Doom

The AMD Ryzen 9 9900X3D paired with the AMD Radeon RX 6750 XT delivers a remarkably consistent experience in _Doom_, with performance scaling that clearly identifies the GPU as the primary constraint across most settings. The benchmark data reveals a system that transitions from extreme high-refresh dominance at 1080p to a playable, though less comfortable, 4K experience, with the CPU's substantial headroom never becoming a bottleneck in this 2016 title.

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

The progression from 1920x1080 to 3840x2160 produces a predictable and steep decline in frame rates, but the shape of that decline tells a clear story about where the system's limits reside. At Medium settings, the average frame rate falls from 210 FPS at 1080p to 136 FPS at 1440p, a reduction of 74 FPS, and then drops further to 74 FPS at 4K, representing another 62 FPS loss. This pattern of roughly halving performance with each major resolution step is characteristic of a GPU-bound scenario, where the rendering workload increases quadratically with pixel count while the CPU's contribution remains relatively static.

The scaling magnitude becomes even more pronounced at High settings. The 178 FPS average at 1080p drops to 115 FPS at 1440p and then to 62 FPS at 4K. The 4K figure represents only about 35% of the 1080p performance, which is a severe reduction that underscores how the RX 6750 XT's 12 GB frame buffer and 432.0 GB/s memory bandwidth are being saturated by the higher resolution's demands. Interestingly, the gap between Low and Ultra settings widens considerably as resolution increases. At 1080p, the spread from Low (242 FPS) to Ultra (145 FPS) is 97 FPS; at 4K, that spread narrows to 34 FPS (85 FPS at Low versus 51 FPS at Ultra), suggesting that at 4K, the GPU's compute resources are so fully utilized that even reducing settings cannot fully compensate for the pixel throughput demands.

This data implies that the Ryzen 9 9900X3D, with its 12 cores and 24 threads, is never the limiting factor in this configuration. The CPU's 3DMark max threads score of 13795 and Cinebench R23 multicore result of 47737 indicate a processor with immense parallel capability that _Doom_ simply does not stress, even at 1080p where CPU overhead typically becomes more visible. The FPS drops between resolutions are almost entirely attributable to the GPU's pixel and texture processing limits, not to any CPU-side stalls or thread scheduling bottlenecks.

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

The AMD Radeon RX 6750 XT, built on the RDNA 2.0 architecture with the Navi 22 chip, demonstrates its mid-range positioning through these benchmark results. Its 12 GB of GDDR6 memory on a 192-bit bus provides 432.0 GB/s of bandwidth, which appears sufficient for _Doom_'s texture-heavy environments even at 4K Ultra, where the average FPS still reaches 51. The GPU's boost clock of 2600 MHz and game clock of 2495 MHz help maintain consistent throughput, though the data suggests that raw compute throughput—13.31 TFLOPS FP32—is the more relevant metric for this title's rendering demands.

The VRAM allocation does not appear to be a constraining factor in any of the tested configurations. The consistent performance scaling from Low to Ultra settings at each resolution, without anomalous frame rate collapses that would indicate memory swapping, suggests that 12 GB is ample for _Doom_'s 2016-era assets. The GPU's 40 ray accelerators are irrelevant here, as _Doom_ does not utilize ray tracing, and the DirectX 12 Ultimate support is not fully exercised by this game's rendering pipeline. The texture rate of 416.0 GTexel/s and pixel rate of 166.4 GPixel/s are the specifications that most directly correlate with the observed frame rates, with the 4K Ultra result of 51 FPS representing the point where these rates are most heavily taxed.

The GPU's percentile ranking of 71 among all GPUs places it firmly in the mid-range category, and its average benchmark score of 26011 is nearly identical to the AMD Radeon R9 M395X (deltaPct 0.5), which is an older mobile part. This near-parity in synthetic benchmarks contrasts with the much larger performance gap in _Doom_, suggesting that the RX 6750 XT's RDNA 2.0 architecture is particularly well-suited to this game's OpenGL-style rendering, even if it does not dominate in generic compute workloads.

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

Examining the measured FPS rows, the Medium preset emerges as the balanced recommendation for most users, particularly at 1440p and 4K. At 2560x1440, Medium produces an average of 136 FPS with a minimum of 116 FPS and maximum of 157 FPS, which comfortably exceeds the 60 FPS threshold for smooth gameplay while providing a substantial visual upgrade over Low settings. The 4K Medium result of 74 FPS (minimum 63 FPS) is also well within playable territory, making it the highest quality setting that maintains a consistent 60+ FPS at that resolution.

For users prioritizing maximum frame rates at 1080p, the Low preset's 242 FPS average is exceptional, but the jump to Medium (210 FPS) costs only 32 FPS while providing noticeably better visual fidelity. The Ultra preset, while delivering 145 FPS at 1080p and 94 FPS at 1440p, shows diminishing returns in frame rate per visual quality. At 4K, Ultra drops to 51 FPS, which is below the 60 FPS smoothness threshold and not recommended for competitive play. The data indicates that High settings offer a middle ground—178 FPS at 1080p, 115 FPS at 1440p, and 62 FPS at 4K—but the Medium preset's minimum frame rates (179 FPS at 1080p, 116 FPS at 1440p, 63 FPS at 4K) demonstrate more consistent frame pacing, which is often more important than raw averages for perceived smoothness.

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

At 1920x1080, the system delivers its most impressive results. The Low preset averages 242 FPS, with Medium at 210 FPS (minimum 179 FPS, maximum 242 FPS). High settings produce 178 FPS, while Ultra reduces performance to 145 FPS. This represents a 67% performance difference between the lowest and highest quality presets, indicating that the GPU's shading units and texture units are heavily utilized at this resolution but still have ample headroom.

Moving to 2560x1440, the performance scales down proportionally. Low averages 156 FPS, Medium 136 FPS (minimum 116 FPS, maximum 157 FPS), High 115 FPS, and Ultra 94 FPS. The 1440p results show that even the most demanding settings remain above 90 FPS, making this resolution the sweet spot for high-refresh-rate monitors. The transition from 1080p to 1440p costs between 29% (Low) and 35% (Ultra) of the frame rate, a consistent penalty that reinforces the GPU-bound nature of the workload.

At 3840x2160, the limits of the RX 6750 XT become apparent. Low averages 85 FPS, Medium 74 FPS (minimum 63 FPS, maximum 85 FPS), High 62 FPS, and Ultra 51 FPS. The 4K Ultra result of 51 FPS is the only configuration that falls below the 60 FPS threshold, and even the Low preset cannot reach 100 FPS. The minimum FPS of 63 at Medium settings indicates that this combination can maintain playable performance at 4K, but users seeking consistently high frame rates should target 1440p or lower.

How This Combo Ranks — use comboRankInGame vs other tested combos

The Ryzen 9 9900X3D and RX 6750 XT combination ranks 1301 out of 2930 tested combos in _Doom_, placing it in the 44th percentile of all configurations. This mid-pack ranking is somewhat surprising given the CPU's exceptional performance metrics—the 9900X3D scores in the 91st percentile among all CPUs with an average benchmark score of 54762—but it accurately reflects the GPU's more modest standing. The RX 6750 XT's 71st percentile ranking among GPUs is the limiting factor, and the combo ranking suggests that many other system configurations with stronger GPUs but weaker CPUs would outperform this pairing in _Doom_.

The CPU's nearest rivals in synthetic benchmarks include the Intel Core Ultra 5 245KF (avgScore 55093, deltaPct -0.6) and Intel Core Ultra 5 245K (avgScore 54053, deltaPct 1.3), which are both slightly slower in aggregate benchmarks. However, the GPU's nearest rivals—AMD Radeon R9 M395X (avgScore 25891, deltaPct 0.5), AMD FirePro W7100 (avgScore 25856, deltaPct 0.6), and NVIDIA GeForce RTX 3080 Ti Mobile (avgScore 25740, deltaPct 1.1)—are all older or mobile parts that would likely perform far worse in _Doom_'s specific rendering workload despite similar synthetic scores. This discrepancy highlights how the combo rank in-game can diverge significantly from what component-level benchmarks might predict, emphasizing the importance of game-specific testing.

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

The AMD Ryzen 9 9900X3D's specifications suggest it is dramatically overqualified for _Doom_'s computational demands. With 12 cores and 24 threads based on the Zen 5 architecture, the CPU provides a base clock of 4.40 GHz and a boost clock of 5.50 GHz, complemented by 128 MB of L3 cache. The Cinebench R23 multicore score of 47737 and single-core score of 6739 indicate exceptional throughput in both heavily threaded and lightly threaded workloads, while the 3DMark single-thread score of 1269 confirms strong per-core performance.

_Doom_ is not a title that scales well beyond a handful of threads, so the 9900X3D's 24 threads are largely underutilized. The 3DMark 16-thread score of 12490 versus the max-thread score of 13795 shows that performance gains diminish as thread count increases beyond 16, but even these figures are irrelevant for a game that likely uses fewer than 8 threads effectively. The 128 MB L3 cache, while beneficial for certain CPU-bound scenarios, provides no measurable advantage in this GPU-bound title, as the frame rate data shows consistent scaling with resolution changes that would not occur if the CPU were introducing bottlenecks.

The CPU's 4 nm process node and TSMC foundry production contribute to its 120 W TDP, but power efficiency is not a factor in the benchmark results. The PassMark multi-thread score of 56154 and single-thread score of 4646 place it in the top tier of processors, yet the _Doom_ frame rates are entirely determined by the GPU's capabilities. This pairing demonstrates a significant CPU-GPU performance imbalance, where the processor has enough headroom to support a much more powerful graphics card in this specific game.

FAQ

Q: Can this system run _Doom_ at 4K with smooth performance?

A: Yes, at Medium settings the average FPS is 74 with a minimum of 63 FPS, which is playable. However, Ultra settings drop to 51 FPS average, which is below the 60 FPS threshold for smooth gameplay.

Q: What is the best resolution for high-refresh-rate monitors?

A: At 2560x1440, Medium settings deliver 136 FPS average (minimum 116 FPS), and even Ultra settings maintain 94 FPS. This resolution offers the best balance between visual quality and frame rate for 144Hz displays.

Q: How much performance is lost when moving from 1080p to 1440p?

A: The frame rate drops by approximately 29% at Low settings (242 to 156 FPS), 35% at Medium (210 to 136 FPS), and 35% at Ultra (145 to 94 FPS). This consistent penalty indicates GPU-bound performance.

Q: Is the Ryzen 9 9900X3D being fully utilized in this game?

A: No, the data indicates the CPU is not the limiting factor. The GPU shows clear resolution-based scaling, and the CPU's high multi-thread scores (Cinebench R23 47737) suggest it has substantial headroom that _Doom_ does not leverage.

Q: How does this combo rank compared to other tested systems?

A: It ranks 1301 out of 2930 total combinations in _Doom_, placing it in the 44th percentile. This reflects the GPU's mid-range positioning (71st percentile) rather than the CPU's high-end performance (91st percentile).

Q: What settings should be avoided at 4K resolution?

A: Ultra settings should be avoided at 3840x2160, as they produce an average of only 51 FPS. High settings are borderline at 62 FPS, so Medium (74 FPS) is the recommended maximum for consistent performance at 4K.