Doom

The AMD Ryzen 9 7900X and NVIDIA GeForce RTX 3070 combination delivers a remarkably consistent experience in Doom, with the data showing that the game’s performance scales predictably with resolution and settings. The measured frame rates reveal a system that is overwhelmingly GPU-bound at higher resolutions, while the CPU’s strong single-thread performance ensures that even at 1080p, the processor rarely becomes the limiting factor. This analysis breaks down the measured FPS data to clarify where the bottleneck lies and how to get the best experience from this pairing.

Resolution Scaling

The FPS drop from 1080p to 4K is steep, and it clearly identifies the GPU as the primary constraint at higher resolutions. At High settings, the average frame rate falls from 192.5 FPS at 1920x1080 to 122.2 FPS at 2560x1440, a reduction of roughly 37%. Moving to 3840x2160 drops the average further to 70.2 FPS, which is a 63% decrease from the 1080p baseline. This scaling pattern is a classic sign of a GPU-bound scenario; the RTX 3070’s 8 GB of GDDR6 memory and 448.0 GB/s bandwidth are being taxed heavily as pixel count increases.

The same trend appears across all settings, but the severity varies. At Low settings, the 1080p score of 256.5 FPS falls to 165.8 FPS at 1440p and then to 94 FPS at 4K. The percentage drop from 1080p to 4K is about 63%, which is nearly identical to the High setting’s drop. This consistency suggests that even when the graphical load is reduced, the GPU’s raw compute limits are still being hit at 4K. The data implies that the RTX 3070 is the bottleneck at 4K regardless of preset, while at 1080p, the high frame rates indicate that the CPU’s 12 cores and 24 threads are more than sufficient to feed the GPU.

CPU Role

The Ryzen 9 7900X’s specifications point to a processor that should not bottleneck this game. With a base clock of 4.70 GHz and a boost clock of 5.60 GHz, the Zen 4 architecture provides excellent single-thread performance, which is critical for Doom’s engine. The benchmark data supports this: the CPU scores 1093 in 3dmark_single_thread and 4238 in passmark_single_thread, placing it in the 93rd percentile among all CPUs. In the measured results, the smallest FPS gap between settings occurs at 1080p, where the GPU is less stressed.

For instance, at 1920x1080, the difference between Low and Ultra settings is 256.5 FPS versus 157.8 FPS, a spread of 98.7 FPS. This gap narrows significantly at 4K, where the same settings yield 94 FPS and 56 FPS, a spread of only 38 FPS. This compression at higher resolutions indicates that the CPU is not the limiting factor; if it were, the FPS would remain relatively flat regardless of resolution. The CPU’s 64 MB of shared L3 cache and dual-channel DDR5 memory support further ensure that data can be fed to the GPU quickly, but the numbers show the GPU is the one doing the heavy lifting in this title.

GPU Role

The RTX 3070’s role is central to the performance profile seen here. Its 8 GB of VRAM is a key specification, and the data suggests it is sufficient for Doom at these settings. The 448.0 GB/s memory bandwidth provides ample throughput for the game’s textures, and the GPU’s 5888 shading units handle the rendering load. The GPU’s benchmark scores are solid, with a passmark_g3d score of 22214, though its percentile rank of 72 against all GPUs shows it is a mid-to-high tier part, not a top-end one.

The measured FPS at 4K Ultra is 56 FPS, which is the lowest result in the entire dataset. This indicates that the GPU is fully saturated at this combination. At 4K High, the score jumps to 70.2 FPS, showing that reducing settings from Ultra to High provides a 25% performance uplift. The GPU’s clocks, with a base of 1500 MHz and boost of 1725 MHz, are moderate for the Ampere architecture, but the data shows they are sufficient for high refresh rate gaming at 1440p, where the average FPS stays above 100 in all settings. The GPU is clearly the component that dictates the playable resolution, with 4K being the boundary where the frame rate dips below the 60 FPS threshold at Ultra.

Settings Recommendations

The measured rows show a clear hierarchy of performance, and the best experience depends on the target resolution. For 3840x2160, the data recommends the Medium preset, which delivers an average of 82.1 FPS. This is a comfortable margin above the 60 FPS target, and it provides a significant boost over the High setting’s 70.2 FPS. The Ultra setting at 4K is not advisable, as its 56 FPS average falls below the standard for smooth gameplay. The Low setting at 4K, at 94 FPS, is an option for competitive players, but the visual compromise is substantial.

At 2560x1440, the High preset is the sweet spot. It delivers 122.2 FPS, which is more than enough for high refresh rate monitors, while the Medium preset’s 149.1 FPS offers diminishing returns for the visual quality loss. The Ultra preset at 101.6 FPS is also playable, but the 17% performance drop from High makes it a less attractive choice. For 1920x1080, the Low setting’s 256.5 FPS is the peak for esports-style play, but the High setting’s 192.5 FPS is the best balance, as it maintains a very high frame rate without sacrificing visual fidelity. The data suggests that Medium is a fallback for 4K, while High is the default for 1440p.

FAQ

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

A: Based on the measured data, 2560x1440 is the optimal resolution. At High settings, it achieves 122.2 FPS, which is well above the 60 FPS threshold and suitable for high refresh rate displays. The 4K resolution is playable only at Medium settings, with 82.1 FPS.

Q: Is the CPU or GPU the bottleneck at 1080p?

A: The data indicates the GPU is the limiting factor even at 1080p. The FPS spread between Low (256.5) and Ultra (157.8) is significant, meaning the GPU’s rendering load is the primary constraint. The CPU’s single-thread score of 1093 in 3dmark shows it has ample headroom.

Q: How does the RTX 3070 compare to its nearest rivals in raw compute?

A: The RTX 3070 has an average benchmark score of 28238. It is 0.9% ahead of the AMD Radeon RX 6600 XT and 1% ahead of the NVIDIA GeForce GTX 980 Ti, but 0.6% behind the AMD FirePro S7150. This places it in a tight competitive band.

Q: Can this system handle 4K gaming in Doom?

A: Yes, but with caveats. At 4K Medium, the average FPS is 82.1, which is smooth. At 4K High, it drops to 70.2 FPS, and at 4K Ultra, it falls to 56 FPS, which is below the ideal 60 FPS line. The Medium preset is the recommended 4K choice.

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

A: The average frame rate drops from 192.5 FPS at 1920x1080 to 70.2 FPS at 3840x2160. This represents a 122.3 FPS decrease, or roughly a 63% reduction in performance, highlighting the GPU’s workload at higher resolutions.

Q: Is the Ryzen 9 7900X a strong match for this game?

A: Yes. Its 12 cores and 24 threads are more than adequate, and its 5.60 GHz boost clock provides excellent single-thread speed. Its 93rd percentile ranking among all CPUs confirms it will not hold back the RTX 3070 in this title.

Measured FPS Breakdown

At 1920x1080, the data shows the highest frame rates. With Low settings, the average is 256.5 FPS. Medium settings yield 225.8 FPS, High settings produce 192.5 FPS, and Ultra settings drop to 157.8 FPS. This resolution offers the largest performance headroom, making it ideal for high refresh rate monitors.

Moving to 2560x1440, the frame rates remain strong. Low settings average 165.8 FPS, Medium settings hit 149.1 FPS, High settings achieve 122.2 FPS, and Ultra settings fall to 101.6 FPS. The gap between settings narrows compared to 1080p, showing the GPU taking on more load.

At 3840x2160, the performance drops are most pronounced. Low settings average 94 FPS, Medium settings reach 82.1 FPS, High settings drop to 70.2 FPS, and Ultra settings bottom out at 56 FPS. This resolution pushes the RTX 3070 to its limits, and only the Medium or Low presets are recommended for consistent smoothness.