Doom

The AMD Ryzen 7 5800X3D paired with the AMD Radeon RX 7900 XTX delivers a formidable performance profile in Doom, with benchmark data showing a clear transition from a CPU-bound scenario at lower resolutions to a GPU-bound scenario as pixel count increases. This analysis breaks down the measured FPS across resolutions and settings, contextualizes the CPU and GPU roles, and ranks the combo against other tested configurations.

Resolution Scaling

The FPS drop from 1080p to 4K is steep and consistent, revealing the shifting bottleneck. At 1920x1080 with Low settings, the combo produces an average of 338.6 FPS. Scaling to 2560x1440 reduces that to 237.7 FPS, a 30% decline, and at 3840x2160, the average falls to 130.1 FPS, a 62% drop from the 1080p baseline. This pattern indicates that at 1080p, the system has ample headroom, with the CPU likely limiting performance; the GPU is not being pushed to its full capacity.

The scaling behavior becomes more pronounced with higher settings. At Ultra settings, the 1080p average is 219.6 FPS, which drops to 143.4 FPS at 1440p (a 35% reduction) and further to 74.6 FPS at 4K (a 66% reduction). The consistent 30-35% reduction from 1080p to 1440p, followed by another 45-50% reduction from 1440p to 4K, suggests that the GPU is the primary limiter at higher resolutions and settings. The data shows that the RX 7900 XTX is fully engaged at 4K, where the frame rate is less than a third of the 1080p Low result, indicating the rendering load is scaling directly with pixel count.

At 4K, the gap between Low and Ultra settings is 55.5 FPS (130.1 vs 74.6). This is a significant spread, demonstrating that the GPU’s compute and memory subsystems are being taxed heavily by the graphical fidelity increases. Conversely, at 1080p, the same settings gap is 119 FPS (338.6 vs 219.6), which is a larger absolute difference, but the relative impact is smaller, suggesting that the CPU’s capability to feed frames is not the limiting factor at the lower resolution.

CPU Role

The AMD Ryzen 7 5800X3D is an 8-core, 16-thread processor from the 5000 series, based on the Zen 3 architecture (codenamed Vermeer) and fabricated on a 7 nm process. It features a base clock of 3.40 GHz and a boost clock of 4.50 GHz. Its cache configuration is notable: 64 KB of L1 per core, 512 KB of L2 per core, and a large 96 MB shared L3 cache. This substantial L3 cache is a key attribute for gaming workloads, as it reduces latency for frequently accessed data.

Benchmark data shows the CPU’s capabilities. In Cinebench R23, it scores 24063 multi-core and 3397 single-core. In 3DMark, it achieves 7299 with 16 threads and 884 single-thread. These scores place it in the 83rd percentile of all CPUs, with an average benchmark score of 26574. Its nearest rival, the AMD EPYC 8024P, has an average score of 26555 (a 0.1% delta), indicating the 5800X3D is competitive with server-grade parts in synthetic tests.

In Doom, the CPU’s role is most evident at 1080p, where the frame rates exceed 300 FPS on Low and Medium settings. The 338.6 FPS at 1080p Low suggests that the CPU’s 8 cores and 16 threads, combined with the high L3 cache, are sufficient to drive the game engine to very high frame rates without becoming a bottleneck. The single-thread performance, as evidenced by the 884 score in 3DMark single-thread and 3397 in Cinebench R23 single-core, is critical for game logic and draw call submission, which often relies on a few powerful threads.

How This Combo Ranks

This specific combination of the Ryzen 7 5800X3D and Radeon RX 7900 XTX ranks 264th out of 1681 tested combos for Doom. This places it in the top 15.7% of all configurations tested, a strong showing that reflects the high-end nature of both components. The rank is a holistic measure of the combo’s ability to run the game, and while it is not the absolute top configuration, the data shows it is well above the median performer.

The ranking is influenced by the balance between the CPU and GPU. The GPU, which sits in the 85th percentile of all GPUs with an average benchmark score of 44019, is a top-tier part. The CPU, in the 83rd percentile, is also strong. The combined rank of 264 suggests that while neither component is the absolute best available, their pairing produces a synergistic result that outperforms a majority of other combinations. The data indicates that the combo is likely limited by the CPU at lower resolutions, but the GPU’s high bandwidth and compute capabilities ensure that the system remains competitive at higher resolutions.

Measured FPS Breakdown

The measured FPS data provides a granular view of performance across all settings and resolutions. At 1920x1080, the averages are 338.6 FPS (Low), 315.9 FPS (Medium), 268.7 FPS (High), and 219.6 FPS (Ultra). The progression shows a 35% reduction from Low to Ultra, which is a moderate impact, reflecting that the CPU can maintain high frame delivery even with increased graphical load.

At 2560x1440, the averages are 237.7 FPS (Low), 203.4 FPS (Medium), 175.6 FPS (High), and 143.4 FPS (Ultra). The drop from 1080p to 1440p is roughly 30% across all settings, indicating a consistent scaling factor. The Ultra setting at 1440p still delivers over 140 FPS, which is well above the refresh rate of most high-refresh-rate monitors, making this a very playable configuration.

At 3840x2160, the averages are 130.1 FPS (Low), 109.8 FPS (Medium), 95.5 FPS (High), and 74.6 FPS (Ultra). This is where the GPU’s workload becomes the dominant factor. The 4K Low result is still above 120 FPS, but the Ultra setting falls below 75 FPS, which is a noticeable drop for fast-paced gameplay. The data shows that for 4K gaming, players may need to adjust settings to maintain high refresh rates, as the Ultra preset pushes the GPU to its limits.

GPU Role

The AMD Radeon RX 7900 XTX is the flagship of the Radeon RX 7000 series, built on the RDNA 3.0 architecture with a 5 nm process. It features a base clock of 1929 MHz, a game clock of 2365 MHz, and a boost clock of 2498 MHz. Its memory subsystem is substantial: 24 GB of GDDR6 on a 384-bit bus, providing a bandwidth of 960.0 GB/s. This high bandwidth is crucial for feeding the 6144 shading units and 384 TMUs at high resolutions.

The GPU’s compute capabilities are reflected in its FP32 performance of 61.39 TFLOPS and its pixel rate of 479.6 GPixel/s. In synthetic benchmarks, it scores 31238 in Passmark G3D and 6841 in 3DMark Steel Nomad DX12. These results place it in the 85th percentile of all GPUs, with an average benchmark score of 44019. Its nearest rival, the AMD Radeon Pro 580, has a delta of -0.4%, indicating the RX 7900 XTX is slightly higher performing than that workstation card.

In Doom, the GPU’s role is clearly defined by the resolution scaling. The 960.0 GB/s bandwidth is essential for the texture-heavy environments, and the data shows that at 4K, the GPU is the limiting factor. The 74.6 FPS at 4K Ultra is a clear indication that the GPU’s raw compute and memory bandwidth are being fully utilized. The 24 GB VRAM is more than sufficient for this game, as even at 4K Ultra, the memory capacity is not a constraint, but the GPU's execution units are. The 61.39 TFLOPS of FP32 compute is leveraged to render the game’s fast-paced action, but the scaling from 1080p to 4K shows that the GPU’s fill rate and shading capabilities are the ultimate arbiter of performance at the highest resolutions.