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 156 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 120 FPS. At 4K, all settings exceed 67 FPS.
The GeForce RTX 4090 is 136% above the recommended GPU (GeForce GTX 1080) for Fortnite. The Ryzen 9 PRO 5945 is 163% 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 Ryzen 9 PRO 5945 sets the FPS ceiling at 1080p (low/ultra), all 1440p settings, all 4k settings, while the GeForce RTX 4090 still has headroom. The FPS ceiling is closely matched at 1080p (medium/high).
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 4k low, the Ryzen 9 PRO 5945 sets the ceiling at about 136 FPS, while the GeForce RTX 4090 could reach 198 FPS. In this scenario, the CPU limits the GPU potential by 31% (FPS gap: 62 FPS). Overall distribution: CPU limits 10/12 cells, GPU limits 0/12, balanced 2/12.
Your Ryzen 9 PRO 5945 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 11% | Balanced | Balanced | CPU Limits GPU 16% |
| 1440p (2K QHD) | CPU Limits GPU 29% | CPU Limits GPU 20% | CPU Limits GPU 21% | CPU Limits GPU 19% |
| 4K (Ultra HD) | CPU Limits GPU 31% | CPU Limits GPU 23% | CPU Limits GPU 23% | CPU Limits GPU 17% |
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 163% above and your GPU is 136% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+163%vsrecommended
+136%vsrecommended
+439%vsminimum
+521%vsminimum
Yes, the Ryzen 9 PRO 5945 paired with the GeForce RTX 4090 can run Fortnite smoothly up to 4k achieving around 67 FPS at Ultra quality. Your GPU is 136% above the recommended specs, and your CPU is 163% above the recommended requirements.
Price data is not currently available for this combination. In general, look for setups where the CPU and GPU are balanced — this ensures you're not overspending on one component that the other can't keep up with.
For Fortnite, upgrading the CPU would have the biggest impact on performance. The Ryzen 9 PRO 5945 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 ultra, 1440p high, 1440p low, 1440p medium, 1440p ultra, 4k high, 4k low, 4k medium, 4k ultra.
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 Ryzen 9 PRO 5945 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.
