Lockdown Protocol

# Lockdown Protocol with AMD Ryzen 5 8400F + NVIDIA GeForce RTX 5090

The AMD Ryzen 5 8400F paired with the NVIDIA GeForce RTX 5090 ranks 29th out of 1,637 tested combinations in Lockdown Protocol, placing it in the top 1.8% of all configs measured. This combo delivers exceptionally high frame rates across all tested resolutions, with the CPU's 82nd percentile standing among all processors and the GPU's 94th percentile among all graphics cards. The pairing exhibits a clear pattern: at 1080p, the system approaches the practical ceiling for high-refresh gaming, while at 4K Ultra, frame rates remain well above playable thresholds.

How This Combo Ranks

The combo's 29th position out of 1,637 tested configurations reflects a system that is heavily GPU-bound at higher resolutions but shows signs of CPU limitation at lower settings. The RTX 5090 sits in the 94th percentile of all GPUs, with an average benchmark score of 84,306, placing it just 0.1% ahead of the RTX 5090 D and 0.2% ahead of the RTX 5050 Mobile in synthetic tests. The Ryzen 5 8400F, meanwhile, holds the 82nd percentile among CPUs with an average score of 25,064, essentially matching the AMD Ryzen 7 2700X (0% delta) and trailing the AMD Ryzen AI 5 PRO 340 by just 0.1%.

In Lockdown Protocol specifically, the measured data shows this combination delivering 290.8 FPS at 1080p Low, which is 64.5% higher than the 176.7 FPS achieved at 1080p Ultra. This spread indicates that while the GPU is enormously powerful, the CPU's six cores and twelve threads (Zen 4 Phoenix architecture, 4 nm process) can become a limiting factor when frame rates climb toward 300 FPS. The CPU's Cinebench R23 multi-core score of 20,851 and single-core score of 2,943 suggest adequate headroom for most gaming scenarios, but the extreme frame rates possible with this GPU at low settings push against those limits.

Compared to its nearest CPU rivals, the 8400F's performance profile is notable. It matches the older Ryzen 7 2700X in average score (25,057 vs. 25,064, a 0% delta) despite having fewer cores, which speaks to the efficiency of the Zen 4 architecture. The 8400F also edges out the Ryzen 5 7500F by 0.3% (25,064 vs. 24,993), making it a marginally stronger pairing for this GPU.

FAQ

Q: How does this combo perform at 4K Ultra settings?

A: At 3840x2160 with Ultra settings, the system averages 86.6 FPS. This is comfortably above the 60 FPS threshold for smooth gameplay and represents a 51.2% drop from the 4K Low result of 180.4 FPS, indicating the GPU is the primary workload carrier at this resolution.

Q: Is the CPU or GPU the limiting factor in this configuration?

A: The data suggests the GPU becomes the bottleneck at higher resolutions, while the CPU shows signs of limitation at 1080p Low. The frame rate scaling from 1080p Low (290.8 FPS) to 1440p Low (263.5 FPS) to 4K Low (180.4 FPS) shows a 9.4% and 38.0% drop respectively, with the 4K drop being much larger due to GPU workload.

Q: How does the Ryzen 5 8400F compare to its nearest rivals?

A: The 8400F's average benchmark score of 25,064 is statistically tied with the AMD Ryzen 7 2700X (25,057, 0% delta) and the AMD Ryzen AI 5 PRO 340 (25,099, -0.1% delta). It is 0.3% ahead of the AMD Ryzen 5 7500F (24,993).

Q: What is the best settings preset for 1440p gaming?

A: At 2560x1440, High settings deliver 173.8 FPS, which is 42.6 FPS higher than Ultra (131.2 FPS) but only 27.5 FPS lower than Medium (201.3 FPS). High represents a strong balance, offering 32.4% more performance than Ultra while maintaining visual quality.

Q: Can this system handle 4K high-refresh monitors?

A: At 4K High, the combo produces 114.1 FPS, which exceeds the 100 Hz refresh rate common on many high-end displays. For 144 Hz 4K panels, dropping to Medium (126.4 FPS) provides a 10.8% improvement over High.

Q: How does frame rate scale between 1080p and 4K at Ultra settings?

A: The system delivers 176.7 FPS at 1080p Ultra, 131.2 FPS at 1440p Ultra (25.8% lower), and 86.6 FPS at 4K Ultra (51.0% lower than 1080p). This scaling pattern is characteristic of a GPU-bound scenario at Ultra settings.

Settings Recommendations

The measured data indicates that High settings provide the most balanced experience across all three resolutions. At 1920x1080, High delivers 234.4 FPS, which is 57.7 FPS higher than Ultra (176.7 FPS) but only 21.4 FPS lower than Medium (255.8 FPS). This makes High the optimal choice for competitive play on high-refresh 1080p monitors, as it retains most of the visual fidelity while providing a meaningful frame rate advantage over Ultra.

For 2560x1440, High settings at 173.8 FPS are particularly compelling. This represents a 32.4% improvement over Ultra (131.2 FPS) while sacrificing little in visual quality compared to Medium (201.3 FPS). The 42.6 FPS gap between High and Ultra is substantial, and for most players, the visual difference between High and Ultra will not justify the performance penalty.

At 3840x2160, the choice depends on the display's refresh rate. For 60 Hz displays, Ultra at 86.6 FPS is viable and offers the best image quality. For 120 Hz or higher displays, Medium at 126.4 FPS is the recommended starting point, as it provides a 45.9% improvement over Ultra. High at 114.1 FPS also clears the 100 FPS threshold and may be preferable for those who prioritize visual quality over the additional 12.3 FPS from Medium.

The Low presets across all resolutions (290.8 FPS at 1080p, 263.5 FPS at 1440p, 180.4 FPS at 4K) are best reserved for esports scenarios where maximum frame rates are paramount, as the visual compromise is significant.

Measured FPS Breakdown

At 1920x1080, the system produces its highest frame rates. Low settings yield 290.8 FPS, followed by Medium at 255.8 FPS, High at 234.4 FPS, and Ultra at 176.7 FPS. The gap between Low and Ultra is 114.1 FPS, representing a 64.5% performance difference. This large spread suggests that at 1080p, the CPU plays a more significant role in determining performance, as the GPU has ample headroom at this resolution.

The 2560x1440 results show a similar pattern but with slightly compressed margins. Low delivers 263.5 FPS, Medium 201.3 FPS, High 173.8 FPS, and Ultra 131.2 FPS. The difference between Low and Ultra is 132.3 FPS, or 100.8% relative to Ultra. Notably, the drop from 1080p Low to 1440p Low is only 27.3 FPS (9.4%), while the drop from 1080p Ultra to 1440p Ultra is 45.5 FPS (25.8%). This indicates that at lower settings, the CPU is still a significant factor at 1440p.

At 3840x2160, the GPU becomes the dominant constraint. Low produces 180.4 FPS, Medium 126.4 FPS, High 114.1 FPS, and Ultra 86.6 FPS. The scaling from Low to Ultra shows a 93.8 FPS reduction, or 51.9% of the Low value. The 4K Low result of 180.4 FPS is actually lower than the 1080p Ultra result of 176.7 FPS, demonstrating that the resolution increase has a more substantial impact than the settings change at this level.

Resolution Scaling

The transition from 1080p to 4K reveals important information about the system's balance. At Low settings, the frame rate drops from 290.8 FPS at 1080p to 263.5 FPS at 1440p (a 9.4% reduction) and then to 180.4 FPS at 4K (a 38.0% reduction from 1440p). The relatively modest drop between 1080p and 1440p at Low settings suggests the CPU is still contributing meaningfully at these resolutions, as a purely GPU-bound system would show more linear scaling with pixel count.

At Ultra settings, the scaling is more pronounced: 176.7 FPS at 1080p, 131.2 FPS at 1440p (25.8% lower), and 86.6 FPS at 4K (34.0% lower than 1440p). The nearly uniform percentage drops across resolutions at Ultra settings indicate that the GPU is the clear bottleneck here. The RTX 5090's 32 GB of GDDR7 memory on a 512-bit bus with 1.79 TB/s bandwidth provides ample memory bandwidth for 4K textures, yet the rendering workload at Ultra still drives the frame rate down to 86.6 FPS.

The data suggests that at 1080p and 1440p with lower settings, the Ryzen 5 8400F's six-core, twelve-thread configuration with a 4.70 GHz boost clock can keep up with the RTX 5090's massive rendering throughput. However, at 4K, the GPU's workload dominates, and the CPU's role diminishes. This is typical of high-end GPU pairings with mid-range CPUs, and the 8400F's performance in this context is respectable given its 65 W TDP and 4 nm manufacturing process.