Doom

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

The AMD Ryzen 9 5900X is a 12-core, 24-thread processor based on the Zen 3 architecture (Vermeer codename), built on TSMC's 7 nm process. It operates with a base clock of 3.70 GHz and a boost clock of 4.80 GHz, with a 105 W TDP. The processor features a 64 KB L1 cache per core, 512 KB L2 cache per core, and a substantial 64 MB L3 cache, which is critical for gaming workloads that benefit from large shared pools of fast memory.

The CPU's benchmark profile shows strong multi-threaded performance, with a 3DMark max-threads score of 10075 and a Cinebench R23 multi-core score of 16262. Single-thread performance is equally solid, evidenced by a 3DMark single-thread score of 941 and a Geekbench single-core score of 2083. The PassMark multithread score of 39002 further confirms this processor's ability to handle demanding workloads, while the data compression score of 499968 indicates robust integer throughput.

In the context of Doom, the game's engine is known for scaling well with both single-thread and multi-thread performance, though the high frame rates observed here suggest that the CPU is not the primary bottleneck. At 1920x1080, where frame rates exceed 300 FPS on Low settings, the 5900X's single-core boost clock of 4.80 GHz ensures that the game's main simulation thread is adequately fed. The 12-core configuration provides headroom for background tasks and any additional threads the id Tech 6 engine may spawn, though the game's real-time demands are more modest than modern AAA titles.

The CPU's percentile ranking of 87 versus all CPUs places it in the upper echelon of processors, with nearest rivals including the Intel Core Ultra 7 366H (avg score 41263, delta +0.3%), Intel Core Ultra 7 356H (41215, +0.4%), AMD Ryzen AI 5 PRO 440 (41208, +0.4%), and Intel Core i7-14650HX (41576, -0.5%). These deltas are minimal, all within 0.5% of the 5900X's average benchmark score of 41376, indicating that the 5900X sits in a tightly contested performance tier where no single rival holds a decisive edge.

For Doom specifically, the CPU's role becomes more pronounced at lower resolutions and settings where the GPU has excess capacity. At 1920x1080 Low, the average frame rate of 338 FPS suggests that the CPU can sustain extremely high frame delivery, though the GPU still does most of the heavy lifting. The 24 threads provide ample parallelism for any background processes, but the game's core loop is largely single-threaded, making the 4.80 GHz boost clock the most relevant specification for this title.

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

The AMD Radeon RX 7900 XT is built on the RDNA 3.0 architecture (Navi 31 chip, Plum Bonito codename) using TSMC's 5 nm process, with a transistor count of 57,700 million on a 529 mm² die. The GPU features 20 GB of GDDR6 memory on a 320-bit bus, delivering 800.0 GB/s of memory bandwidth. Clock speeds include a base of 1387 MHz, a game clock of 2025 MHz, and a boost clock of 2394 MHz, with memory running at 2500 MHz (20 Gbps effective). The 5376 shading units, 336 TMUs, and 192 ROPs provide substantial raw compute, translating to 51.48 TFLOPS of FP32 performance and a pixel rate of 459.6 GPixel/s.

In Doom, the GPU's role is dominant across all measured resolutions. The 20 GB VRAM capacity is far beyond what this 2016 title requires, but the high memory bandwidth is leveraged effectively at 4K resolutions where texture streaming and frame buffer access become more demanding. The boost clock of 2394 MHz allows the GPU to maintain high utilization even when frame rates are extremely high, such as the 338 FPS average at 1080p Low.

The GPU's benchmark data shows a PassMark G3D score of 29009 and a 3DMark Steel Nomad DX12 score of 5623, with Geekbench Vulkan and OpenCL scores of 71068 and 12756 respectively. These scores position the 7900 XT at the 55th percentile versus all GPUs, with an average benchmark score of 13745. Nearest rivals include the AMD Radeon 660M (avg score 13812, delta -0.5%), NVIDIA RTX A2000 Mobile (13821, -0.5%), AMD Radeon RX 570X (13871, -0.9%), and AMD Radeon RX 9070 XT (13543, +1.5%). The small deltas again indicate a closely packed field, though the 7900 XT's performance in Doom is far from marginal — it delivers playable frame rates even at 4K Ultra.

The GPU's DirectX 12 Ultimate support (12_2) and Vulkan 1.4 API compatibility ensure full feature support for Doom's rendering paths. The RDNA 3.0 architecture's high texture rate (804.4 GTexel/s) is particularly relevant for Doom's fast-paced, texture-heavy environments, allowing the GPU to maintain consistent frame times even when the screen fills with enemies and effects.

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

The measured frame rate data provides clear guidance for optimal settings at each resolution. At 3840x2160, the High preset delivers an average of 87 FPS, which is well within the playable range for a fast-paced FPS. The Medium preset at this resolution achieves 103 FPS average with a minimum of 88 FPS and maximum of 119 FPS, offering a smoother experience with only a modest visual trade-off. The Low preset reaches 119 FPS average, while Ultra drops to 71 FPS average. For 4K, the Medium preset is the sweet spot: it provides a 16 FPS improvement over High (103 vs 87) while maintaining a minimum frame rate of 88 FPS that avoids noticeable stutter.

At 2560x1440, all presets deliver high frame rates. The High preset averages 161 FPS, Medium averages 191 FPS (min 162, max 219), Low averages 219 FPS, and Ultra averages 132 FPS. The Medium preset here offers the best balance, with a minimum of 162 FPS that ensures smooth playback on high-refresh-rate monitors, while still providing enhanced visual fidelity over Low. The delta between Low and Medium is only 28 FPS (219 vs 191), making Medium the recommended choice for 1440p gaming.

At 1920x1080, frame rates are exceptionally high across all presets. Low averages 338 FPS, Medium averages 295 FPS (min 251, max 339), High averages 249 FPS, and Ultra averages 203 FPS. The Medium preset is again the optimal choice, as it maintains a minimum of 251 FPS — sufficient for even the most demanding 240 Hz displays — while offering better visuals than Low. The Ultra preset's 203 FPS average is still competitive, but the visual gains over Medium are typically marginal in Doom's fast-paced action, where motion blur and quick camera pans mask subtle detail differences.

The data consistently shows that Medium provides the best experience-to-performance ratio across all three resolutions, with the largest consistent margins between playable and optimal frame rates. Ultra presets at any resolution are only advisable for users prioritizing visual fidelity over frame rate consistency, as the average FPS drops by 16-31% compared to High at the same resolution.

# How This Combo Ranks — use comboRankInGame vs other tested combos

The combination of the AMD Ryzen 9 5900X and AMD Radeon RX 7900 XT ranks 710th out of 3712 tested combinations in Doom, placing it in the top 19.1% of all systems tested. This ranking is notable given the age of the game — the 2016 release has been benchmarked across a wide range of hardware, and this combo's position reflects the GPU's strong performance in this title, especially at higher resolutions where the 7900 XT's 20 GB VRAM and 800 GB/s bandwidth are fully utilized.

The combo's rank is more impressive when considering that the CPU's nearest rivals show negligible performance deltas (all within 0.5%), meaning the ranking is largely determined by the GPU's capability. The RX 7900 XT's performance in Doom exceeds what its 55th percentile overall GPU ranking might suggest, as the game's rendering engine is well-optimized for AMD hardware. The 710th rank out of 3712 combinations indicates that only a small fraction of tested systems (about 19%) can outperform this pairing in Doom, and most of those would feature higher-end GPUs like the RX 9070 XT (which shows a +1.5% delta in overall benchmarks) or faster NVIDIA offerings.

At 4K Ultra, the combo delivers 71 FPS average, which is borderline for competitive play but acceptable for single-player. The more relevant metric is 4K Medium at 103 FPS, which places this combo in a performance tier that comfortably exceeds console capabilities. The ranking data suggests that users seeking higher frame rates at 4K would need to consider GPUs with even more raw compute, but for the vast majority of Doom players, this combination is more than sufficient.

# FAQ

Q: What is the best resolution for this combo in Doom?

A: The data shows playable frame rates at all three tested resolutions. At 3840x2160, the Medium preset averages 103 FPS with a minimum of 88 FPS. At 2560x1440, Medium averages 191 FPS with a minimum of 162 FPS. At 1920x1080, Medium averages 295 FPS with a minimum of 251 FPS. The choice depends on display capability, but 1440p Medium offers the best balance of visual quality and frame rate headroom.

Q: How does the RX 7900 XT's VRAM capacity affect Doom performance?

A: The 20 GB of GDDR6 memory with 800.0 GB/s bandwidth is far more than Doom requires, but the high bandwidth ensures that texture streaming at 4K resolutions never becomes a bottleneck. The measured frame rates show consistent performance across settings, indicating that VRAM capacity is not a limiting factor in any tested configuration.

Q: Is the Ryzen 9 5900X a bottleneck for the RX 7900 XT in Doom?

A: Benchmark results indicate the CPU is not a significant bottleneck. At 1080p Low, the combo achieves 338 FPS average, suggesting the CPU's 4.80 GHz boost clock and 12-core configuration can keep pace with the GPU's output. The CPU's nearest rivals all show performance deltas under 0.5%, confirming that this processor is well-matched for this GPU in Doom.

Q: What is the frame rate difference between High and Ultra settings at 4K?

A: At 3840x2160, the High preset averages 87 FPS, while Ultra averages 71 FPS. This represents a 16 FPS decrease (approximately 18%) for the Ultra preset, which may not justify the visual gains in a fast-paced game where motion blur reduces perceived detail.

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

A: The combo ranks 710th out of 3712 tested combinations, placing it in the top 19.1% of all systems. This ranking is primarily driven by the GPU's strong performance in Doom, as the CPU's benchmark scores are tightly clustered with its nearest rivals.

Q: What minimum frame rates can be expected at 1440p Medium?

A: At 2560x1440 with Medium settings, the measured minimum frame rate is 162 FPS, with an average of 191 FPS and a maximum of 219 FPS. This ensures smooth gameplay even during intense combat sequences with multiple enemies on screen.

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

The measured FPS data provides a comprehensive view of this combo's performance across all three resolutions and four settings presets.

3840x2160 (4K):

• Low: 119 FPS average
• Medium: 103 FPS average, 88 FPS minimum, 119 FPS maximum
• High: 87 FPS average
• Ultra: 71 FPS average

At 4K, the GPU's 20 GB VRAM and 800 GB/s bandwidth are fully engaged. The scaling from Low to Ultra shows a consistent degradation: Low delivers 119 FPS, Medium drops to 103 FPS (a 13.4% decrease), High falls to 87 FPS (a 26.9% decrease from Low), and Ultra bottoms out at 71 FPS (a 40.3% decrease from Low). The Medium preset's minimum of 88 FPS is the only configuration at 4K that maintains a frame rate above 60 FPS at all times.

2560x1440 (1440p):

• Low: 219 FPS average
• Medium: 191 FPS average, 162 FPS minimum, 219 FPS maximum
• High: 161 FPS average
• Ultra: 132 FPS average

At 1440p, the performance headroom is substantial. Low achieves 219 FPS, while Medium averages 191 FPS with a minimum of 162 FPS — a 27.9% drop from Low's average. High averages 161 FPS (a 26.5% decrease from Low), and Ultra averages 132 FPS (a 39.7% decrease). The Medium preset's minimum of 162 FPS is particularly strong, providing consistent frame delivery for high-refresh-rate displays.

1920x1080 (1080p):

• Low: 338 FPS average
• Medium: 295 FPS average, 251 FPS minimum, 339 FPS maximum
• High: 249 FPS average
• Ultra: 203 FPS average

At 1080p, the combo's performance is outstanding. Low averages 338 FPS, Medium averages 295 FPS with a minimum of 251 FPS, High averages 249 FPS, and Ultra averages 203 FPS. The scaling from Low to Ultra shows a 39.9% decrease in average frame rate, but even Ultra maintains a 203 FPS average that exceeds the refresh rate of most gaming monitors. The Medium preset's maximum of 339 FPS nearly matches Low's average, indicating that the GPU is capable of exceptional performance when the settings allow.

Across all resolutions, the data reveals a consistent pattern: Medium settings provide the best balance of visual quality and frame rate stability, with minimum frame rates that are 70-85% of the Low preset's average. The Ultra preset at any resolution is only recommended for users who prioritize graphical fidelity over the frame rate advantages that Medium or High provide. This analysis is based solely on the measured FPS data, which shows no instances of frame rate drops below 71 FPS at any resolution or settings combination, confirming that this combo delivers a consistently smooth experience in Doom across all tested configurations.