Doom

The AMD Ryzen 5 8400F is a 6-core, 12-thread processor based on the Zen 4 architecture, with a base clock of 4.20 GHz and a boost clock of 4.70 GHz. In the context of Doom, a 2016 FPS title known for its fast-paced action, the CPU's threading capabilities and clock speeds are more than sufficient to keep up with the game's rendering demands. The processor's benchmark scores, such as a Cinebench R23 multi-core score of 20851 and a single-core score of 2943, indicate strong per-thread performance, which is critical for maintaining high frame rates in a game that primarily relies on a few heavily loaded threads. The 8400F also shows a decent balance in synthetic tests, with a 3DMark max-threads score of 6165 and a single-thread score of 951, suggesting that while it has headroom for multi-threaded workloads, its single-thread speed is the key factor for Doom's performance. The CPU's 16 MB of shared L3 cache and dual-channel DDR5 memory support with 83.2 GB/s bandwidth provide adequate data throughput for the game's assets, ensuring that the CPU does not become a bottleneck at lower resolutions where frame rates are highest.

How This Combo Ranks

The combination of the AMD Ryzen 5 8400F and NVIDIA GeForce RTX 3080 is ranked 518 out of 1681 tested combinations in Doom. This places it in the upper third of all tested systems, indicating a strong overall performance profile. The CPU itself sits in the 82nd percentile against all CPUs, while the GPU is in the 80th percentile against all GPUs. When compared to its nearest rivals, the Ryzen 5 8400F's average benchmark score of 25064 is nearly identical to the AMD Ryzen 7 2700X's 25057, with a delta of 0 percent. It is also a hair ahead of the AMD Ryzen 5 7500F, which scores 24993, a delta of 0.3 percent. On the GPU side, the RTX 3080's average score of 35787 is slightly below the AMD Radeon RX 7900 GRE, which scores 36101, representing a -0.9 percent delta. This ranking suggests that while the individual components are well-matched, they are not at the extreme top end of the performance spectrum, leaving room for higher-tier configurations to outperform this setup.

GPU Role

The NVIDIA GeForce RTX 3080 is the primary driver of visual performance in this configuration. It features 10 GB of GDDR6X memory on a 320-bit bus, providing a bandwidth of 760.3 GB/s. The GPU's base clock is 1440 MHz, with a boost clock of 1710 MHz, and its memory runs at an effective speed of 19 Gbps. With 8704 shading units and 68 RT cores, the RTX 3080 is a high-end Ampere architecture card that excels in both rasterization and ray tracing workloads. In Doom, the GPU's role becomes increasingly important as resolution and settings are raised. The data shows a clear scaling pattern where the GPU's raw compute power, measured at 29.77 TFLOPS FP32, dictates performance at higher fidelity levels. The card's 10 GB VRAM is sufficient for Doom at all tested settings, even at 4K, where it must manage larger textures and more complex geometry without exceeding memory capacity, ensuring consistent frame delivery.

Resolution Scaling

The measured frame rates reveal how the balance between CPU and GPU load shifts across resolutions. At 1920x1080, the system is heavily CPU-bound, as evidenced by the high frame rates; at Low settings, the average FPS is 298.6, which is so high that the CPU's single-thread performance becomes the limiting factor. Moving to 2560x1440, the load on the GPU increases, and frame rates drop accordingly; at Low settings, the average FPS falls to 195.5, a reduction of about 34 percent from the 1080p result. At 3840x2160, the GPU is fully saturated, and the frame rates drop further; at Low settings, the average FPS is 107.4, which is roughly 64 percent lower than the 1080p Low result. This scaling pattern indicates that while the CPU is capable of pushing high frame rates at lower resolutions, the RTX 3080's performance dictates the results at higher resolutions. The gap between 1080p and 4K at Low settings is 191.2 FPS, showing that the GPU is the dominant component when resolution increases, while the CPU's influence wanes.

Measured FPS Breakdown

At 1920x1080, the system delivers exceptional performance across all settings. The Low preset achieves an average of 298.6 FPS, which is the highest recorded in the dataset. The Medium preset follows with 259.5 FPS, and the High preset produces 223.5 FPS. The Ultra preset, which demands the most from the hardware, still manages an average of 180.1 FPS. This shows that at 1080p, the combination of CPU and GPU is more than capable of driving high-refresh-rate monitors, even at the highest quality settings. Moving to 2560x1440, the performance remains strong but begins to show the GPU's increasing workload. The Low preset averages 195.5 FPS, the Medium preset averages 170.3 FPS, and the High preset averages 142.6 FPS. The Ultra preset at this resolution yields 116.3 FPS, which is still well above the 60 FPS threshold for smooth gameplay. At 3840x2160, the GPU is the clear limiting factor. The Low preset averages 107.4 FPS, which is the only 4K result above 100 FPS. The Medium preset drops to 94.6 FPS, the High preset falls to 79 FPS, and the Ultra preset bottoms out at 64.7 FPS. These numbers indicate that while 4K is playable, the higher settings push the RTX 3080 to its limits.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend heavily on the target resolution and desired frame rate. For 1920x1080, the Ultra preset is the clear choice, as it delivers an average of 180.1 FPS, which is more than enough for any high-refresh-rate display. The performance headroom at this resolution means that users can prioritize visual fidelity without sacrificing smoothness. At 2560x1440, the Ultra preset produces 116.3 FPS, which is still very playable, but the High preset at 142.6 FPS offers a better balance for those seeking higher frame rates on 144 Hz monitors. If maximizing frame rate is the priority, the Medium preset at 170.3 FPS is a viable option, though the visual difference between Medium and High may be noticeable. At 3840x2160, the Ultra preset averages 64.7 FPS, which is just above the 60 FPS threshold, but it may experience occasional dips in demanding scenes. The High preset at 79 FPS provides a more comfortable margin, ensuring a smoother experience. For the best overall experience at 4K, the Medium preset at 94.6 FPS is recommended, as it offers a significant frame rate boost over High and Ultra while maintaining a high level of visual quality. The Low preset at 107.4 FPS is the only 4K option that exceeds 100 FPS, but it comes at the cost of reduced graphical fidelity. Consequently, the data suggests that the High preset at 1440p is the sweet spot, delivering a high frame rate of 142.6 FPS with substantial visual quality, while the Medium preset at 4K is the most balanced choice for 4K displays.