/12.
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) | GPU Limits CPU 8% | GPU Limits CPU 12% | GPU Limits CPU 11% | Balanced |
| 1440p (2K QHD) | Balanced | Balanced | Balanced | Balanced |
| 4K (Ultra HD) | Balanced | Balanced | Balanced | 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 361% above and your GPU is 136% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+361%vsrecommended
+136%vsrecommended
+845%vsminimum
+521%vsminimum
Yes, the Core i9-13900KS paired with the GeForce RTX 4090 can run Fortnite smoothly up to 4k achieving around 122 FPS at Ultra quality. Your GPU is 136% above the recommended specs, and your CPU is 361% 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 Fortnite performance right now. GPU fully utilized at: 1080p high, 1080p low, 1080p medium.
Yes! Fortnite supports DLSS Frame Gen and AFMF, and your GeForce RTX 4090 is compatible with DLSS Frame Gen. With Frame Generation enabled, you can expect a 2x-3x FPS multiplier on top of native framerates, significantly boosting perceived smoothness.
Fortnite requires at minimum a Core i3-3225 (CPU) and GeForce GTX 960 (GPU) with 8 GB RAM and 30 GB storage. For the recommended experience, you need a Core i5-7300U and GeForce GTX 1080 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 Fortnite 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.
