Doom

The AMD Ryzen 9 9900X paired with the AMD Radeon RX 7800 XT delivers a compelling 1080p experience in Doom, but the data reveals a clear shift in system bottlenecks as resolution climbs. This combination, ranking 621st out of 1681 tested combos, demonstrates that while the CPU is a powerhouse, the GPU becomes the primary constraint at higher resolutions, a dynamic that shapes the entire performance profile.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data shows a dramatic and consistent decline as resolution increases, which is a classic indicator of GPU-bound performance. At 1080p with Ultra settings, the combo achieves 169.8 FPS. Moving to 1440p drops this to 112.2 FPS, a reduction of 57.6 FPS (or roughly 34%). The jump to 4K is even more punishing, with the Ultra preset falling to 59.2 FPS, a further 53 FPS decline from 1440p. This steep, nonlinear drop is the signature of the Radeon RX 7800 XT's rendering limits being reached, not the CPU's.

The pattern holds across all settings presets. At High settings, the drop from 1080p (207.5 FPS) to 1440p (135.1 FPS) is 72.4 FPS, and then to 4K (71.1 FPS) is another 64 FPS. Even at Low settings, where the load on the GPU is minimized, the scaling from 1080p (280 FPS) to 1440p (182.5 FPS) and then to 4K (101.2 FPS) shows a similar proportional decline. This consistency suggests that the Ryzen 9 9900X is not the limiting factor at any resolution; if it were, the FPS would plateau or become erratic as resolution increases, which is not the case here.

The data implies that for this game, the RX 7800 XT's compute and memory bandwidth are the primary determinants of frame rate. The 4K Ultra result of 59.2 FPS is particularly telling, as it hovers at the edge of what many consider playable, indicating that the GPU is working at its absolute maximum. In contrast, the 1080p Low result of 280 FPS shows the GPU can push far beyond typical refresh rates when the workload is light, but the CPU is still able to feed it without becoming a bottleneck, as the frame rate scales smoothly with resolution changes.

How This Combo Ranks — use comboRankInGame vs other tested combos

With a combo rank of 621 out of 1681 tested configurations, this pairing sits in the upper-middle tier of all tested systems for Doom. This ranking is a holistic measure that combines the strengths of both components. The Ryzen 9 9900X is a high-end processor, evidenced by its 94th percentile ranking against all CPUs, while the RX 7800 XT is a solid upper-midrange GPU, sitting in the 76th percentile against all GPUs.

The combination's rank suggests that while the CPU is overqualified for the task, the GPU's performance ceiling prevents the system from cracking the top tier. The data shows this is not a weak pairing, but rather one where the GPU is the limiting factor. The 621st rank out of 1681 indicates that many other combos, likely featuring more powerful GPUs, achieve higher average FPS in this title. However, the strong CPU ensures that the system never becomes CPU-bound, which is a distinct advantage in maintaining consistent frame times even when the GPU is maxed out.

The deltaPct values for the CPU's nearest rivals are all within a narrow band (from -1.8% to +0.7%), indicating that the Ryzen 9 9900X's processing power is comparable to its direct competitors. This means the difference in overall combo rank is almost entirely attributable to the GPU choice. The data suggests that swapping in a more powerful GPU would yield a significant improvement in the combo's ranking, while the CPU would not need to be changed to see that benefit.

Settings Recommendations — which preset gives the best experience per the measured rows

For a balance of visual quality and performance, the High preset at 1440p is the standout recommendation. The data shows 135.1 FPS at this setting, which is a substantial improvement over the 4K High result of 71.1 FPS and remains well above the 60 FPS threshold for smooth gameplay. At 1080p, High delivers 207.5 FPS, which is excellent for high-refresh-rate monitors, but the visual uplift from 1440p is often considered worth the frame rate trade-off.

The Medium preset also holds up well, offering 160.7 FPS at 1440p and 246.1 FPS at 1080p. This suggests that if a user prefers to maximize frame rates on a 144Hz or 165Hz monitor, dropping from High to Medium at 1440p yields an extra 25.6 FPS. However, the Ultra preset is only recommended for 1080p, where it achieves 169.8 FPS. At higher resolutions, Ultra's demands are too steep: 112.2 FPS at 1440p and just 59.2 FPS at 4K, the latter of which may not provide a consistently smooth experience.

The Low preset, while providing the highest frame rates (280 FPS at 1080p), is generally unnecessary given the ample performance headroom at higher presets. The data indicates that the most efficient use of this hardware is to target High or Medium at 1440p, where the frame rates are high enough to satisfy most gamers while maintaining a strong visual presentation. Choosing Ultra at 4K is possible, but the 59.2 FPS average suggests it is only viable for those who prioritize image quality over frame rate consistency.

FAQ — 4-6 Q&A pairs answerable from FACT PACK data

Q: Can this combo run Doom at 4K with playable frame rates?

A: Yes, but only on lower presets. At 4K with High settings, the average FPS is 71.1, and at Medium it is 88.3. However, the Ultra preset drops to 59.2 FPS, which is near the minimum for smooth play. The Low preset at 4K achieves 101.2 FPS.

Q: What is the best resolution to use with this hardware for a 144Hz monitor?

A: 1440p is the optimal choice. At 1440p with High settings, the combo achieves 135.1 FPS, which is close to a 144Hz target. The Medium preset reaches 160.7 FPS, exceeding it. At 1080p, frame rates are much higher, but the visual detail at 1440p is superior.

Q: How does the CPU's performance compare to its closest rivals?

A: The Ryzen 9 9900X has an average benchmark score of 54450, placing it in the 94th percentile. Its nearest rival, the AMD Ryzen 9 9900X3D, scores 54681, a marginal difference of -0.4%. The Intel Core i7-14700F scores 54097, which is 0.7% higher, while the Intel Core Ultra 5 245K and 245KF are 1.5% and 1.8% higher, respectively.

Q: Is the GPU a bottleneck for this CPU in Doom?

A: Yes, the benchmark results strongly suggest so. The FPS drops consistently and significantly with each resolution increase, from 169.8 FPS at 1080p Ultra to 59.2 FPS at 4K Ultra. This pattern indicates that the GPU's rendering capacity is the primary limit, as the CPU's performance headroom is not being exhausted.

Q: What is the performance difference between the Low and Ultra presets at 1080p?

A: The difference is substantial. At 1080p, the Low preset delivers 280 FPS, while the Ultra preset delivers 169.8 FPS. This represents a performance reduction of 110.2 FPS when moving from Low to Ultra, which is roughly a 39% decrease.

GPU Role — VRAM, clocks, and how they relate to this game's results

The AMD Radeon RX 7800 XT features 16 GB of GDDR6 memory on a 256-bit bus, providing a memory bandwidth of 624.1 GB/s. This memory configuration is more than sufficient for Doom at all tested settings, as the game is not known for being VRAM-heavy, and the data shows no signs of memory-related stuttering or performance cliffs. The GPU's boost clock of 2430 MHz and game clock of 2124 MHz are key to its compute throughput, which directly drives the FPS numbers observed.

The GPU's 60 RT cores and 3840 shading units are indicative of its raw processing power. The FP32 performance of 37.32 TFLOPS is the theoretical peak for this chip, and the benchmark results show it is being utilized effectively. The data shows a clear correlation between the GPU's workload and FPS: as the resolution increases, the number of pixels to process grows, and the FPS drops proportionally. This is a textbook example of a GPU-bound scenario, where the card's pixel fill rate and shading rate are the limiting factors.

The 4K Ultra result of 59.2 FPS is the most telling data point. It shows the GPU is nearly maxed out at this setting, just barely maintaining a 60 FPS average. The move from Low to Ultra at 1080p, which reduces FPS from 280 to 169.8, also highlights how much headroom the GPU has at lower resolutions. This headroom is what allows for such high frame rates at 1080p, but it is exhausted quickly as the resolution climbs, confirming the GPU's role as the primary performance limiter in this configuration.

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 9 9900X is a 12-core, 24-thread processor based on the Zen 5 architecture, with a base clock of 4.40 GHz and a boost clock of 5.60 GHz. Its high single-thread performance, evidenced by a Geekbench single-core score of 3341 and a Cinebench R23 single-core score of 6555, is crucial for gaming. The data from Doom shows that this CPU is never a limiting factor, as the FPS scales smoothly with resolution, which is the expected behavior when the GPU is the bottleneck.

The CPU's large 64 MB of shared L3 cache and 1 MB per-core L2 cache provide ample fast memory for game data, reducing the need to access slower system memory. Its dual-channel DDR5 memory support, with a bandwidth of 89.6 GB/s, is also sufficient for feeding the GPU with draw calls and geometry data. The benchmark scores, such as the 3DMark max threads score of 13929 and the PassMark multithread score of 54643, show the CPU's immense parallel processing capability, which is not fully utilized in this game but ensures no frame drops due to CPU stalls.

The CPU's 94th percentile ranking against all CPUs indicates it is a top-tier part. Its nearest rival, the Ryzen 9 9900X3D, has a nearly identical average score, differing by only -0.4%. This suggests that even a CPU with 3D V-Cache would not significantly change the Doom results, further reinforcing that the GPU is the component to upgrade for better performance in this title. The CPU's strength is in providing a stable, high-performance foundation that does not interfere with the GPU's output.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

At 1920x1080, the combo shows its highest performance. The Low preset achieves 280 FPS, Medium reaches 246.1 FPS, High delivers 207.5 FPS, and Ultra produces 169.8 FPS. This represents a wide range of options, with the difference between Low and Ultra being 110.2 FPS. The scaling from Low to Ultra is not linear, with the largest single drop occurring between Low and Medium (33.9 FPS), followed by a 38.6 FPS drop to High, and a final 37.7 FPS drop to Ultra.

Stepping up to 2560x1440, the frame rates remain high but show a clear performance cost. Low settings yield 182.5 FPS, Medium produces 160.7 FPS, High reaches 135.1 FPS, and Ultra drops to 112.2 FPS. The gap between Low and Ultra here is 70.3 FPS. The relative performance drop from 1080p to 1440p is consistent across presets, ranging from a 34.8% reduction at Low to a 33.9% reduction at Ultra, indicating a uniform GPU workload increase.

At 3840x2160, the GPU is clearly the primary constraint. The Low preset delivers 101.2 FPS, which is still playable, while Medium produces 88.3 FPS. High settings yield 71.1 FPS, and Ultra drops to 59.2 FPS. The difference between Low and Ultra at 4K is 42 FPS. The scaling from 1440p to 4K shows a more significant drop than from 1080p to 1440p, with the Ultra preset losing 53 FPS, which underscores the exponential cost of rendering four times the pixels. The data shows that this combo is best suited for high-refresh-rate 1440p gaming, with 4K being possible only at lower settings presets.