Doom

This combo pairs the 12-core AMD Ryzen 9 7900X with NVIDIA's flagship RTX 5090, and the measured data for Doom shows a system that is overwhelmingly GPU-bound at every resolution and settings preset tested. The results are consistent with a 2016 title that is well-optimized for high frame rates, where the RTX 5090's raw throughput is the dominant factor, leaving the CPU with ample headroom. The data indicates that users should prioritize graphical fidelity here, as the performance ceiling is rarely challenged by the processor.

Settings Recommendations

The benchmark results show a clear hierarchy across the four presets, with the most significant frame rate cost occurring at the highest quality tier. At 4K, moving from High to Ultra drops the average frame rate from 122 FPS to 96.9 FPS, a reduction of roughly 20% for what is typically a modest visual upgrade in this title. Conversely, stepping down from High to Medium only yields an increase from 122 FPS to 141.6 FPS, while Low pushes it further to 159.3 FPS.

For the best experience on a high-refresh-rate 4K display, the High preset is the optimal choice. It delivers 122 FPS at 4K, which clears the 120Hz threshold that many modern panels target. The Ultra preset is the only one that dips below the 100 FPS mark at 4K, making it harder to justify unless visual fidelity is the absolute priority and the display cannot exceed 96Hz. The Medium preset offers a tangible performance boost, but the visual compromise is usually not worth sacrificing the stability of High.

At 1440p, the situation becomes even more favorable for high settings. High delivers 218.5 FPS, which is well beyond the refresh rate of most 1440p gaming monitors. Ultra still manages a very playable 180.6 FPS. The data suggests that Ultra is a viable choice at this resolution for users with 144Hz or 165Hz displays, as the frame rate remains firmly above those thresholds. For 1080p, all presets exceed 274 FPS, meaning the choice is purely aesthetic; even Ultra at 274.5 FPS will saturate any standard 1080p panel.

GPU Role

The NVIDIA GeForce RTX 5090 is the clear performance driver in this configuration. Its 32 GB of GDDR7 memory on a 512-bit bus provides 1.79 TB/s of bandwidth, which is far more than Doom requires. This memory configuration ensures that there is no bandwidth or capacity bottleneck at any tested resolution. The GPU's clock speeds are listed with a base of 2017 MHz and a boost of 2407 MHz, and its raw compute capabilities—104.8 TFLOPS of FP32 performance—are more than sufficient to handle the game's Vulkan-based rendering engine.

The percentile ranking of the GPU is 94, indicating it outperforms the vast majority of graphics cards in the database. Its nearest rival, the NVIDIA GeForce RTX 5090 D, has an average benchmark score that is only 0.1% higher, showing that this specific card is essentially at the top of the performance stack. The data shows that the GPU's frame rate scaling is nearly linear with resolution changes, which is characteristic of a card that is not being held back by other system components. In Doom, the RTX 5090's architecture is clearly able to brute-force high frame rates regardless of the settings preset.

Resolution Scaling

The frame rate progression from 1080p to 4K reveals a classic GPU-bound scenario. At High settings, the average FPS drops from 338.4 at 1080p to 218.5 at 1440p, and then further down to 122 at 4K. This represents a 64% reduction from 1080p to 4K, which is a substantial cost but not a linear one, indicating that the GPU is being pushed harder as pixel count increases. The 1440p to 4K drop is 44%, while the 1080p to 1440p drop is 35%, showing that the performance penalty accelerates at higher resolutions.

The Low preset tells a similar story but with higher absolute numbers: 444.9 FPS at 1080p, 300.9 FPS at 1440p, and 159.3 FPS at 4K. The fact that 4K Low still produces 159.3 FPS shows just how much headroom the RTX 5090 has in this game. If the system were CPU-bound, we would expect to see the frame rates at 1080p and 1440p to be much closer together, as the CPU would be the limiting factor. Instead, the consistent scaling with resolution confirms that the GPU is the primary constraint, even at the lowest settings where the CPU workload would be relatively higher.

FAQ

Q: Can this combo run Doom at 4K with a 120Hz+ monitor?

A: Yes, at the High preset the measured 4K average is 122 FPS, which is just above the 120Hz mark. The Ultra preset drops to 96.9 FPS, so High is the recommended setting for 120Hz displays.

Q: Is the Ryzen 9 7900X a bottleneck for the RTX 5090 in this game?

A: No. The data shows consistent frame rate scaling with resolution, which indicates the GPU is the limiting factor. The CPU's single-thread performance, with a 3DMark single-thread score of 1093, is more than adequate for this title.

Q: What is the performance difference between the Low and Ultra presets at 1440p?

A: The Low preset averages 300.9 FPS, while Ultra averages 180.6 FPS. This is a 66% performance uplift for Low, but both are far above any standard monitor refresh rate.

Q: How does this GPU compare to its closest rival in terms of raw benchmark scores?

A: The RTX 5090's average benchmark score is 84306, which is 0.1% lower than the RTX 5090 D's score of 84241. This makes them effectively identical in synthetic performance.

Q: Is the 32 GB of VRAM necessary for Doom?

A: No. Doom is not a VRAM-heavy title, but the 32 GB capacity and 1.79 TB/s bandwidth ensure there is no memory-related performance drop at any resolution, even with high-resolution textures enabled.

Q: What frame rate can be expected at 1080p with all settings maxed?

A: At the Ultra preset and 1080p resolution, the measured average is 274.5 FPS. This is more than enough to take advantage of any high-refresh-rate 1080p monitor.

How This Combo Ranks

This specific combination of the Ryzen 9 7900X and RTX 5090 is ranked 9th out of 1681 tested combos in the database for Doom. This places it in the top 0.5% of all configurations tested. The rank is a strong indicator that the pairing is exceptionally well-suited for this title, even though the CPU is not the top performer in its own right.

The CPU's average benchmark score of 50556 places it below its nearest rivals, such as the Intel Core Ultra 5 235 which scores 50598, a delta of -0.1%. This suggests the processor is not the primary reason for the high combo rank. Instead, it is the GPU's dominance that drives this pairing to the top of the list. The 9th place ranking confirms that this is one of the fastest configurations possible for Doom, with only a handful of other GPU/CPU pairings achieving higher frame rates.

CPU Role

The AMD Ryzen 9 7900X provides 12 cores and 24 threads based on the Zen 4 architecture, with a base clock of 4.70 GHz and a boost clock of 5.60 GHz. In Doom, the game does not scale heavily with core count, so the processor's single-thread performance is more relevant than its multi-thread capabilities. The CPU's 3DMark single-thread score of 1093 and its passmark single-thread score of 4238 indicate strong per-core performance that is well-suited for this engine.

Despite having 24 threads, the CPU's multi-thread performance is not the limiting factor here. The benchmark results show that even at 1080p with Low settings, where the CPU workload is at its highest relative to the GPU, the system still achieves 444.9 FPS. This indicates that the CPU is never saturated, leaving the RTX 5090 to do all the heavy lifting. The CPU's percentile ranking of 93 versus all other CPUs shows it is a high-end part, but its closest rivals in terms of average score are the Intel Core i9-13980HX and the AMD Ryzen 9 5900XT, both of which are within 0.8% of its score. For Doom, the 7900X is effectively a non-factor, providing more than enough computational power to feed the GPU at any settings combination.