Doom

The AMD Ryzen 9 9900X paired with the AMD Radeon RX 7900 XT delivers exceptional performance in Doom, ranking in the 80th percentile of all tested combinations. The data indicates a system that prioritizes raw frame rate over resolution headroom, with the GPU acting as the primary scaling factor as resolution increases. This combo is a high-refresh-rate monster at 1080p and 1440p, while still maintaining playable frame rates at 4K, making it a versatile choice for competitive and immersive play alike.

Resolution Scaling

The measured FPS data reveals a classic GPU-bound scaling pattern as resolution increases. At 1080p with High settings, the combo produces 249 FPS, which drops to 161 FPS at 1440p and further to 87 FPS at 4K. This represents a 35% performance hit when moving from 1080p to 1440p, and a 65% reduction from 1080p to 4K. The scaling is nearly linear with pixel count, indicating that the Radeon RX 7900 XT's rendering throughput is the limiting factor at higher resolutions, rather than the CPU.

The pattern holds across all settings presets. With Low settings, the system achieves 338 FPS at 1080p, 219 FPS at 1440p, and 119 FPS at 4K. The 4K Low result still exceeds 100 FPS, which is notable for a demanding title like Doom. However, the gap between 1080p and 4K narrows slightly at lower settings, suggesting that the CPU's 12 cores and 24 threads can keep up with the GPU's demands even when the graphical load is minimal. At Ultra settings, the frame rate drops to 203 FPS at 1080p, 132 FPS at 1440p, and 71 FPS at 4K, showing that the GPU is heavily taxed by the highest quality presets.

The data suggests that at 1080p, there is some headroom for the CPU to flex its muscles, but the GPU still dominates the performance curve. The transition from 1440p to 4K produces a 46% FPS drop at High settings, which is a larger relative decrease than the 35% drop from 1080p to 1440p. This indicates that the RX 7900 XT's memory bandwidth of 800.0 GB/s and 20 GB of GDDR6 memory are sufficient for 1440p but begin to strain at 4K, where the 320-bit bus width becomes a more significant factor. Overall, the scaling is smooth and predictable, with no anomalous spikes or drops that would suggest a driver or architecture bottleneck.

How This Combo Ranks

The combination of the Ryzen 9 9900X and RX 7900 XT achieves a rank of 710 out of 3712 tested combos in Doom, placing it in the top 19% of all configurations. This rank reflects the synergy between a high-end CPU and a high-end GPU, though it is not the absolute top-tier pairing. The data shows that the combo outperforms 80.9% of all other tested systems, which is an impressive feat given the age of the game and the number of possible hardware combinations.

The CPU itself sits at the 92nd percentile against all CPUs, with an average benchmark score of 57498. Its nearest rivals include the AMD EPYC 9015, which scores 57555 (a 0.1% difference), and the Intel Core i9-14900, which scores 58115 (1.1% higher). The Ryzen 9 9900X trails these rivals slightly in raw CPU benchmarks, but in Doom, the game's engine is heavily GPU-dependent, so this small CPU deficit does not translate into a meaningful FPS loss.

The GPU, however, shows a more mixed picture. The RX 7900 XT sits at the 55th percentile against all GPUs, with an average benchmark score of 13745. Its nearest rivals include the AMD Radeon 660M (13812, 0.5% higher) and the NVIDIA RTX A2000 Mobile (13821, 0.5% higher). These are substantially weaker GPUs in real-world gaming, yet they score similarly in synthetic benchmarks, which highlights the importance of game-specific testing. The RX 7900 XT's PassMark G3D score of 29009 is far above these rivals, but the average benchmark score is dragged down by lower scores in other tests. In Doom, the GPU's actual performance is clearly strong, as evidenced by the FPS numbers, but the rank of 710 suggests that there are many other combos with faster GPUs that edge it out.

FAQ

Q: What is the highest average FPS this combo achieves in Doom?

A: The highest average FPS is 338, achieved at 1920x1080 resolution with Low settings. This drops to 249 FPS at High settings and 203 FPS at Ultra settings, showing that even the most demanding preset at 1080p remains well above 200 FPS.

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

A: Yes, but with compromises. At 4K Ultra settings, the average FPS is 71, which is playable but not ideal for high-refresh-rate monitors. Dropping to 4K High settings raises the average to 87 FPS, and 4K Medium reaches 103 FPS. For a smoother experience, 4K Low produces 119 FPS.

Q: How does the CPU's core count affect performance in Doom?

A: The Ryzen 9 9900X has 12 cores and 24 threads, with a base clock of 4.40 GHz and a boost clock of 5.60 GHz. In Doom, the game's engine does not appear to be heavily multi-threaded, as the performance scaling from 1080p to 4K is consistent with GPU limitations. The CPU's strong single-thread performance, evidenced by a Geekbench single-core score of 3010, is sufficient to avoid bottlenecking the GPU at any resolution.

Q: What is the difference between Medium and High settings at 1440p?

A: At 2560x1440, Medium settings produce an average of 191 FPS with a minimum of 162 FPS and a maximum of 219 FPS. High settings produce 161 FPS average. This 30 FPS gap suggests that the Medium preset offers a significant performance boost over High while likely maintaining acceptable visual quality.

Q: Is the RX 7900 XT's 20 GB of memory useful for Doom?

A: While Doom is not a particularly VRAM-hungry game, the 20 GB of GDDR6 memory with 800.0 GB/s bandwidth ensures that there is no memory capacity bottleneck at any resolution or settings preset. The data shows no frame rate anomalies that would indicate memory pressure, even at 4K Ultra.

Q: How does this combo compare to the CPU's nearest rivals in gaming?

A: The Ryzen 9 9900X's nearest rival, the Intel Core i9-14900, has an average benchmark score that is 1.1% higher, and the AMD EPYC 9015 is 0.1% lower. In Doom, these differences are negligible, as the game is GPU-bound. The combo's rank of 710 out of 3712 is more influenced by the GPU than the CPU.

Measured FPS Breakdown

At 1920x1080, the system delivers exceptional performance across all settings. Low settings produce an average of 338 FPS, Medium settings reach 295 FPS with a minimum of 251 FPS and a maximum of 339 FPS, High settings achieve 249 FPS, and Ultra settings drop to 203 FPS. The spread from Low to Ultra is 135 FPS, indicating that the GPU has significant headroom at this resolution, and even the most demanding preset exceeds 200 FPS.

Moving to 2560x1440, the frame rates remain high but show the expected reduction. Low settings average 219 FPS, Medium settings average 191 FPS with a minimum of 162 FPS and a maximum of 219 FPS, High settings average 161 FPS, and Ultra settings average 132 FPS. The gap between Low and Ultra narrows to 87 FPS, showing that the GPU is beginning to feel the load but still maintains over 130 FPS at the highest quality.

At 3840x2160, the performance drops more significantly. Low settings average 119 FPS, Medium settings average 103 FPS with a minimum of 88 FPS and a maximum of 119 FPS, High settings average 87 FPS, and Ultra settings average 71 FPS. The 48 FPS difference between Low and Ultra is the smallest of the three resolutions, confirming that the GPU is the bottleneck at 4K. All presets remain above 60 FPS, which is the minimum for smooth gameplay, but only Low and Medium settings break the 100 FPS barrier.

The Medium settings data is the most complete, with min and max FPS values provided for all three resolutions. At 1080p Medium, the minimum of 251 FPS ensures no noticeable stutter, while at 4K Medium, the minimum of 88 FPS is still well within the playable range. This suggests that Medium is a stable preset that offers a good balance of performance and visual fidelity across all resolutions.

CPU Role

The AMD Ryzen 9 9900X is a 12-core, 24-thread processor based on the Zen 5 architecture, built on a 4 nm process. Its base clock of 4.40 GHz and boost clock of 5.60 GHz provide substantial single-thread performance, which is critical for older game engines like the one powering Doom. The Geekbench single-core score of 3010 and Cinebench R23 single-core score of 2253 confirm that this CPU excels in lightly-threaded workloads.

In Doom, the CPU's role is to feed the GPU with draw calls and physics calculations. The data shows that the CPU is not a bottleneck at any resolution, as the FPS scaling from 1080p to 4K is consistent with GPU-bound behavior. Even at 1080p Low settings, where the GPU has the least work to do, the system achieves 338 FPS, indicating that the CPU can handle the game's demands without limiting the frame rate. The PassMark multi-thread score of 54643 and 3DMark max threads score of 13929 show that the CPU has ample headroom for background tasks and streaming while gaming.

The CPU's 64 MB of L3 cache and dual-channel DDR5 memory support with 89.6 GB/s bandwidth are sufficient for Doom's memory access patterns. The processor's 92nd percentile ranking against all CPUs, with an average benchmark score of 57498, places it slightly below the Intel Core i9-14900 (58115) but above the AMD EPYC 7313 (57399). These differences are minor and do not translate into measurable FPS differences in Doom, as the game's performance is dominated by the GPU.

Settings Recommendations

For the best overall experience, the Medium preset is the recommended choice across all resolutions. At 1080p, Medium delivers 295 FPS average with a minimum of 251 FPS, which is well above the refresh rate of most high-end monitors. At 1440p, Medium produces 191 FPS with a minimum of 162 FPS, ensuring smooth gameplay even in intense combat sequences. At 4K, Medium averages 103 FPS with a minimum of 88 FPS, which is the only preset that combines high visual quality with triple-digit frame rates on a 4K display.

For players with high-refresh-rate 1440p monitors (165 Hz or above), the High preset at 1440p, which averages 161 FPS, is a viable alternative that offers better visuals than Medium while still hitting the refresh rate ceiling. However, the minimum FPS data is not provided for High settings, so players should be aware that frame dips may occur. The Ultra preset at 1440p, averaging 132 FPS, is best reserved for players who prioritize image quality over frame rate, as it still provides a smooth experience on 120 Hz displays.

At 4K, the Ultra preset averages 71 FPS, which is playable but not ideal for competitive play. The High preset at 4K, averaging 87 FPS, is a better balance for most users, offering a significant visual upgrade over Medium while maintaining frame rates above 60 FPS. The Low preset is only recommended for players with 240 Hz monitors at 1080p, where it achieves 338 FPS, or for those who want to maximize frame rate at 1440p (219 FPS) without regard for visual quality. In all cases, the Medium preset provides the most consistent performance, as evidenced by the min and max FPS data showing a tight frame time distribution.