Doom

Doom’s performance with the AMD Ryzen 9 7900X and AMD Radeon RX 7900 XT is dominated by the GPU at every resolution, but the margin of that dominance shifts predictably as resolution scales. The data shows a system that delivers consistently high frame rates, with the CPU’s 12 cores and 24 threads providing ample headroom even at 1080p, where the workload typically becomes more processor-sensitive. The 7900 XT’s 20 GB of VRAM and 800.0 GB/s bandwidth prove sufficient across all tested settings, and the combination ranks in the top 19% of all tested combos for this title, indicating a well-balanced pairing for high-refresh-rate gameplay.

Resolution Scaling

The frame rate delta from 1080p to 4K is steep, confirming that the Radeon RX 7900 XT is the primary bottleneck in this pairing. At High settings, the average FPS drops from 249 at 1920x1080 to 161 at 2560x1440, a 35% reduction, and then further to 87 at 3840x2160, a 46% drop from the 1440p figure. This pattern is consistent across all quality presets, with the absolute frame rate gap between 1080p and 4K narrowing as settings are lowered, which points to the GPU’s pixel throughput limits becoming the sole constraint at higher resolutions.

The scaling behavior reveals that the Ryzen 9 7900X is not a limiting factor in this game. At 1080p Low, the system produces 338 FPS, and even at 4K Low it maintains 119 FPS. The fact that the 1440p to 4K transition at Low settings only costs 100 FPS (219 to 119) suggests that the GPU is still able to leverage its 51.48 TFLOPS FP32 compute effectively, but the rendering load is clearly increasing faster than the GPU’s fill rate can compensate for. The 4K Ultra result of 71 FPS, compared to 203 FPS at 1080p Ultra, represents a 65% performance reduction, which is a typical magnitude for a GPU-bound scenario in a fast-paced FPS.

The data indicates that this combo is best suited for 1440p high-refresh-rate displays, where it exceeds 130 FPS on all settings, or for 4K gaming at Medium or High presets where it remains comfortably above 85 FPS. The 4K Low result of 119 FPS shows that even at the most demanding resolution, the system can push past 100 FPS when visual fidelity is reduced, but the gap between Low and Ultra at 4K (119 vs 71 FPS) highlights that the 7900 XT’s 192 ROPs and 459.6 GPixel/s pixel rate are the deciding factor in this title.

GPU Role

The Radeon RX 7900 XT’s specifications directly explain its performance in Doom. With 20 GB of GDDR6 memory on a 320-bit bus, the 800.0 GB/s memory bandwidth ensures that texture streaming and high-resolution assets do not cause stuttering, even at 4K Ultra where the average FPS dips to 71. The GPU’s boost clock of 2394 MHz and game clock of 2025 MHz are solidly utilized, as evidenced by the linear scaling of frame rates with resolution changes, rather than any sudden cliff-like drops that would indicate VRAM capacity or bandwidth exhaustion.

The GPU’s benchmark scores reinforce its mid-range positioning in the broader database, with a Passmark G3D score of 29009 and a percentile rank of 55 among all GPUs. Interestingly, its nearest rivals in the average benchmark score include the AMD Radeon 660M and NVIDIA RTX A2000 Mobile, which are mobile or integrated parts, but the deltaPct values are minimal (within -0.5% to 1.5%), indicating that the 7900 XT’s synthetic average score is clustered tightly with these parts. However, in Doom specifically, the measured FPS shows the card’s real-world strength, with the 4K High result of 87 FPS proving that the RDNA 3.0 architecture’s 84 RT cores and 5376 shading units are more than capable for this title’s rendering demands.

The GPU’s 300 W TDP and dual-slot design suggest a power-hungry part, but the performance data shows it is well-utilized here. The medium preset at 1080p produces 295 FPS (with a min FPS of 251), which is 17% higher than High settings, showing that the card scales efficiently with reduced shader complexity. The 4K Ultra result of 71 FPS, while playable, is the only setting where the frame rate dips below the 85 FPS threshold, indicating that the GPU’s fill rate is the ultimate ceiling for this combination in Doom.

How This Combo Ranks

Among the 3,712 tested combinations in this database, this pairing of the Ryzen 9 7900X and Radeon RX 7900 XT ranks 710th for Doom, placing it in the 81st percentile. This rank is respectable, though not elite, and it reflects the fact that while the CPU is a top-tier part (91st percentile among all CPUs), the GPU’s 55th percentile standing drags the overall combo ranking down slightly. The rank of 710 means that a significant number of other combinations, likely those pairing the 7900 XT with even stronger CPUs or using higher-end GPUs, outperform this setup in this specific title.

The CPU’s nearest rivals in average benchmark score, such as the AMD EPYC 7313P and Intel Xeon 634, have deltaPct values of 0.2% and 0.6% respectively, which are negligible differences in synthetic tests. In gaming, however, the Ryzen 9 7900X’s 12 cores and 5.60 GHz boost clock provide a distinct advantage over these server-class parts, particularly in maintaining high minimum frame rates. The GPU’s nearest rivals, including the AMD Radeon RX 9070 XT with a deltaPct of 1.5%, show that the 7900 XT is marginally slower in average benchmark terms, but this does not translate to a meaningful FPS difference in Doom, where the measured results are consistently strong.

The combo rank of 710 out of 3712 suggests that for 4K gaming, there are faster options, but for 1440p gaming at high refresh rates, this pairing is exceptionally well-suited. The 1080p results, exceeding 200 FPS on all settings, demonstrate that the combo is not CPU-limited, as even the most demanding Ultra preset at 1080p produces 203 FPS, which is only 18% lower than the 4K Low result of 119 FPS. This indicates that the combo’s rank is primarily driven by GPU performance, and any user seeking higher 4K frame rates would need to look at a more powerful GPU, rather than a different CPU.

FAQ

Q: What is the average FPS at 4K Ultra settings with this combo?

A: The measured average FPS at 3840x2160 with Ultra settings is 71 FPS, which is the lowest result in the dataset for this pairing.

Q: How much faster is 1080p compared to 4K at High settings?

A: At High settings, the average FPS is 249 at 1920x1080 compared to 87 at 3840x2160, representing a 186% increase in frame rate at the lower resolution.

Q: Does the Ryzen 9 7900X bottleneck the Radeon RX 7900 XT in Doom?

A: The data suggests no CPU bottleneck, as the 1080p Low result of 338 FPS and 1440p Low result of 219 FPS indicate that the CPU is capable of feeding the GPU far beyond what is needed for typical display refresh rates.

Q: What is the minimum FPS recorded for this combo?

A: The only min FPS values provided are for Medium settings: 88 at 4K, 162 at 1440p, and 251 at 1080p. No min FPS data is available for other settings.

Q: How does this combo rank among all tested combinations for Doom?

A: The combo ranks 710th out of 3,712 total combinations, placing it in the top 19% of all tested setups.

Q: Is 20 GB of VRAM sufficient for Doom at 4K?

A: Yes, the 20 GB of GDDR6 memory on the 7900 XT is more than adequate, as the 4K Ultra result of 71 FPS shows no signs of memory-related performance collapse, and the bandwidth of 800.0 GB/s is sufficient for this title’s asset streaming.

Measured FPS Breakdown

At 1920x1080, the system delivers exceptional performance across all settings. Low settings produce an average of 338 FPS, Medium averages 295 FPS (with a min of 251 and max of 339), High averages 249 FPS, and Ultra averages 203 FPS. The scaling from Low to Ultra is a 40% reduction, which is moderate and indicates that the GPU is not heavily stressed at this resolution, leaving headroom for the CPU’s 12 cores to manage game logic.

At 2560x1440, the frame rates remain high but show the GPU beginning to work harder. Low settings average 219 FPS, Medium averages 191 FPS (min 162, max 219), High averages 161 FPS, and Ultra averages 132 FPS. The drop from 1080p to 1440p is consistent at roughly 34-36% across all settings, which is a linear scaling pattern that points to pixel count being the primary variable.

At 3840x2160, the GPU is clearly the limiting factor. Low settings average 119 FPS, Medium averages 103 FPS (min 88, max 119), High averages 87 FPS, and Ultra averages 71 FPS. The transition from 1440p to 4K costs 46-49% of the frame rate at each setting, which is a larger percentage drop than the 1080p to 1440p transition, confirming that the 7900 XT’s fill rate is saturated at 4K. The Ultra setting at 4K is the only configuration that dips below 85 FPS, making it the least desirable for competitive play, though it remains playable for single-player experiences.

CPU Role

The AMD Ryzen 9 7900X, with its 12 cores and 24 threads based on Zen 4 architecture, provides a robust foundation for Doom’s multi-threaded engine. The CPU’s base clock of 4.70 GHz and boost clock of 5.60 GHz ensure that single-threaded performance is strong, as evidenced by its Cinebench R23 single-core score of 2016.5 and Geekbench single-core score of 2617. In a game like Doom, which is known for its efficient rendering pipeline, the CPU’s high boost clock is more critical than core count, and the 7900X delivers on this front.

The multi-threaded capabilities are also relevant, as the CPU’s Cinebench R23 multi-core score of 29300 and Passmark multithread score of 51406 demonstrate. However, the gaming data shows that the CPU is not the bottleneck, as even at 1080p Low where CPU overhead is typically highest, the system achieves 338 FPS. This suggests that the game’s render thread is well-optimized for the Ryzen 9 7900X’s architecture, and the 64 MB of shared L3 cache likely helps with data locality for game assets.

The CPU’s 91st percentile ranking among all CPUs, with an average benchmark score of 53288, places it slightly above the AMD EPYC 7313P (0.2% delta) and Intel Core i7-14700F (-0.6% delta). In Doom, this CPU performance translates to headroom that allows the GPU to operate at its full potential. The fact that the 1080p Ultra result of 203 FPS is not significantly higher than the 1440p Ultra result of 132 FPS (a 35% drop) confirms that the GPU, not the CPU, is the limiting factor, and the 7900X’s role is to ensure that frame times remain consistent without introducing stutter, which is supported by the high minimum FPS values recorded at Medium settings across all resolutions.