Doom

The AMD Ryzen 5 8400F paired with the AMD Radeon RX 7700 XT delivers a highly capable 1080p and 1440p experience in Doom, but the data indicates that the GPU becomes the primary limiting factor as resolution scales to 4K. The measured frame rates show a clear pattern of GPU-bound performance at higher resolutions, while the CPU's six Zen 4 cores provide ample headroom at lower settings.

Resolution Scaling

The frame rate progression from 1080p to 4K reveals a textbook GPU-bound scenario. At 1080p with Low settings, the combo produces 262.4 FPS, which drops to 171.9 FPS at 1440p (a 34.5% reduction) and further to 93.9 FPS at 4K (a 64.2% reduction from 1080p). This steep decline as pixel count increases indicates that the RX 7700 XT's rendering throughput, not the CPU's processing capability, is the constraining factor.

The scaling pattern holds across all settings presets. With High settings, the transition from 1080p (195.2 FPS) to 1440p (123 FPS) represents a 37% drop, while moving to 4K (66 FPS) cuts performance by 66% relative to 1080p. The Medium preset shows similar behavior: 230.7 FPS at 1080p, 147.1 FPS at 1440p, and 79 FPS at 4K. This consistent ~35-40% reduction between each resolution step confirms that the workload scales almost entirely with pixel throughput.

The Ultra preset displays the most dramatic scaling penalty. At 1080p, the combo manages 157.6 FPS, but 1440p drops to 103.2 FPS, and 4K collapses to 53.7 FPS. The 4K result sits just above the 50 FPS threshold, suggesting that Ultra settings at 4K push the GPU to its practical limit for smooth gameplay. The data suggests that players targeting 4K should expect to use Medium or Low settings to maintain frame rates above 79 FPS.

CPU Role

The Ryzen 5 8400F provides a solid foundation for Doom's engine, with 6 cores and 12 threads operating at a base clock of 4.20 GHz and a boost clock of 4.70 GHz. The Zen 4 architecture, built on TSMC's 4 nm process, delivers strong single-thread performance as evidenced by its Cinebench R23 single-core score of 2943. This single-thread capability is crucial for game logic and draw call processing.

The CPU's benchmark data shows it performs competitively with its nearest rivals. The 8400F's average benchmark score of 25064 places it within 0.3% of the AMD Ryzen 5 7500F (24993) and essentially tied with the AMD Ryzen 7 2700X (25057). This parity in synthetic tests translates to consistent frame delivery in Doom, where the CPU rarely becomes the bottleneck even at 1080p with Low settings producing 262.4 FPS.

Multi-threaded performance is equally robust, with Cinebench R23 multi-core scoring 20851 and 3DMark max-threads reaching 6165. The 16 MB shared L3 cache and 83.2 GB/s memory bandwidth provide sufficient data throughput for the game's streaming requirements. At 1080p, the gap between Low (262.4 FPS) and High (195.2 FPS) settings indicates that the CPU can feed the GPU effectively across all presets, but the 1080p results suggest the CPU is approaching its limit only at the very highest frame rates.

GPU Role

The Radeon RX 7700 XT is the dominant component in this pairing, and its 12 GB of GDDR6 memory on a 192-bit bus provides 432.0 GB/s of bandwidth. The GPU's architecture, RDNA 3.0 on TSMC's 5 nm process, delivers 35.17 TFLOPS of FP32 performance across 3456 shading units. The boost clock of 2544 MHz and game clock of 2171 MHz drive the pixel rate of 244.2 GPixel/s.

The GPU's benchmark standing shows it trades blows with the NVIDIA GeForce RTX 5060, with the RX 7700 XT scoring 30097 versus 30109 for the RTX 5060 (a 0% delta). The average benchmark score places the RX 7700 XT in the 73rd percentile of all GPUs, indicating strong mainstream performance. In Doom specifically, the GPU's VRAM capacity proves sufficient even at 4K Ultra, where the 12 GB buffer handles the game's textures without apparent capacity-related stutters.

The GPU's role as the primary limiter becomes evident when examining the 4K results. At 4K Ultra, the combo produces 53.7 FPS, which is only 34% of the 1080p Ultra score. This 66% performance drop aligns with the pixel count increase from 1080p to 4K (approximately 4x), but the non-linear relationship shows that other factors like memory bandwidth and fill rate also contribute. The GPU's texture rate of 549.5 GTexel/s and ROP count of 96 are adequate for 1080p and 1440p, but 4K Ultra demands more than the architecture can efficiently deliver.

FAQ

Q: Can this combo maintain 60 FPS at 4K?

A: Yes, but only with adjusted settings. At 4K High, the average FPS is 66, and at 4K Medium it is 79. However, 4K Ultra drops to 53.7 FPS, which falls below the 60 FPS target.

Q: What is the best resolution for maximum frame rates?

A: 1080p provides the highest frame rates across all settings. With Low settings, the combo achieves 262.4 FPS, while High settings still deliver 195.2 FPS at this resolution.

Q: How does the CPU compare to its closest rival?

A: The Ryzen 5 8400F scores 25064 on average, which is 0.3% higher than the AMD Ryzen 5 7500F (24993) and statistically tied with the AMD Ryzen 7 2700X (25057).

Q: Is the GPU's performance competitive with NVIDIA offerings?

A: The RX 7700 XT's average benchmark score of 30097 is essentially identical to the NVIDIA GeForce RTX 5060's 30109, showing near-parity in synthetic tests.

Q: What settings should be used for 1440p gaming?

A: The data shows 1440p High delivers 123 FPS, which is smooth for most displays. Even 1440p Ultra maintains 103.2 FPS, making it a viable option.

Q: Does the GPU bottleneck the CPU at any resolution?

A: Benchmark results indicate the GPU is the limiting factor at all resolutions. The CPU's strong single-thread score of 2943 in Cinebench R23 suggests it has headroom beyond the measured frame rates.

How This Combo Ranks

The combination of the Ryzen 5 8400F and RX 7700 XT ranks 748th out of 1681 tested combos in Doom, placing it in the 55th percentile of all configurations. This mid-pack ranking reflects the GPU's position as a mainstream 1440p performer rather than a high-end 4K solution. The rank is consistent with the measured frame rates, which show excellent 1080p performance but diminishing returns at 4K.

The combo's ranking relative to other tested configurations suggests that the RX 7700 XT's 73rd percentile GPU score is offset by the CPU's 82nd percentile standing, resulting in a system that performs better than its individual component rankings might suggest. The 748th rank indicates that many higher-end combos with more powerful GPUs or newer CPUs achieve higher frame rates, particularly at 4K where the GPU's limitations are most pronounced.

The data shows that this combo punches above its weight at 1080p and 1440p, where the CPU's 6-core/12-thread configuration and the GPU's 12 GB VRAM combine to deliver frame rates that rival more expensive systems. However, the 4K results pull the overall ranking down, as the GPU cannot maintain high frame rates at that resolution with Ultra settings.

Settings Recommendations

For 1080p gaming, the High preset offers the best balance of visual quality and performance at 195.2 FPS. Players with high refresh rate monitors could consider Low settings for 262.4 FPS, but the visual trade-off is significant. Medium at 230.7 FPS provides a middle ground for those prioritizing frame rate over fidelity.

At 1440p, High settings deliver 123 FPS, which is ideal for 120 Hz displays. Ultra settings at 103.2 FPS remain playable and offer the best visual experience at this resolution. Low settings at 171.9 FPS are unnecessary unless chasing maximum competitive frame rates. The data suggests 1440p High is the sweet spot for this combo.

For 4K, the choice is between Medium at 79 FPS and High at 66 FPS. Both exceed the 60 FPS threshold, but Medium provides a more comfortable margin. Ultra at 53.7 FPS falls below standard 60 Hz refresh rates, making it unsuitable for most players. The recommendation is 4K Medium for a stable experience, with High reserved for displays that support adaptive sync technologies.

Measured FPS Breakdown

At 1920x1080, the combo produces 262.4 FPS on Low, 230.7 FPS on Medium, 195.2 FPS on High, and 157.6 FPS on Ultra. The spread between Low and Ultra is 104.8 FPS, showing the GPU's scaling efficiency across presets. The 1080p results demonstrate that even Ultra settings maintain frame rates well above typical display refresh rates.

At 2560x1440, the measured results are 171.9 FPS on Low, 147.1 FPS on Medium, 123 FPS on High, and 103.2 FPS on Ultra. The transition from 1080p to 1440p reduces performance by approximately 35% across all settings, consistent with the increased pixel count. The 1440p Ultra result of 103.2 FPS indicates the combo can drive high refresh rate 1440p monitors.

At 3840x2160, the frame rates drop to 93.9 FPS on Low, 79 FPS on Medium, 66 FPS on High, and 53.7 FPS on Ultra. The 4K results show a 64% reduction from 1080p performance, with only Low settings exceeding 90 FPS. The Ultra preset at 53.7 FPS is the only measured configuration that fails to reach 60 FPS, confirming the GPU's limitations at this resolution with maximum quality settings.