Doom

The AMD Ryzen 9 7900X and AMD Radeon RX 6800 XT combination delivers a dominant performance in Doom, ranking in the 65th percentile of all tested combos. The data shows exceptionally high frame rates across all resolutions, with the pairing proving to be overwhelmingly GPU-limited at higher settings, while the CPU’s strong single-thread performance ensures no bottleneck even at 1080p.

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

The Ryzen 9 7900X is a 12-core, 24-thread processor based on the Zen 4 architecture, with a base clock of 4.70 GHz and a boost clock of 5.60 GHz. For a fast-paced FPS like Doom, the high boost clock is the critical specification, as the game’s engine relies heavily on single-threaded performance for physics, AI, and draw-call submission. The processor’s 3DMark single-thread score of 1093 and Cinebench R23 single-core score of 6168 place it in the 93rd percentile of all CPUs, indicating that it is more than capable of feeding the GPU at any resolution tested.

The 12-core/24-thread configuration is overkill for Doom, which rarely scales beyond a few threads. However, the benchmark results confirm that this excess capacity does not hurt performance. The CPU’s average benchmark score of 50556 puts it within 0.8% of the Intel Core i9-13980HX, its nearest rival, and a mere 0.1% behind the Intel Core Ultra 5 235. This tight grouping suggests that at the frame rates observed, the CPU is never the limiting factor. Instead, the data indicates that the Ryzen 9 7900X’s job is to stay out of the way, and its high clock speeds ensure it does so with headroom to spare.

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

The Radeon RX 6800 XT is built on the RDNA 2.0 architecture and features 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. With a boost clock of 2250 MHz and a game clock of 2015 MHz, the GPU’s raw compute power is substantial, offering 20.74 TFLOPS of FP32 performance. For Doom, which launched in 2016 and is not particularly demanding by modern standards, this GPU is massively overprovisioned.

The 16 GB VRAM buffer is far beyond what Doom requires, even at 4K Ultra settings. The benchmark results show that the GPU’s 87th percentile ranking among all GPUs, with an average benchmark score of 49982, is driven by its compute capacity rather than memory size. The nearest rival, the Intel Arc A550M, scores 0.5% lower, while the NVIDIA GeForce RTX 4070 Ti SUPER trails by 2.6%. This positioning confirms that the RX 6800 XT is a high-end part that excels in scenarios where the CPU can keep up, and Doom is precisely that scenario.

How This Combo Ranks — use comboRankInGame vs other tested combos

The combination of the Ryzen 9 7900X and RX 6800 XT ranks 591st out of 1681 tested combos in Doom. This places the pairing in the top 35% of all systems tested, which is a strong result given the game’s age and the fact that many newer, more powerful GPUs exist. The rank is not higher primarily because Doom’s frame rates are already so high that the differences between mid-range and top-tier components become marginal.

The combo’s ranking is consistent with the individual component percentiles. The CPU’s 93rd percentile and GPU’s 87th percentile suggest a balanced system, but the game’s frame rate ceiling means that even a 10% faster GPU would only yield a small absolute FPS increase. The data shows that this combo is in the upper echelon, but not the absolute top, which is expected for a 2020 GPU paired with a 2022 CPU in a 2016 game.

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

At 1080p, the combo delivers outstanding performance. With Low settings, the average FPS is 289.7, which drops to 253 at Medium, 212 at High, and 177.2 at Ultra. These numbers indicate that even at the highest settings, the system is pushing well beyond the refresh rate of most monitors.

At 1440p, the frame rates remain extremely high. Low settings produce 188.2 FPS, Medium yields 167, High delivers 139, and Ultra still manages 114.8. The scaling from 1080p to 1440p is linear and predictable, with each setting tier showing a consistent reduction of roughly 30-40%.

At 4K, the performance is still very playable but the GPU starts to feel the pressure. Low settings average 101.7 FPS, Medium drops to 87.5, High falls to 76.7, and Ultra bottoms out at 59.2. The 4K Ultra result is the only configuration that dips below 60 FPS, suggesting that this is the boundary of the GPU’s capabilities in this title.

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

The scaling from 1080p to 4K reveals a clear GPU-limited scenario. At Low settings, the frame rate drops from 289.7 at 1080p to 101.7 at 4K, a reduction of 65%. At Ultra settings, the drop is from 177.2 to 59.2, a 67% decrease. This consistent ~65% reduction across all settings indicates that the GPU is the primary bottleneck, as CPU load does not change significantly with resolution.

The fact that the 1080p Low score of 289.7 is not higher suggests that even at the lowest settings, the CPU is not the limiting factor. If the CPU were the bottleneck, we would expect the 1080p Low score to be much closer to the 1440p Low score. Instead, the linear scaling confirms that the RX 6800 XT is doing all the heavy lifting, and the Ryzen 9 7900X has ample headroom. The 1080p to 1440p drop at High settings is from 212 to 139, a 34% reduction, which is slightly less than the 1080p to 4K drop, further confirming the GPU-bound nature of the workload.

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

For 1080p and 1440p displays, the Ultra preset is the clear recommendation. At 1080p Ultra, the system averages 177.2 FPS, which is well above the 144 Hz refresh rate common on high-end monitors. At 1440p Ultra, the 114.8 FPS average is still excellent and provides a smooth experience on 120 Hz displays. The visual quality gains from Ultra over High are significant in Doom, and the frame rate penalty is manageable.

For 4K, the High preset offers the best balance. The 76.7 FPS average is comfortably above 60 FPS, while Medium at 87.5 FPS does not provide a meaningful visual upgrade to justify the lower quality. The Ultra preset at 59.2 FPS is just below the 60 FPS threshold, so it is only recommended for players who prioritize visuals over smoothness and have a VRR display. The Low preset is unnecessary at any resolution, as even 4K Low at 101.7 FPS is playable, but the visual degradation is not worth the marginal frame rate gain.

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

Q: What is the best settings preset for 1440p gaming with this combo?

A: The Ultra preset is recommended. The data shows an average of 114.8 FPS at 1440p Ultra, which is well above the 60 FPS threshold and suitable for high-refresh-rate monitors.

*Q: Can this system run Doom at 4K with a frame rate above 60?*

A: Yes, but only with reduced settings. At 4K High, the average FPS is 76.7, and at Medium it is 87.5. The Ultra preset drops to 59.2 FPS, which is below the 60 FPS mark.

Q: How does this combo compare to its nearest CPU rival?

A: The Ryzen 9 7900X has an average benchmark score of 50556, which is 0.1% lower than the Intel Core Ultra 5 235 at 50598 and 0.8% lower than the Intel Core i9-13980HX at 50944. These differences are negligible in gaming.

*Q: Is the 16 GB VRAM on the RX 6800 XT sufficient for Doom?*

A: Yes. The game does not require anywhere near 16 GB of VRAM, as evidenced by the high frame rates at 4K Ultra. The GPU’s memory bandwidth of 512.0 GB/s is more than adequate for this title.

Q: What is the frame rate difference between 1080p and 4K at High settings?

A: At 1080p High, the average FPS is 212, while at 4K High it drops to 76.7. This represents a 64% reduction, confirming that the GPU is the limiting component at higher resolutions.

*Q: Does the CPU bottleneck this GPU in Doom?*

A: No. The data shows a linear FPS drop as resolution increases, which is characteristic of a GPU-bound workload. The CPU’s high single-thread performance, evidenced by its 3DMark single-thread score of 1093, ensures it is not a limiting factor.