Doom

Resolution Scaling

Resolution scaling in Doom reveals a system that remains heavily GPU-bound at every setting tier, though the margin narrows dramatically as resolution drops. Moving from 3840x2160 to 2560x1440 at High settings, average frame rate jumps from 125 FPS to 231 FPS, a 106 FPS improvement. The subsequent drop to 1920x1080 yields 309 FPS, another 78 FPS gain. This progression shows that the RTX 5090 D still has headroom at 1440p, but the CPU begins to exert influence at 1080p.

The Low preset tells a similar story with different magnitudes. At 4K Low, the system produces 170 FPS; at 1440p Low, it reaches 297 FPS; and at 1080p Low, it hits 344 FPS. The scaling from 1440p to 1080p is just 47 FPS, compared to the 127 FPS jump from 4K to 1440p. This compression indicates that at 1080p Low, the AMD Ryzen 7 5700G's 8 cores and 16 threads are approaching their limit for this game, even though the GPU remains the primary bottleneck.

Ultra settings show the steepest resolution penalty. At 4K Ultra, the system manages 102 FPS. Dropping to 1440p Ultra improves this to 189 FPS, and 1080p Ultra reaches 287 FPS. The 4K-to-1440p delta of 87 FPS is proportionally larger than the 1440p-to-1080p delta of 98 FPS, suggesting that at Ultra settings, pixel throughput dominates until lower resolutions allow other factors to surface.

The limiting component analysis points squarely at the GPU for 4K and 1440p, with the CPU becoming a secondary consideration only at 1080p. The RTX 5090 D's 32 GB of GDDR7 memory and 1.79 TB/s bandwidth are clearly sufficient for Doom's texture workloads at any resolution. The frame rate differences between resolution tiers at identical settings are far too large to attribute to CPU limitations; a CPU-bound scenario would show minimal FPS variance across resolutions.

GPU Role

The NVIDIA GeForce RTX 5090 D is the dominant force in this pairing, and the data leaves no doubt about its capabilities in Doom. Its 32 GB GDDR7 memory on a 512-bit bus provides 1.79 TB/s of bandwidth, which the benchmark results confirm is more than adequate for this title. The GPU's 21760 shading units and 680 texture mapping units process Doom's geometry and effects with substantial headroom, as evidenced by the consistently high frame rates across all tested configurations.

The GPU's clock behavior matters here. With a base clock of 2017 MHz and a boost clock of 2407 MHz, the RTX 5090 D maintains high throughput even under sustained load. The 104.8 TFLOPS of FP32 compute ensures that even the most demanding Ultra preset at 4K stays above 100 FPS, which is a remarkable result for a game from 2016 with modern hardware pushing it far beyond its original target.

The GPU's 92nd percentile ranking among all GPUs, with an average benchmark score of 77712, places it in the upper echelon of graphics hardware. Its nearest rivals in synthetic benchmarks include the AMD Radeon RX 6850M XT at -1.6% and the NVIDIA Tesla P100 PCIe 16 GB at -2.4%, but these are mobile and compute-oriented parts respectively. In Doom specifically, the RTX 5090 D's performance is showcased by the fact that even the lowest tested frame rate — 102 FPS at 4K Ultra — would be considered excellent for most systems.

The memory subsystem deserves particular attention. While Doom may not require 32 GB of VRAM at any of these settings, the sheer bandwidth available ensures that texture streaming and memory compression never become limiting factors. The 1750 MHz memory clock with 28 Gbps effective speed translates to the 1.79 TB/s figure that allows the GPU to feed its 680 texture mapping units without starvation. This is why the GPU can deliver 344 FPS at 1080p Low — the memory bandwidth is sufficient to keep the rendering pipeline fully saturated.

CPU Role

The AMD Ryzen 7 5700G serves as the supporting actor in this configuration, and its role becomes more apparent as resolution decreases. This 8-core, 16-thread processor based on Zen 3 architecture with Cezanne codename operates at a base clock of 3.80 GHz and a boost clock of 4.60 GHz. Its 16 MB of L3 cache and 51.2 GB/s memory bandwidth are modest by modern standards, but they are sufficient for Doom's engine.

The CPU's benchmark scores place it in the 79th percentile among all CPUs, with an average score of 27051. Its nearest rival, the Intel Core i9-9900K, scores 27097 (-0.2%), while the AMD Ryzen AI 7 445 scores 26936 (+0.4%). This puts the 5700G in a competitive position for gaming workloads, though its single-thread performance — a 3dmark single-thread score of 899 and Cinebench R23 single-core score of 1494 — is where it matters most for frame pacing in Doom.

At 1080p Low, the system produces 344 FPS, which is likely approaching the CPU's ceiling for this game. The 47 FPS improvement from 1440p Low (297 FPS) to 1080p Low (344 FPS) is notably smaller than the 127 FPS improvement from 4K Low (170 FPS) to 1440p Low (297 FPS). This diminishing return indicates that at 1080p, the CPU's ability to feed draw calls and game logic becomes a factor, even if the GPU still has rendering headroom.

The CPU's 16 threads are well-suited for Doom's multi-threaded rendering pipeline, but the game's age means it likely doesn't scale perfectly across all cores. The 3dmark scores show strong scaling from 2 threads (1758) to 8 threads (5648) and 16 threads (6629), but the incremental gain from 8 to 16 threads is modest — just 981 points. This suggests that Doom may not fully utilize all 16 threads, which is typical for games of its era.

How This Combo Ranks

This combination of AMD Ryzen 7 5700G and NVIDIA GeForce RTX 5090 D ranks 97th out of 2930 tested combos in Doom, placing it in the top 3.3% of all configurations evaluated. This ranking reflects the GPU's dominance in a game that is primarily graphics-bound, while the CPU's mid-range performance does not significantly hamper the overall experience.

The rank is particularly impressive when considering that the CPU sits in the 79th percentile while the GPU sits in the 92nd percentile. The combination outperforms what either component's individual percentile might suggest, indicating that Doom's workload favors the GPU's strengths and does not heavily penalize the CPU's relative weaknesses. The 97th rank out of 2930 combos means the system outperforms the vast majority of tested configurations, including many with more powerful CPUs paired with less capable GPUs.

The delta between the CPU's 79th percentile and the combo's 97th rank out of 2930 (which corresponds to roughly the 96.7th percentile) shows that the GPU is doing the heavy lifting in this pairing. The RTX 5090 D's raw throughput allows the system to achieve frame rates that would typically require a more balanced high-end CPU. However, the ranking also implies that there are 96 combos that perform better, likely featuring both top-tier CPUs and this same GPU or its peers.

For context, the CPU's nearest rivals in synthetic benchmarks — the Intel Core i9-9900K at -0.2% and the AMD Ryzen AI 7 445 at +0.4% — would likely produce similar combo rankings when paired with the same GPU. The performance difference between these processors is within noise, and Doom's engine does not appear to reward one architecture over another in a meaningful way.

Measured FPS Breakdown

The measured frame rates across all resolutions and settings reveal a system that delivers exceptional performance at every configuration. At 1920x1080, the average frame rates range from 287 FPS at Ultra to 344 FPS at Low, with Medium at 328 FPS and High at 309 FPS. The Medium preset shows a minimum of 279 FPS and a maximum of 377 FPS, indicating some frame time variance but no drops below the refresh rate of most high-end monitors.

At 2560x1440, the system maintains high performance with averages of 189 FPS at Ultra, 231 FPS at High, 273 FPS at Medium, and 297 FPS at Low. The Medium preset at this resolution shows a minimum of 232 FPS and a maximum of 314 FPS, demonstrating that even the lowest frame rates remain well above 144 Hz thresholds. The gap between Low and Ultra at 1440p is 108 FPS, showing that settings have a substantial impact on performance at this resolution.

At 3840x2160, the system delivers 102 FPS at Ultra, 125 FPS at High, 148 FPS at Medium, and 170 FPS at Low. The Medium preset at 4K shows a minimum of 126 FPS and a maximum of 170 FPS, which means even the worst-case frame rate stays above 120 FPS. The 68 FPS spread between Low and Ultra at 4K is proportionally similar to the spread at 1440p, confirming that the GPU handles settings scaling consistently across resolutions.

The data shows a clear pattern: each resolution step down from 4K to 1440p yields roughly 80-100 FPS improvement at most settings, while the step from 1440p to 1080p yields 40-80 FPS improvement depending on the preset. This asymmetry is most pronounced at Low settings, where the 4K-to-1440p jump is 127 FPS but the 1440p-to-1080p jump is only 47 FPS. This reinforces the conclusion that the CPU becomes a more significant factor at lower resolutions, particularly with less demanding graphics settings.

Settings Recommendations

For 4K gaming, the High preset at 125 FPS average represents the best balance of visual quality and performance. Ultra at 102 FPS is playable but offers diminishing returns over High, while Medium at 148 FPS sacrifices visual fidelity for a modest frame rate gain that most users won't notice on a 120Hz display. Low at 170 FPS is unnecessary at this resolution given the GPU's capabilities, as the visual downgrade is significant and the frame rate improvement over High is 45 FPS but unlikely to be perceptually meaningful on typical 4K displays.

At 1440p, the High preset at 231 FPS is the standout recommendation for users with high refresh rate monitors. This delivers excellent visual quality while maintaining frame rates well above 200 FPS. Ultra at 189 FPS is also viable for those who prioritize visual fidelity, as it remains above 144 FPS. Medium at 273 FPS and Low at 297 FPS offer marginal benefits for competitive play, and the 66 FPS difference between High and Low may be worth considering for esports-focused users with 240Hz or 360Hz displays.

At 1080p, the Medium preset at 328 FPS with a minimum of 279 FPS and maximum of 377 FPS is the optimal choice for most users. This provides a significant frame rate advantage over High at 309 FPS and Ultra at 287 FPS while maintaining better visual quality than Low at 344 FPS. The 16 FPS gap between Medium and Low is negligible, making Low an unnecessary compromise. Ultra at 287 FPS remains perfectly playable, but the 41 FPS deficit compared to Medium is not justified by the visual improvements at this resolution.

Across all resolutions, the Medium preset consistently offers the best frame rate-to-quality ratio, with the data showing that the jump from Medium to High costs roughly 15-20% performance while the jump from High to Ultra costs another 15-20%. For users with variable refresh rate monitors, any of these presets will provide a smooth experience, but the measured minimums indicate that Medium is the safest choice to avoid any frame time spikes, particularly at 4K where the minimum of 126 FPS still exceeds 120Hz but leaves less headroom.