Fortnite

The AMD Ryzen 5 8400F paired with the NVIDIA GeForce RTX 4090 delivers a uniquely balanced Fortnite experience, though the data reveals distinct bottlenecks depending on the preset. At 1080p, the combination is exceptionally fast, pushing frame rates that exceed the refresh rate of most high-end monitors, while 4K Ultra stresses the GPU to its limits. This analysis breaks down the measured performance across twelve settings and resolution combinations, focusing on where the hardware excels and where it falls short.

Settings Recommendations

The measured data shows a clear hierarchy across the four presets, with the most significant performance trade-offs occurring at 4K. For competitive play, the Low preset is the standout choice, delivering 445.1 FPS at 1080p and 303.9 FPS at 1440p. These figures are more than double the High preset’s output at the same resolutions, offering a massive responsiveness advantage. At 4K, Low still produces 159.4 FPS, which is comfortably above the 144Hz threshold for most high-refresh displays.

For players prioritizing visual fidelity without sacrificing playability, the Medium preset represents the optimal balance. It achieves 339.5 FPS at 1080p, 216.4 FPS at 1440p, and 112.5 FPS at 4K. The drop from Low to Medium is roughly 24% at 1080p, but the visual improvements are substantial. The High preset is viable for those with 144Hz monitors at 1440p, where it hits 164.4 FPS, but at 4K it falls to 88.7 FPS, which may feel less fluid for fast-paced action.

The Ultra preset is the most demanding, yielding 170.3 FPS at 1080p, 106.9 FPS at 1440p, and only 58.8 FPS at 4K. The gap between Ultra and High is stark: a 35% reduction in frame rate at 1080p and a 34% reduction at 4K. Given that High already provides strong visual quality, Ultra’s additional overhead is difficult to justify except for players with 60Hz displays at 4K who prioritize maximum eye candy. For the best experience per the measured rows, Medium at 1440p offers the highest frame rate with acceptable visual compromise, while Low at 1080p is the definitive choice for esports-level responsiveness.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, and its capabilities are well documented by the benchmark results. The GPU’s 24 GB of GDDR6X memory on a 384-bit bus provides 1.01 TB/s of bandwidth, which is more than sufficient for Fortnite’s texture streaming and draw calls at any resolution. The card’s 82.58 TFLOPS of FP32 compute and 1,290.2 GTexel/s texture rate ensure that it never becomes a limiting factor until the resolution and settings are pushed to their extremes.

The GPU’s boost clock of 2520 MHz, up from a 2235 MHz base, allows it to scale performance dynamically. In the measured data, the RTX 4090 shows its strength at 1080p, where even the Ultra preset achieves 170.3 FPS. The real test comes at 4K, where the card’s raw throughput is taxed. The transition from 1440p to 4K on the High preset results in a 46% FPS drop (from 164.4 to 88.7), indicating that the GPU is the primary bottleneck at this resolution. The Ultra preset at 4K, with 58.8 FPS, is the only configuration where the RTX 4090 fails to maintain a high-refresh experience.

The GPU’s percentile ranking of 91 against all GPUs, with an average benchmark score of 66473, places it in the top tier. Its nearest rivals, such as the NVIDIA Tesla T4 (avg score 66733, deltaPct -0.4) and AMD Radeon Pro Vega 56 (avg score 67097, deltaPct -0.9), are within a 1% margin, but these are workstation-oriented cards. In gaming workloads, the RTX 4090’s advantage is more pronounced, as evidenced by its ability to push Fortnite past 400 FPS at 1080p Low. The data suggests that the GPU’s 24 GB frame buffer is never a limiting factor, as even the most demanding preset at 4K does not show signs of memory-related stuttering.

CPU Role

The AMD Ryzen 5 8400F is a 6-core, 12-thread processor based on the Zen 4 (Phoenix) architecture, with a base clock of 4.20 GHz and a boost clock of 4.70 GHz. Its benchmark scores are respectable: a Cinebench R23 multi-core score of 20851 and a single-core score of 2943, with a 3DMark max-threads score of 6165. The CPU’s percentile ranking of 82 against all CPUs, with an average benchmark score of 25064, places it in the upper-middle tier, slightly ahead of the AMD Ryzen 7 2700X (avg score 25057, deltaPct 0) and the AMD Ryzen 5 7500F (avg score 24993, deltaPct 0.3).

In Fortnite, the CPU’s role is most evident at lower resolutions and settings, where the GPU has headroom. At 1080p Low, the system achieves 445.1 FPS, which is a remarkable figure that hinges on the CPU’s ability to feed the GPU with draw calls. The 16 MB of shared L3 cache and dual-channel DDR5 memory bandwidth of 83.2 GB/s provide adequate data throughput for the game’s physics and building mechanics. The CPU’s 12 threads allow it to handle the game’s multi-threaded rendering tasks, though the single-core performance (Cinebench R23 single-core score of 2943) is critical for Fortnite’s primary game thread.

The data shows that the CPU is not the bottleneck until frame rates exceed roughly 300 FPS. At 1080p Medium (339.5 FPS) and 1440p Low (303.9 FPS), the CPU is still keeping pace, but the scaling from these points suggests diminishing returns. The transition from 1080p Low to 1080p Medium results in a 24% FPS drop, which is primarily a GPU workload increase, but the CPU is still able to maintain high frame delivery. The CPU’s 65W TDP and 4 nm process node indicate efficient operation, allowing sustained boost clocks without thermal throttling in most chassis configurations.

FAQ

Q: What is the highest average FPS achievable with this hardware in Fortnite?

A: The highest measured average FPS is 445.1, achieved at 1920x1080 with the Low preset. This is followed by 339.5 FPS at 1080p Medium and 303.9 FPS at 1440p Low.

Q: Does the RTX 4090’s 24 GB VRAM make a difference in Fortnite?

A: The 24 GB of GDDR6X memory provides 1.01 TB/s of bandwidth, which is more than adequate for Fortnite. The measured data shows no performance degradation due to VRAM capacity, even at 4K Ultra, indicating that the memory allocation is not a limiting factor.

Q: How does the Ryzen 5 8400F compare to its nearest rival, the Ryzen 7 2700X?

A: The Ryzen 5 8400F has an average benchmark score of 25064, which is nearly identical to the Ryzen 7 2700X’s 25057, a deltaPct of 0. This means the two CPUs perform at parity in synthetic benchmarks, despite the 8400F having fewer cores and threads.

Q: Is the 4K Ultra preset playable with this combination?

A: The 4K Ultra preset yields an average of 58.8 FPS, which is playable on a 60Hz display but not on high-refresh monitors. The frame rate is 34% lower than the 4K High preset’s 88.7 FPS, indicating a significant GPU workload increase.

Q: What is the frame rate drop from 1080p to 4K on the High preset?

A: On the High preset, the average FPS drops from 262.3 at 1080p to 164.4 at 1440p and then to 88.7 at 4K. This represents a 66% reduction from 1080p to 4K, highlighting the GPU’s increasing load at higher resolutions.

Q: Which settings provide the best performance for competitive play?

A: The Low preset at 1080p provides the highest frame rate at 445.1 FPS, which is ideal for competitive play. At 1440p, the Low preset still delivers 303.9 FPS, making it a viable option for players who prefer higher resolution with minimal FPS loss.

Resolution Scaling

The measured data reveals a consistent pattern of FPS scaling across resolutions, with the GPU becoming the dominant bottleneck as resolution increases. At 1080p, the system is clearly CPU-limited in the Low preset, achieving 445.1 FPS. The transition to 1440p Low results in a 32% drop to 303.9 FPS, which is a significant reduction that indicates the GPU is now being tasked more heavily. At 4K Low, the FPS drops further to 159.4, a 64% reduction from 1080p, confirming that the RTX 4090 is the limiting factor at this resolution.

The scaling is more pronounced on higher presets. On the High preset, the FPS drops from 262.3 at 1080p to 164.4 at 1440p (a 37% reduction) and then to 88.7 at 4K (a further 46% reduction from 1440p). This steep decline from 1440p to 4K (a total 66% drop from 1080p) is a classic sign of a GPU-bound scenario, where the 4K pixel count (8.3 million) overwhelms the card’s fill rate and shader throughput. The RTX 4090’s pixel rate of 443.5 GPixel/s is substantial, but the demands of 4K Ultra (58.8 FPS) push the card to its limits.

The scaling data also indicates that the CPU’s influence diminishes as resolution increases. At 1080p, the difference between Low and Ultra is 275 FPS (445.1 vs 170.3), which is a 62% spread. At 4K, the same comparison yields a 100.6 FPS difference (159.4 vs 58.8), a 63% spread. The relative spread remains consistent, but the absolute numbers show that the GPU is the primary driver of performance at 4K, while the CPU’s single-threaded performance (3DMark single-thread score of 951) is more critical at 1080p. The data suggests that players targeting 240Hz or higher should stick to 1080p with Low or Medium settings, while 1440p with High settings (164.4 FPS) provides a good balance for 144Hz displays. The 4K experience is best reserved for High settings or lower, as the Ultra preset’s 58.8 FPS is below the smoothness threshold for most gamers.