Doom

The AMD Ryzen 9 5900X paired with the AMD Radeon RX 6800 XT delivers consistently high frame rates in Doom, with the measured data showing 215 FPS at 1080p High, 139 FPS at 1440p High, and 75 FPS at 4K High. Across all twelve tested configurations, this combination ranks 1158th out of 3712 total combos, placing it in the top 31% of all tested pairings. Resolution scaling shows a predictable pattern: moving from 1080p to 4K reduces the average frame rate to roughly 35% of the original value across all settings, confirming that the GPU becomes the primary constraint at higher resolutions.

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 built on the Zen 3 architecture with a 3.70 GHz base clock and a 4.80 GHz boost clock. It carries 64 MB of L3 cache, a dual-channel DDR4 memory bus at 51.2 GB/s, and connects to the system via PCIe Gen 4. The processor's single-thread capability is strong, as reflected in a Cinebench R23 single-core score of 1527 and a multi-core score of 16262. On the 3D Mark max_threads test it scores 10075, while the average benchmark score across the suite is 41376, which lands it in the 87th percentile of all tested CPUs.

Looking at the nearest rivals, the data shows this CPU sits within a narrow band. The Intel Core Ultra 7 366H scores 0.3% higher, the Core Ultra 7 356H scores 0.4% higher, and the AMD Ryzen AI 5 PRO 440 also scores 0.4% higher. The Intel Core i7-3625H? Actually, the pack lists the Intel Core i7-14650HX with a deltaPct of -0.5%, meaning the 5900X scores 0.5% higher than that chip. So the Ryzen 5900X is virtually tied with three of these rivals and has a small lead over the fourth.

For Doom, the CPU alone delivers enough to sustain high frame rates. At 1080p Low, the combo reaches 292 FPS and at 1080p Ultra it still manages 176 FPS. This indicates that even with a frame rate as high as 292, the CPU still possesses headroom, since the GPU becomes the limiting factor when the resolution climbs. The 24-thread design is overkill for a single-threaded game, but the single-thread score is enough to ensure that the GPU is never starved. The processor's role in this combo is to provide a high-latency floor that allows the GPU to reach its own ceiling at 1080p settings of all tiers. At 4K, the CPU's influence largely disappears, as the GPU's rendering requirement dominates the frame rate. The 216-thread count and 4.8 GHz boost clock are far beyond what Doom needs per frame, but they help to maintain a steady flow of frames at 1080p and 1440p, where the frame ceiling is higher.

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

The Radeon RX 6800 XT features 16 GB of GDDR6 on a 256-bit interface, producing a memory bandwidth of 512.0 GB/s. Its base clock is 1825 MHz, with a game clock of 2015 MHz and a boost clock of 2250 MHz. The GPU is powered by 4608 shading units, 288 texture units, 128 ROPs, and 72 RT cores, all built on the RDNA 2.0 architecture. In synthetic tests, the card achieves a PassMark G3D score of 24980, a PassMark GPU Compute score of 13245, and a 3DMark Steel Nomad score of 3689. It sits in the 85th percentile of all GPUs.

Comparing the card to its nearest rivals, the RX 6800 XT scores 1.5% better than the NVIDIA RTX A1000 Mobile in the average benchmark, while it lags the Intel Arc A550M by 2.5% and the NVIDIA GeForce RTX 5070 Ti by 3%. The same-architecture team is within a few percentage points of each other, meaning this GPU is closely competitive. In Doom, the card displays its strengths. At 4K Ultra, it leads to 42.9% FPS, which is just above the 60 FPS typical target. At 4K High it manages 75 FPS, at 1440p Ultra it reaches 114 FPS, and at 1080p Ultra it goes to 176 FPS. The 16 GB VRAM pool is clearly sufficient for the 4K textures in this game, and the memory bandwidth at 512.0 GB/s is high enough to avoid bus-bound bottlenecks.

The GPU's clock behavior shows the for 1080p and 1440p High. When the resolution drops to 1080p, the output is so high that the Intel Argestal—I mean the game's frame rates reach 215 FPS. The card's performance relative to that crowd means DX12 and DPT all have equal, indicating that the RX 6800 XT is likely more than enough to run Doom on 4K optimization. The presence of RT cores and 16 GB VRAM is not directly needed by Doom, but those features do not hurt the GPU's raw fill rate.

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

The FPS measurements across the three resolutions show a consistent scaling pattern. At Low settings, the frame rate drops from 292 at 1080p to 189 at 1440p and then to 102 at 4K. That means 1440p is 35% lower than 1080p (189/292 = 0.647), and 4K is again roughly 35% of 1080p (102/292 = 0.349). For Medium settings, 1080p gives 254 FPS, 1440p gives 165, and 4K gives 89; the fraction for each step is also similar. High settings follow the same trend: 215 → 139 → 75. Ultra: 176 → 114 → 62.

The consistency of about 65% reduction at each resolution change strongly suggests that the GPU is the dominant factor in these drops. If the CPU were the bottleneck, we would expect the pixel-to-pixel scaling to be smaller (since the GPU is capable of a larger frame rate at low but resolution stays the same). Here, the percentage decline matches the pixel count increase: 1440p vs 1080p is 2560×1440 vs 1920×1080 (which is 1.78× the pixel count, or a 44% reduction in resolution using the ratio).

Looking at the exact figures: the drop from 1920 to 2560 reduces the frame to roughly 65% of the original, while the jump from 1440p to 4K similarly cuts by another 35% of the previous result. These are purely multiplicative GPU scaling, since the CPU does not change with resolution. The large 65% reduction between each resolution step shows that the RX 6800 XT is the limiting component for every setting. The CPU can push beyond 292 FPS at 1080p, but the GPU cannot go above that at 4K, even at Low, where the CPU ensures the chain higher. This pattern confirms the GPU-bound nature of the game at 4K settings. At lower resolutions like 1080p, the CPU is still fast enough to extract the GPU's peak, but the GPU is the only reason a Low preset 4K only gives 102 FPS while the same preset at 1080p gives 292.

How This Combo Ranks — use data from a broad set of combos

The comboRankInGame field shows rank 1158 out of 3714 combos tested. That means the 5900X + RX 6800 XT combo is faster than 2554 other configurations, or roughly 68.8% of the database. In other words, it sits above the 68th percentile of all results. The CPU and GPU each individually rank in the 87th and 85th percentile, so this combo's performance is consistent with the strength of its two parts. The difference between the CPU percentile (70) and the GPU percentile (86) suggests that the fixed frame at 4K dips the pair's overall rank, because the GPU itself has room for it.

The actual achieved frame rate - the 1158th rank - is lower than the GPU's percentile would indicate. Because the GPU is held down at 4K by its own capability rather than by the CPU, the combo's overall position may be limited by the times, such as other combos with faster GPUs that post higher 4K numbers. However, for all tested resolutions, this combination remains very capable, especially at 1080p where the frame count is nearly 300 at Low.

No other tested configuration in the pack has the exact same scores; only the percentages are given. The overall position places it into the top 30% of all systems. These ranges are not the margin for reward, as the GPU itself is within 3% of the nearest rival cards, so the title of "top third" is still a fair summary.

FAQ

Q: At what framerate does the system run at 4K Ultra settings?

A: The measured average frame rate at 3840×2160 with the Ultra preset is 62 FPS. There is no minimum or maximum FPS recorded for that configuration, so the average 62 FPS being just above the typical 60 FPS target.

Q: What is the highest FPS recorded for any setting at 1080p?

A: The highest measured average FPS in the entire data set is 92? No, 292 FPS at 1920×1080 Low. The second highest is 254 FPS at Medium. The Ultra preset at 1080p gives 176 FPS, which is still very high.

Q: Is the CPU a bottleneck in Doom at 4K?

A: No, the data shows a 65% reduction for each resolution step on the GPU, and the 1080p Low reaches 292 FPS. If the CPU were the bottleneck, the 4K Low preset would be close to the 1080p value, but it drops to 102 FPS, so the GPU is the limiting factor.

Q: How does the RX 6800 XT compare to its nearest rival in terms of synthetic scoring? For example, the NVIDIA RTX 5070 Ti.

A: The RX 6800 XT trails the RTX 5070 Ti by 3% in its average benchmark score. Against average card it is 1.5% faster than the RTX A1000 Mobile and 2.5% faster than the Intel Arc A550M.

Q: What is the lowest FPS of the measured Medium preset at 4K?

A: the data shows the 3840×2160 Medium preset has a measured minimum FPS of 76, with an average of 89 and a maximum of 103. Only the Medium preset in 4K includes minFPS data; other presets do not.

Q: Is 16 GB of VRAM sufficient for this game?

A: The card’s 16 GB VRAM pool is what the card has installed. The card’s memory bus and bandwidth of 512 GB/s are mentioned in the spec sheet, and the game achieves a 62–102 FPS at 4K, which indicates that the VRAM and memory bandwidth are able to run the game at these settings without overshooting limits. No indication that the memory capacity is the bottleneck.

Settings Recommendations

When selecting a preset, the highest frame rate at each resolution is the low preset, as expected. However, the medium and High presets provide a better balance at believable quality, especially for this GPU.

At 4K Ultra, the frame rate drops to 62 FPS, which is only just above 60. The 4K Medium preset yields an average of 89 FPS with a minimum of 76 FPS, giving a clearer frame pacing and a more comfortable margin above 60. The 4K High preset drops slightly to 75 FPS, but without a measured minimum, but based on the pattern it likely sits between 70 and 75. If you want to maintain a strong experience with a texture and the for shadow quality, Medium at 4K is the best placed - it offers a minimum 76 FPS, and the average is higher than 1440p Low. For the frame advantage is already good, 4K Ultra is mostly acceptable at 62 but it thin; the larger gap from 60 FPS from the min.

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