Fortnite

Fortnite with the Intel Core i5-11400F and NVIDIA GeForce RTX 4090 delivers a benchmark profile that is heavily dictated by the graphics preset, with the CPU proving to be a significant constraint at lower resolutions. The measured data shows a wide performance envelope, ranging from a highly playable 58 FPS at 4K Ultra to a blistering 357 FPS at 1080p Low, indicating that this combination is capable of adapting to a variety of competitive and visual priorities.

Settings Recommendations

Based on the measured FPS data, the optimal settings for this combination depend entirely on the user's primary display resolution and performance target. For 1080p gaming, the Medium preset offers the most balanced experience. The data shows an average of 313 FPS, which is only 44 FPS behind the Low preset's 357 FPS but delivers a substantial visual upgrade over Low. The Medium preset also provides the only measured FPS range at 1080p (266-360 FPS), indicating stable frame pacing that is ideal for high-refresh-rate competitive play.

At 1440p, the High preset emerges as the strongest recommendation. It achieves an average of 166 FPS, which is comfortably above the 144Hz refresh rate target for most high-end monitors. While the Low preset at this resolution hits 304 FPS, the High preset represents a more sensible trade-off, nearly tripling the visual fidelity of Low while still maintaining frame rates that exceed the capabilities of all but the most extreme displays. The Medium preset at 1440p, with an average of 214 FPS, is also viable, but High provides a better balance of image quality and speed.

For 4K gaming, the Medium preset is the clear winner. It produces an average of 113 FPS with a minimum of 96 FPS, ensuring a smooth experience on standard 60Hz displays and even on many 120Hz panels. While the Low preset at 4K achieves 160 FPS, the visual compromise is severe for a game like Fortnite. The High preset at 88 FPS and the Ultra preset at 58 FPS are too demanding for this resolution to maintain high refresh-rate fluidity. The data suggests that Medium at 4K is the sweet spot, providing a 55 FPS improvement over High while remaining playable and visually coherent.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, and its immense processing power is evident in the frame rates achieved at higher resolutions. Equipped with 24 GB of GDDR6X memory on a 384-bit bus, the GPU has a memory bandwidth of 1.01 TB/s, which is more than sufficient for Fortnite's asset streaming at any resolution. The 4090's architecture, with 16,384 shading units and 512 texture mapping units, allows it to brute-force its way through the game's rendering pipeline, as shown by the 172 FPS average at 1080p Ultra.

The GPU's clock behavior is critical to understanding the performance scaling. With a base clock of 2235 MHz and a boost clock of 2520 MHz, the 4090 maintains high sustained performance. However, the data indicates that at 1080p, the GPU is not the primary bottleneck. The fact that the average FPS drops from 357 at Low to 172 at Ultra—a 185 FPS swing—shows that the GPU is being fed more work as settings increase, but the CPU is limiting the absolute ceiling. At 4K, the GPU's role becomes more pronounced; the performance gap between Low (160 FPS) and Ultra (58 FPS) is a 102 FPS difference, demonstrating that the 4090 is now the primary driver of performance, with its raw compute power being the deciding factor.

The GPU's 128 RT cores and 512 tensor cores are present but not explicitly taxed by the measured settings, as the data does not differentiate between raster and ray-tracing workloads. The performance figures suggest that even with the most demanding rasterization settings, the 4090 has ample headroom, as evidenced by the 88 FPS at 4K High. The RTX 4090's percentile rank of 88 among all GPUs, coupled with an average benchmark score of 60,347, places it in the top tier of consumer hardware, and the measured Fortnite data confirms that it is a class-leading part for this title.

CPU Role

The Intel Core i5-11400F presents a clear performance ceiling in this configuration, particularly at lower resolutions where the GPU is not fully utilized. With 6 cores and 12 threads based on the Rocket Lake architecture, this CPU has a base clock of 2.60 GHz and a boost clock of 4.40 GHz. Its 12 MB of shared L3 cache is modest by modern standards, but the benchmark data shows it is sufficient to feed the RTX 4090 at higher resolutions. The CPU's 3DMark scores (5,652 in max threads) and Cinebench R23 multi-core score of 14,340 indicate solid mid-range performance, placing it in the 71st percentile of all CPUs.

The CPU's limiting effect is most visible in the 1080p Low preset, where the average FPS is 357. This is the highest score in the entire measured set, suggesting that the CPU is hitting its maximum frame generation capability in this scenario. As the resolution increases to 1440p and 4K, the CPU's load relative to the GPU decreases, allowing the GPU to become the bottleneck. For instance, at 1080p High, the average FPS is 261, while at 1440p High, it is 166. This 95 FPS drop is primarily due to the GPU's increased workload, not a CPU limitation. The data indicates that the i5-11400F is sufficient for 4K gaming with this GPU, as the 88 FPS at 4K High is a GPU-bound figure, but at 1080p, the CPU's single-thread performance (a 3DMark single-thread score of 868) prevents the system from exceeding roughly 360 FPS.

The CPU's memory bandwidth of 51.2 GB/s via dual-channel DDR4 is a potential constraint, but the measured FPS data does not show any anomalies that would suggest a memory bottleneck. The 65W TDP of the i5-11400F indicates that it is a power-efficient part, which is beneficial for system stability, but its 14nm process node is older than the GPU's 5nm node, contributing to its lower relative performance. The CPU's nearest rival, the AMD EPYC 7H12, has a deltaPct of 0.3% in average benchmark score, showing that the i5-11400F is competitive with a server-class chip in synthetic tests, but in gaming, the architecture's lower IPC is the limiting factor.

FAQ

Q: Can this combination achieve 240 FPS at 1080p?

A: Yes, at lower settings. The measured average FPS at 1080p Low is 357, and at 1080p Medium it is 313. Both exceed the 240 FPS target, ensuring a smooth experience on 240Hz monitors, provided the settings are kept at Medium or below.

Q: Is the RTX 4090 bottlenecked by the i5-11400F in Fortnite?

A: The data suggests yes, at 1080p. The 1080p Low preset achieves 357 FPS, which is likely a CPU limit, as the GPU is capable of much higher frame rates. At 1440p and 4K, the bottleneck shifts to the GPU, as evidenced by the significant FPS drop when increasing resolution at the same settings.

Q: What is the best resolution for this combo to maintain a stable 144 FPS?

A: At 1440p High, the average FPS is 166, which is above 144 FPS. At 4K Medium, the average is 113 FPS, which is below 144 FPS. Therefore, 1440p with High settings is the highest resolution that can consistently hit the 144 FPS target. For a solid 120 FPS experience, 4K Medium with its 113 FPS average is also viable.

Q: How does the Ultra preset compare to High in terms of performance cost?

A: The performance cost is substantial. At 1080p, Ultra averages 172 FPS, which is 89 FPS lower than High's 261 FPS. At 1440p, the gap is 56 FPS (110 vs 166). At 4K, Ultra drops to 58 FPS, which is 30 FPS lower than High's 88 FPS. The data indicates that the Ultra preset is not worth the performance penalty for this game.

Q: Is the 24 GB of VRAM on the RTX 4090 necessary for Fortnite?

A: The measured data does not indicate any VRAM limitations. The 24 GB capacity and 1.01 TB/s bandwidth are far in excess of what Fortnite requires at the tested settings, as the game's performance scales with compute and rendering load, not memory allocation. The GPU's memory subsystem is not a bottleneck in any of the measured rows.

Q: Does the CPU's 6-core, 12-thread configuration limit performance in Fortnite?

A: The data shows that at 1080p, the CPU is the primary limiter, but the 6-core configuration is not a problem per se. The CPU's single-thread performance is the key factor, as Fortnite is not heavily multi-threaded. The 3DMark single-thread score of 868 and the 357 FPS cap at 1080p Low suggest that the CPU's core speed, not its core count, is the limiting factor.

Resolution Scaling

The measured FPS data reveals a clear pattern of scaling as resolution increases, which highlights the shifting bottleneck between the CPU and GPU. At Low settings, the average FPS drops from 357 at 1080p to 304 at 1440p (a 53 FPS drop) and then to 160 at 4K (a 144 FPS drop from 1440p). This indicates that at Low settings, the CPU is heavily involved, and the GPU is not fully taxed until 4K. The 53 FPS drop from 1080p to 1440p is relatively small, suggesting the CPU is still the primary constraint at 1440p Low. The massive 144 FPS drop from 1440p to 4K signals that the GPU's pixel fill rate and shading throughput become the dominant factor.

At High settings, the scaling is more linear and GPU-bound. The FPS drops from 261 at 1080p to 166 at 1440p (a 95 FPS drop) and then to 88 at 4K (a 78 FPS drop). The consistent ~90 FPS drop per resolution step indicates that the GPU is the primary bottleneck at this setting, as the CPU has less relative work to do. The Medium preset shows a similar pattern, with averages of 313, 214, and 113 FPS at 1080p, 1440p, and 4K, respectively. The 4K Medium result of 113 FPS is notably higher than the 4K High result of 88 FPS, showing that the GPU's workload scales significantly with texture and shading complexity.

The most revealing data point is the 4K Ultra average of 58 FPS. This is the lowest score in the entire set, and it demonstrates that the RTX 4090, while powerful, is not immune to the demands of Fortnite's highest settings at 4K. The scaling from 4K High (88 FPS) to 4K Ultra (58 FPS) is a 30 FPS drop, which is a 34% reduction in performance for a single settings tier. This suggests that the Ultra preset includes costly effects that disproportionately impact the GPU. Overall, the scaling analysis shows that this combo is best suited for 1080p and 1440p gaming, where the CPU's limitations are less apparent, and 4K gaming is only viable at Medium or Low settings.

Measured FPS Breakdown

The measured FPS data provides a comprehensive view of performance across all combinations of resolution and settings. At 1920x1080, the Low preset yields an average of 357 FPS, making it the fastest configuration in the entire dataset. The Medium preset follows with an average of 313 FPS, and it is the only 1080p setting with a measured FPS range (266 to 360 FPS), indicating stable frame delivery. The High preset drops to an average of 261 FPS, while the Ultra preset brings the average down to 172 FPS. The spread between Low and Ultra at 1080p is 185 FPS, demonstrating the significant impact of settings on performance.

At 2560x1440, the performance scales down as expected. The Low preset averages 304 FPS, which is still exceptionally high for a 1440p resolution. The Medium preset achieves an average of 214 FPS with a range of 182 to 246 FPS, providing a smooth experience for high-refresh-rate 1440p monitors. The High preset averages 166 FPS, which is the recommended setting for this resolution due to its balance of quality and speed. The Ultra preset at 1440p averages 110 FPS, which is the first setting in the dataset to fall below the 144 FPS threshold, indicating that the GPU is starting to struggle with the combination of high resolution and maxed-out settings.

At 3840x2160, the performance becomes more GPU-bound, and the settings have a dramatic effect. The Low preset averages 160 FPS, which is surprisingly high for 4K and suggests the CPU is still contributing significantly. The Medium preset averages 113 FPS with a range of 96 to 130 FPS, which is the only 4K setting with a measured range, and it represents the best playable option at this resolution. The High preset drops to an average of 88 FPS, which is still playable but below the 120 FPS target. The Ultra preset at 4K averages just 58 FPS, which is the lowest score in the entire measured set and is only suitable for slower-paced gameplay or screenshots. The data shows a clear hierarchy: 1080p Medium (313 FPS) is the peak performance sweet spot, while 4K Ultra (58 FPS) is the most demanding configuration.

How This Combo Ranks

In the database of tested combinations, this pairing of the Intel Core i5-11400F and NVIDIA GeForce RTX 4090 holds a rank of 181 out of 3,700 total combos for Fortnite. This places it in the top 5% of all tested systems, which is an impressive feat given the CPU's mid-range positioning. The rank is a composite score that takes into account the measured FPS across all resolutions and settings, and it reflects the GPU's ability to compensate for the CPU's limitations at higher resolutions.

The CPU's performance relative to its peers is a key factor in this ranking. The i5-11400F has an average benchmark score of 17,177, which is nearly identical to its nearest rivals. For instance, the AMD EPYC 7H12 has a deltaPct of 0.3% (score 17,120), meaning the i5-11400F is essentially on par with a server-class CPU in synthetic tests. The Intel Core i5-12450H is a close competitor at -0.4% delta (score 17,239), showing that the i5-11400F is competitive with newer mobile parts. This synthetic parity does not translate to gaming, however, as the i5-11400F's desktop architecture provides more consistent performance under sustained load.

The GPU's ranking is also relevant. The RTX 4090 has an average benchmark score of 60,347 and sits in the 88th percentile of all GPUs. Its nearest rival, the Intel Arc Pro A60, has a deltaPct of 0%, indicating that the 4090's synthetic score is almost identical to that of a professional workstation GPU. This is misleading, as the 4090's gaming performance is far superior, but it highlights that the average benchmark score does not fully capture gaming potential. The combo rank of 181 out of 3,700 reflects the 4090's dominance in Fortnite, as it manages to push the overall system into the top tier despite the i5-11400F being a 71st percentile CPU. The data suggests that for Fortnite, the GPU is the single most important factor in achieving high frame rates, and this combo leverages that to great effect.