Doom

The AMD Ryzen 9 9950X3D paired with the AMD Radeon RX 6750 XT delivers a decisively GPU-bound experience in Doom at 4K, but shifts toward a more balanced profile at lower resolutions where the CPU’s immense headroom becomes apparent. The data confirms that this configuration is exceptionally capable for high-refresh-rate 1080p and 1440p play, while 4K Ultra remains the only setting that challenges the GPU’s limits.

Resolution Scaling

The measured FPS data shows a clear and predictable scaling pattern as resolution increases, with the most dramatic drop occurring between 1080p and 1440p. At Low settings, the average frame rate falls from 242 FPS at 1920x1080 to 156 FPS at 2560x1440, a reduction of 86 FPS (35.5%). The gap narrows slightly when moving from 1440p to 4K, where Low settings drop from 156 FPS to 85 FPS, a 71 FPS (45.5%) reduction. This trend indicates that the RX 6750 XT’s pixel throughput becomes the limiting factor as resolution climbs, with the CPU’s massive 16-core/32-thread configuration never becoming a bottleneck in this title.

At High settings, the scaling story is similar but with lower absolute numbers. The average FPS moves from 178 at 1080p to 115 at 1440p (a 35.4% drop) and then to 62 at 4K (a 46.1% drop from 1440p). The consistent percentage drops across settings suggest that the game’s rendering pipeline is heavily dependent on fill rate and memory bandwidth, both of which scale directly with resolution. The RX 6750 XT’s 432.0 GB/s memory bandwidth and 166.4 GPixel/s pixel rate are the key specifications driving this behavior.

The Medium preset shows the most balanced scaling, with averages of 210 FPS at 1080p, 136 FPS at 1440p, and 74 FPS at 4K. The min FPS values recorded for Medium (179 at 1080p, 116 at 1440p, 63 at 4K) indicate that frame pacing remains consistent even when the GPU is under heavy load. The fact that 4K High (62 FPS) and 4K Medium (74 FPS) both stay above the 60 FPS threshold suggests that the GPU can handle 4K gaming, but with little headroom for demanding scenes.

The most telling data point is the 4K Ultra average of 51 FPS, which falls below the 60 FPS playability threshold. This represents a 31.4% drop from 4K High (62 FPS) and a 45.2% drop from 4K Medium (74 FPS). The Ultra preset clearly imposes a significant additional load on the GPU, likely through enhanced shadow quality and post-processing effects that stress the 12 GB of GDDR6 memory and the 2560 shading units.

CPU Role

The Ryzen 9 9950X3D brings overwhelming computational power to Doom, but the benchmark data reveals that this game rarely needs it. With 16 cores, 32 threads, and a boost clock of 5.70 GHz, the CPU’s benchmark scores place it in the 95th percentile of all CPUs, with an average benchmark score of 75779. Its nearest rival, the AMD Ryzen 7 PRO 9755, scores 75738 (a 0.1% delta), showing that the 9950X3D sits at the very top of the performance hierarchy.

In Doom specifically, the CPU’s role is primarily to feed the GPU with enough draw calls and physics calculations to maintain high frame rates. The 3DMark scores are instructive: the single-thread score of 1292 and the 2-thread score of 2549 show that even light-threaded workloads are handled with ease. The 8-thread score of 9259 and 16-thread score of 16374 demonstrate that scaling remains strong, but the game’s engine (based on the FPS data) does not appear to be heavily multithreaded, as frame rates do not increase proportionally with core count.

The high boost clock of 5.70 GHz is likely the more important factor for Doom’s performance. The Cinebench R23 single-core score of 2259 and Geekbench single-core score of 3064 indicate excellent single-thread performance, which is what older or lightly threaded game engines favor. The fact that 1080p Low reaches 242 FPS without any apparent CPU limitation suggests that the processor is never the bottleneck in this configuration, even at extreme frame rates.

The 128 MB of L3 cache, while a defining feature of the X3D series, does not appear to provide a measurable advantage in this title based on the FPS data alone. The data shows that the GPU becomes the limiting factor at every resolution above 1080p, and even at 1080p, the high frame rates are more likely constrained by the GPU’s rendering capabilities than by CPU cache or thread management. The CPU’s 89.6 GB/s memory bandwidth and DDR5 support are sufficient for the game’s data streaming requirements, as evidenced by the consistent frame times across all measured settings.

FAQ

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

A: Yes, but only on Medium (74 FPS average) or High (62 FPS average) settings. The Ultra preset drops to 51 FPS average, which falls below the standard 60 FPS playability threshold. The 4K Medium minimum of 63 FPS indicates that even demanding scenes stay above 60 FPS.

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

A: At 1080p, the system delivers 145-242 FPS depending on settings, making it ideal for 144Hz or 240Hz displays. At 1440p, frame rates range from 94-156 FPS, which comfortably supports 144Hz monitors. The 1440p Low setting at 156 FPS is the best choice for maximum refresh rate.

Q: How does the RX 6750 XT compare to its closest rivals in synthetic benchmarks?

A: The GPU’s average benchmark score is 26011, placing it in the 71st percentile of all GPUs. Its nearest rival, the AMD Radeon R9 M395X, scores 25891 (0.5% lower), while the NVIDIA GeForce RTX 3080 Ti Mobile scores 25740 (1.1% lower). This shows the RX 6750 XT leads its immediate competitors by a narrow margin.

Q: Is the Ryzen 9 9950X3D overkill for this game?

A: Based on the FPS data, yes. The CPU’s 95th percentile ranking and 75779 average benchmark score far exceed what Doom requires. Even at 1080p Low with 242 FPS, the GPU remains the limiting factor. The CPU’s single-thread performance (2259 in Cinebench R23) is what matters most for this title.

Q: What settings provide the largest performance jump?

A: Moving from High to Low at any resolution provides the biggest FPS increase. At 4K, Low (85 FPS) is 37.1% faster than High (62 FPS). At 1440p, the jump is 35.7% (156 vs 115 FPS), and at 1080p it is 36.0% (242 vs 178 FPS). The step from Medium to Low yields smaller gains of 14.9% at 4K, 14.7% at 1440p, and 15.2% at 1080p.

Q: Does the 12 GB VRAM capacity limit performance at 4K?

A: The data does not show a direct VRAM capacity limitation. The 4K Ultra setting (51 FPS) is the only configuration below 60 FPS, but this is consistent with the GPU’s overall performance tier rather than a memory capacity issue. The 432.0 GB/s memory bandwidth is the more relevant specification for 4K rendering.

Measured FPS Breakdown

The measured data provides a complete picture of performance across three resolutions and four settings presets. At 1920x1080, the system achieves its highest frame rates: 242 FPS on Low, 210 FPS on Medium (with a min of 179 and max of 242), 178 FPS on High, and 145 FPS on Ultra. These numbers show that 1080p gaming is exceptionally smooth, with all settings exceeding 144 FPS, making this the ideal resolution for competitive or high-refresh-rate play.

At 2560x1440, performance remains strong but demonstrates the expected GPU workload increase. Low settings produce 156 FPS, Medium averages 136 FPS (min 116, max 157), High reaches 115 FPS, and Ultra drops to 94 FPS. The 1440p Medium minimum of 116 FPS ensures that even the most demanding scenes remain above 100 FPS, while Ultra’s 94 FPS average still provides a smooth experience on most monitors.

The 3840x2160 results reveal the GPU’s limits. Low settings average 85 FPS, Medium averages 74 FPS (min 63, max 85), High averages 62 FPS, and Ultra falls to 51 FPS. The 4K Medium minimum of 63 FPS is notable because it confirms the system can maintain 60+ FPS in all but the Ultra preset. The 4K High average of 62 FPS sits right at the edge, potentially dipping below 60 in extreme scenes, though no min FPS was recorded for that setting.

The pattern across all resolutions is consistent: Low is the fastest preset, followed by Medium, then High, with Ultra always the slowest. The gaps between settings are similar at each resolution, suggesting that the game’s settings have a uniform impact on GPU load regardless of resolution. The Medium preset’s recorded min/max values (179-242 at 1080p, 116-157 at 1440p, 63-85 at 4K) provide the only frame time variance data, showing that frame pacing is tight even under load.

GPU Role

The AMD Radeon RX 6750 XT is the dominant performance factor in this configuration for Doom. With a 71st percentile ranking among all GPUs and an average benchmark score of 26011, it sits comfortably in the mid-to-upper tier of graphics cards. Its nearest rivals include the AMD Radeon R9 M395X (25891, 0.5% lower), AMD FirePro W7100 (25856, 0.6% lower), and AMD FirePro D700 (25842, 0.7% lower), while the NVIDIA GeForce RTX 3080 Ti Mobile trails by 1.1% (25740).

The GPU’s specifications directly explain the measured FPS results. The 2560 shading units operating at a boost clock of 2600 MHz provide the raw compute power, while the 160 texture mapping units and 64 render output units handle texture and pixel processing respectively. The 13.31 TFLOPS FP32 performance and 416.0 GTexel/s texture rate are the key metrics for Doom’s rendering workload, which relies heavily on texture sampling and pixel shading.

Memory bandwidth is particularly critical for Doom’s performance at higher resolutions. The 12 GB of GDDR6 memory on a 192-bit bus delivers 432.0 GB/s, which is sufficient for 4K gaming at Medium and High settings but becomes strained at Ultra. The memory clock of 2250 MHz (18 Gbps effective) provides the bandwidth needed to feed the shading units without stalling, as evidenced by the consistent frame times in the Medium preset measurements.

The GPU’s RDNA 2.0 architecture with 40 ray tracing cores and DirectX 12 Ultimate support suggests it is well-optimized for modern game engines, though Doom’s 2016 release predates widespread ray tracing adoption. The 166.4 GPixel/s pixel rate and 64 ROPs handle the game’s framebuffer operations efficiently, which is why even 4K Medium maintains a 74 FPS average. The GPU’s 250 W TDP and 600 W suggested PSU indicate the power delivery is adequate for sustained performance without throttling, contributing to the stable min FPS values recorded at Medium settings.

Settings Recommendations

The Ultra preset is not recommended for this configuration. At 4K, it delivers only 51 FPS average, which is below the 60 FPS threshold for smooth gameplay. Even at 1080p, Ultra’s 145 FPS average represents a significant 31% drop from High’s 178 FPS, without a proportional visual benefit in most fast-paced action scenes. The GPU’s 71st percentile ranking suggests it is not designed for maximum settings at high resolutions.

The High preset offers the best balance of visual quality and performance for most users. At 1080p, it provides 178 FPS average, which is well above the 144Hz refresh rate common on modern monitors. At 1440p, High maintains 115 FPS, still comfortably above 100 FPS. The 4K High average of 62 FPS is borderline, but acceptable for players who prioritize visual fidelity over absolute frame rates. This preset is the sweet spot for the RX 6750 XT’s capabilities.

For competitive play or maximum frame rates, the Low preset is the clear choice. At 1080p, it delivers 242 FPS, which exceeds the refresh rate of most 240Hz monitors. The 1440p Low setting at 156 FPS still supports 144Hz displays fully. The visual downgrade is significant, but the performance headroom ensures that the GPU never becomes a limiting factor, even in the most chaotic combat sequences.

The Medium preset is the most balanced option for 4K gaming. With 74 FPS average and a 63 FPS minimum, it guarantees smooth gameplay at 4K while maintaining reasonable visual quality. The recorded min/max values (63-85 FPS) show that frame pacing is stable, avoiding the stutter that can occur when frame rates fluctuate wildly. For players with 4K displays, Medium is the recommended preset, as it is the only one that consistently stays above 60 FPS while providing a respectable visual experience.