Doom

The AMD Ryzen 9 5900X and AMD Radeon RX 6600 XT combination delivers a highly capable 1080p and 1440p experience in Doom, with the CPU providing ample headroom and the GPU acting as the primary performance limiter at higher resolutions and settings. The data indicates that this pairing ranks in the 30th percentile of all tested combos for this game, a position driven almost entirely by the GPU's mid-range standing rather than any CPU bottleneck.

CPU Role

The Ryzen 9 5900X is a 12-core, 24-thread processor based on the Zen 3 architecture, with a base clock of 3.70 GHz and a boost clock of 4.80 GHz. Its substantial multi-threading capabilities are reflected in benchmark scores like a Cinebench R23 multi-core result of 33150 and a Passmark multi-thread score of 39002. However, Doom’s engine does not require such extreme thread counts to achieve high frame rates; the single-thread performance is more critical for this title. The processor’s 3DMark single-thread score of 941 and Geekbench single-core score of 2202 indicate strong per-core performance, which is the more relevant metric for this game's frame pacing.

The CPU’s performance relative to its immediate rivals confirms its high-end status. Its average benchmark score of 39453 is 0.2% higher than the AMD EPYC 4245P and 0.9% higher than the Intel Core i7-13700F, while it trails the Intel Core i7-13700 by 1% and the AMD Ryzen 7 PRO 8845HS by 0.7%. These deltas are minuscule, showing that the 5900X is essentially performance-equivalent to its closest competitors in general compute tasks. In the context of Doom, this level of CPU power is far beyond what is necessary to feed the GPU. At 1080p with Low settings, the average frame rate reaches 191.3 FPS, a figure that strongly suggests the CPU is not the limiting factor, as the GPU is still capable of pushing well past 100 FPS in most scenarios. The data shows the processor’s 64 MB of L3 cache and dual-channel DDR4 memory support are more than adequate for the game's data streaming needs.

GPU Role

The AMD Radeon RX 6600 XT is the clear performance bottleneck in this pairing. Built on the RDNA 2.0 architecture with a Navi 23 chip, it features 8 GB of GDDR6 memory on a 128-bit bus, providing 256.0 GB/s of bandwidth. Its boost clock is listed at 2589 MHz. In Doom, the GPU's workload scales directly with resolution and settings, and the measured frame rates reflect this. The GPU’s Passmark G3D score of 16461 places it in the 71st percentile of all GPUs, a solid mid-range standing. Its nearest rivals show a tight cluster of performance: it is essentially tied with the NVIDIA GeForce GTX 980 Ti (0.1% faster for the 6600 XT) and the AMD Radeon R9 M395X (0.4% faster), while the NVIDIA GeForce RTX 3070 is 0.9% faster and the AMD FirePro S7150 is 1.5% faster.

This positioning explains its behavior in Doom. At 4K Ultra, the GPU is overwhelmed, producing just 40.0 FPS. The 8 GB VRAM capacity is sufficient for the game at this resolution, but the raw compute power of the 6600 XT is insufficient to maintain high frame rates. The performance delta between settings at 4K is stark: dropping from Ultra to High yields a 24.75% improvement (from 40.0 to 49.9 FPS), and dropping to Low yields a 74.25% improvement (from 40.0 to 69.7 FPS). This scaling pattern is typical of a GPU-bound scenario, where reducing pixel shading and texture work directly translates to higher throughput.

Settings Recommendations

For a 1080p display, the High preset at 142.2 FPS represents the best balance of visual fidelity and performance, as it provides a frame rate well above the 144 Hz refresh rate of common monitors while maintaining excellent image quality. The Ultra preset at 117.4 FPS is also viable for 60 Hz displays, but the 24.8 FPS drop from High to Ultra is a significant cost for incremental visual gains. At 1440p, the High preset at 91.6 FPS is the recommended choice for smooth gameplay, as it comfortably exceeds 60 FPS. The Medium preset at 108.2 FPS is also a strong contender for players who prioritize higher refresh rates over maximum detail. The Ultra preset at 76.5 FPS is playable but requires a compromise on frame pacing. At 4K, the data suggests that the Low preset at 69.7 FPS is the only playable option for a consistently smooth experience, as the Medium preset at 60.4 FPS is borderline and High at 49.9 FPS is not smooth enough for a fast-paced FPS.

FAQ

Q: Is this CPU-GPU combo capable of 144 FPS gaming in Doom at 1080p?

A: Yes, but only on lower settings. The measured average FPS for 1080p are 191.3 for Low, 165.9 for Medium, and 142.2 for High. Only the Ultra preset at 117.4 FPS fails to reach the 144 FPS threshold.

Q: How does the Ryzen 9 5900X compare to its closest rival, the Intel Core i7-13700F?

A: The average benchmark score of the Ryzen 9 5900X is 39453, which is 0.9% higher than the Intel Core i7-13700F's score of 39095. This indicates a negligible performance advantage in general tasks.

Q: What is the limiting factor for this combo at 1440p?

A: The AMD Radeon RX 6600 XT is the limiting factor. At 1440p, the average FPS drops from 121.4 on Low to 76.5 on Ultra, showing that the GPU's workload is the primary constraint, while the CPU has sufficient headroom to avoid bottlenecking.

Q: Can this combination handle 4K gaming in Doom?

A: Yes, but with significant compromises. At 4K, only the Low preset achieves an average FPS above 60 (69.7 FPS). The Medium preset achieves 60.4 FPS, but High (49.9 FPS) and Ultra (40.0 FPS) fall below smooth playability.

Q: How does the RX 6600 XT's performance compare to the RTX 3070?

A: The RX 6600 XT has an average benchmark score of 27985, which is 0.9% lower than the NVIDIA GeForce RTX 3070's score of 28238. This indicates the RTX 3070 is slightly faster in general compute and likely in gaming.

Q: Is the 8 GB VRAM of the RX 6600 XT a problem in Doom at 4K?

A: The data does not indicate a VRAM capacity issue. The frame rate drops at 4K are more consistent with compute limitations, as the performance scales predictably with preset quality (from 40.0 FPS on Ultra to 69.7 FPS on Low) rather than showing a sudden crash or stutter indicative of memory exhaustion.

Resolution Scaling

The performance drop from 1080p to 4K is steep and clearly demonstrates the GPU's dominance as the limiting component. At High settings, the average frame rate falls from 142.2 FPS at 1080p to 91.6 FPS at 1440p, a 35.6% decrease, and then to 49.9 FPS at 4K, a 64.9% decrease from the 1440p result. This trend is consistent across all settings. For instance, at Low settings, the frame rate drops from 191.3 FPS at 1080p to 121.4 FPS at 1440p, and finally to 69.7 FPS at 4K. The scaling is not linear; the gap between 1440p and 4K is larger than the gap between 1080p and 1440p in absolute terms, which is expected as the pixel count increases by 2.25 times from 1440p to 4K versus 1.78 times from 1080p to 1440p. This behavior indicates that the GPU is saturated with work at higher resolutions, and the CPU's performance remains largely irrelevant. The fact that the 1080p Low preset hits 191.3 FPS, while the 4K Ultra preset only reaches 40.0 FPS, underscores that the RX 6600 XT's compute throughput, not the CPU, dictates the final frame rate.

Measured FPS Breakdown

The measured FPS data provides a complete picture of the combo's performance across resolutions and settings.

At 1920x1080, the average FPS values are: Low 191.3, Medium 165.9, High 142.2, and Ultra 117.4. The difference between Low and Ultra is 73.9 FPS, a 38.6% reduction, showing the cost of maxing out settings.

At 2560x1440, the average FPS values are: Low 121.4, Medium 108.2, High 91.6, and Ultra 76.5. The difference between Low and Ultra is 44.9 FPS, a 37.0% reduction. This resolution is the sweet spot for the combo, as even Ultra remains above 60 FPS.

At 3840x2160, the average FPS values are: Low 69.7, Medium 60.4, High 49.9, and Ultra 40.0. The difference between Low and Ultra is 29.7 FPS, a 42.6% reduction. At this resolution, the settings have a more pronounced impact on the frame rate, and only the Low preset provides a comfortable margin above 60 FPS.

How This Combo Ranks

This specific combination of the AMD Ryzen 9 5900X and AMD Radeon RX 6600 XT is ranked 1186 out of 1681 tested combos in Doom. This places it in the 29.4th percentile of all systems tested, meaning roughly 70% of other CPU-GPU pairings deliver higher average frame rates in this game. The ranking reflects the fact that the GPU is a mid-range part, and while the CPU is high-end, it cannot compensate for the GPU's limitations in a graphically intensive title like Doom. Combos featuring higher-tier GPUs, even with less powerful CPUs, would likely rank higher due to the GPU-bound nature of the game at higher settings. The rank is a direct consequence of the RX 6600 XT's 71st percentile standing among all GPUs, which is the primary determinant of the system's overall gaming performance in this title. The high-end CPU does not significantly improve the rank because it is not a bottleneck at the tested settings.