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 96 FPS. At 1440p, all settings exceed 74 FPS. At 4K, frame rates range from 48 to 97 FPS.
The GeForce RTX 4090 is 136% above the recommended GPU (GeForce GTX 1080) for Fortnite. The Xeon E3-1245 v6 is 34% below recommended, but 36% above minimum.
The Xeon E3-1245 v6 sets the FPS ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the GeForce RTX 4090 still has headroom.
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 1080p low, the Xeon E3-1245 v6 sets the ceiling at about 202 FPS, while the GeForce RTX 4090 could reach 556 FPS. In this scenario, the CPU limits the GPU potential by 64% (FPS gap: 354 FPS). Overall distribution: CPU limits 12/12 cells, GPU limits 0/12, balanced 0/12.
Your Xeon E3-1245 v6 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 64% | CPU Limits GPU 54% | CPU Limits GPU 48% | CPU Limits GPU 50% |
| 1440p (2K QHD) | CPU Limits GPU 57% | CPU Limits GPU 44% | CPU Limits GPU 48% | CPU Limits GPU 51% |
| 4K (Ultra HD) | CPU Limits GPU 50% | CPU Limits GPU 32% | CPU Limits GPU 42% | CPU Limits GPU 41% |
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) | CPU52% - 90% <> GPU26% - 43% <> | CPU52% - 85% <> GPU72% - 77% <> | CPU32% - 59% <> GPU77% - 93% <> | CPU27% - 58% <> GPU77% - 93% <> |
| 1440p (2K QHD) | CPU51% - 86% <> GPU37% - 54% <> | CPU49% - 81% <> GPU73% - 94% <> | CPU30% - 58% <> GPU93% - 96% <> | CPU26% - 56% <> GPU91% - 96% <> |
| 4K (Ultra HD) | CPU53% - 85% <> GPU38% - 54% <> | CPU51% - 81% <> GPU73% - 95% <> | CPU33% - 56% <> GPU95% - 96% <> | CPU29% - 56% <> GPU94% - 96% <> |
The Xeon E3-1245 v6 + GeForce RTX 4090 pairing runs this title with CPU utilization between 26% and 90% and GPU utilization between 26% and 96%. Xeon E3-1245 v6 stays in a controlled operating range, while GeForce RTX 4090 carries most of the graphics load at heavier visual settings. As resolution scales, average GPU load rises from 70% at 1080p to 80% at 4K, while CPU averages move from 57% to 55%.
From a utilization perspective, this is a GPU-heavy load profile. At 4K (Ultra HD) High, the GeForce RTX 4090 averages 96% usage (95-96%), while the Xeon E3-1245 v6 stays at 44% (33-56%). 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 57% and GPU 70%. At 1440p, that shifts to CPU 55% and GPU 80%, and at 4K it reaches CPU 55% and GPU 80%. This shows that GPU demand scales sharply with resolution while CPU load remains comparatively stable.
1080p (Full HD) High is the most balanced preset based on this dataset. It runs around CPU 46% (32-59%) and GPU 85% (77-93%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Xeon E3-1245 v6 remains stable for consistent frame delivery.
Current utilization does not show an urgent upgrade requirement for either component; the Xeon E3-1245 v6 and GeForce RTX 4090 remain reasonably matched for this title.
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 34% below recommended and your GPU is 136% below recommended, but both meet minimum specs. Playable at Low/Medium settings, 1080p or below.
-34%vsrecommended
+136%vsrecommended
+36%vsminimum
+521%vsminimum
Yes, the Xeon E3-1245 v6 paired with the GeForce RTX 4090 can run Fortnite smoothly up to 1440p achieving around 74 FPS at Ultra quality. Your GPU is 136% above the recommended specs, and your CPU is 34% below 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 Xeon E3-1245 v6 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.
Fortnite 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.
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 setup meets the minimum requirements but falls short of the recommended specs. You may need to lower some settings for smooth performance.
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.
