Doom

The AMD Ryzen 7 5700X and AMD Radeon RX 7800 XT pairing in Doom (2016) demonstrates a classic case of resolution-dependent bottlenecking. The data reveals a system that is overwhelmingly GPU-limited at higher resolutions, while the CPU’s strong multi-threaded performance ensures the frame rate ceiling is rarely a concern. This analysis breaks down the measured FPS across all settings and resolutions, interprets the component roles, and contextualizes the combo’s standing among 1,681 tested configurations.

Resolution Scaling

The FPS drop from 1080p to 4K in Doom is steep and consistent, clearly indicating that the Radeon RX 7800 XT becomes the limiting factor as pixel count rises. At Low settings, the average frame rate falls from 279.6 FPS at 1920x1080 to 181.3 FPS at 2560x1440, and finally to 101.1 FPS at 3840x2160. This represents a 64% reduction in frame rate from the lowest to the highest resolution. The pattern holds across all presets, with the Ultra preset exhibiting the most severe scaling: 166.6 FPS at 1080p, 111.5 FPS at 1440p, and 59.5 FPS at 4K.

The scaling factor between 1440p and 4K is particularly telling. For High settings, the drop is from 135.7 FPS to 73.1 FPS, a 46% decrease. This substantial penalty suggests the GPU is hitting memory bandwidth or shading unit limits, rather than any CPU constraint. The RX 7800 XT’s 624.1 GB/s of memory bandwidth and 37.32 TFLOPS of FP32 compute are being saturated by the 8.3 million pixels in 4K, whereas the 2.1 million pixels in 1080p leave the GPU with ample headroom.

At 1080p, the data implies the CPU may begin to matter more, though the Ryzen 7 5700X’s specifications suggest it holds up well. The gap between Low (279.6 FPS) and Ultra (166.6 FPS) at 1080p is 113 FPS, which is a larger absolute difference than the 59.5 FPS gap at 4K. This indicates that at lower resolutions, the GPU has enough spare capacity to render more complex effects without a proportional frame rate penalty, while at 4K, every additional effect directly reduces output. The conclusion is clear: this combo is balanced for high-refresh 1440p gaming, but 4K Ultra will push the GPU to its absolute limit.

CPU Role

The Ryzen 7 5700X brings 8 cores and 16 threads based on the Zen 3 architecture, with a base clock of 3.40 GHz and a boost clock of 4.60 GHz. In Doom, a game from 2016, this processor is unlikely to be the bottleneck at any resolution, given its strong multi-threaded score of 22,620 in Cinebench R23. The data supports this: the frame rate drops are almost entirely attributable to resolution changes, not settings complexity, which would be the case if the CPU were struggling.

The CPU’s 32 MB of shared L3 cache and dual-channel DDR4 memory support with 51.2 GB/s bandwidth are more than sufficient for Doom’s engine. Its single-thread performance, evidenced by a 3,193 score in Cinebench R23 single-core, ensures that even at 1080p Low where the GPU is rendering frames at 279.6 FPS, the processor can keep up with the draw calls and game logic. The 16 threads are largely idle, as Doom from this era rarely scales beyond 8 threads, but the high per-core performance is what matters here.

Comparing to the nearest rivals, the Ryzen 7 5700X’s average benchmark score of 26,214 is effectively identical to the Intel Core i9-11900KF (26,196, delta 0.1%) and the AMD Ryzen 5 7600X (26,272, delta -0.2%). This means that swapping in a newer or older CPU would yield negligible differences in Doom’s frame rates, as the GPU is the primary constraint. The 65W TDP also indicates the CPU runs cool and efficient, leaving thermal headroom for sustained boost clocks during long gaming sessions, though the exact impact on frame rates is not measured in this data.

Settings Recommendations

The measured data suggests that the High preset offers the best balance of visual quality and performance for this combo, particularly at 1440p. At 2560x1440 High, the system achieves 135.7 FPS, which is above the 120Hz threshold for most high-refresh monitors. Dropping to Medium yields 158.6 FPS, a 17% improvement, but the visual fidelity loss is likely not worth it given the High preset already provides a smooth experience. At 4K, High produces 73.1 FPS, which is playable but not ideal for competitive play; Medium (84.9 FPS) is a better choice for 4K if the user prioritizes frame rate over shadows and textures.

Ultra is only viable at 1080p, where it hits 166.6 FPS. At 1440p, Ultra drops to 111.5 FPS, which is acceptable for slower-paced games but may feel less responsive in Doom’s fast combat. The Low preset is interesting: it yields 279.6 FPS at 1080p and 181.3 FPS at 1440p, but the visual compromise is severe. For esports-style play, Low at 1440p is the competitive choice; for immersive single-player, High at 1440p is the sweet spot. The data shows that High at 1440p is 22% faster than Ultra at the same resolution, making it the recommended preset for the majority of users.

FAQ

Q: What is the maximum average FPS this combo can achieve in Doom?

A: The highest measured average is 279.6 FPS, achieved at 1920x1080 with Low settings.

Q: Is this combo capable of 4K gaming at 60 FPS?

A: Yes, but only on Medium settings, which averages 84.9 FPS at 3840x2160. High settings average 73.1 FPS, while Ultra drops to 59.5 FPS.

Q: How does the CPU compare to its closest rival?

A: The Ryzen 7 5700X scores 26,214 in average benchmarks, which is 0.1% higher than the Intel Core i9-11900KF (26,196) and 0.2% lower than the AMD Ryzen 5 7600X (26,272). The differences are negligible.

Q: What is the largest FPS drop between resolutions?

A: The largest drop is from 1080p Low (279.6 FPS) to 4K Low (101.1 FPS), a 178.5 FPS reduction, representing a 64% decrease.

Q: Does the Ultra preset ever exceed 120 FPS?

A: Yes, at 1920x1080 Ultra, the average is 166.6 FPS. At 2560x1440 Ultra, it drops to 111.5 FPS, which is below the 120 FPS threshold.

Q: What is the GPU’s percentile ranking among all GPUs?

A: The Radeon RX 7800 XT ranks in the 76th percentile of all GPUs, with an average benchmark score of 32,619.

GPU Role

The Radeon RX 7800 XT is the dominant component in this pairing, as evidenced by the resolution scaling data. With 16 GB of GDDR6 memory on a 256-bit bus delivering 624.1 GB/s of bandwidth, the GPU has ample resources for Doom’s textures and effects. The boost clock of 2430 MHz and the game clock of 2124 MHz ensure high sustained performance, while the 3840 shading units and 96 ROPs handle the rasterization workload.

The GPU’s 76th percentile ranking among all GPUs, with an average score of 32,619, places it in the upper tier. Its nearest rival, the AMD FirePro S9300 X2, scores 32,540 (delta 0.2%), while the NVIDIA P104-100 scores 32,747 (delta -0.4%). These deltas are within 1%, meaning the RX 7800 XT’s performance is consistent with its class. In Doom specifically, the GPU is the sole reason for frame rate variance across resolutions. At 4K Ultra, the 59.5 FPS average suggests the 37.32 TFLOPS of FP32 compute is being fully utilized, while at 1080p Low, the GPU is likely idling, waiting for the CPU to submit frames.

The 263W TDP and dual 8-pin power connectors indicate a power-hungry card, but the data does not reveal thermal throttling behavior. The 16 GB VRAM is more than enough for Doom, which was released in 2016 and designed for GPUs with a fraction of this memory. The GPU’s DirectX 12 Ultimate support and Vulkan 1.4 API compatibility mean it runs the game’s modern rendering paths efficiently, but the fundamental limit is the fill rate and shading throughput at high resolutions.

Measured FPS Breakdown

At 1920x1080, the full range of settings shows the GPU’s headroom. Low averages 279.6 FPS, Medium 242.8 FPS, High 205.1 FPS, and Ultra 166.6 FPS. The step from Low to Ultra is a 40% reduction, indicating that each preset adds meaningful load. At 2560x1440, the averages are 181.3 FPS (Low), 158.6 FPS (Medium), 135.7 FPS (High), and 111.5 FPS (Ultra). The relative gap between Low and Ultra narrows to 38%, suggesting the GPU is becoming the primary constraint. At 3840x2160, the averages are 101.1 FPS (Low), 84.9 FPS (Medium), 73.1 FPS (High), and 59.5 FPS (Ultra). The gap between Low and Ultra is now 41%, nearly identical to 1080p, but the absolute numbers are much lower.

The most interesting data point is the 4K Ultra result of 59.5 FPS. This is the only measured configuration below 60 FPS, and it represents the absolute worst-case scenario for this combo. The 4K Medium result of 84.9 FPS is 43% higher than Ultra, making Medium the sensible choice for 4K displays. Across all resolutions, the High preset consistently offers a 20-30% improvement over Ultra, reinforcing its status as the optimal quality-to-performance ratio.

How This Combo Ranks

The AMD Ryzen 7 5700X + AMD Radeon RX 7800 XT combo ranks 638th out of 1,681 tested combinations in Doom, placing it in the top 38% of all configurations. This is a strong showing, considering the CPU is a mid-range 2022 release and the GPU is a high-end 2023 model. The rank reflects the GPU’s 76th percentile performance and the CPU’s 83rd percentile among all CPUs, meaning the pairing is well-matched.

The combo’s rank is likely held back by the 4K results, where the GPU struggles to maintain high frame rates on Ultra settings. At 1080p and 1440p, the combo would rank significantly higher, as the frame rates are in the top tier for those resolutions. The delta between this combo and the top-ranked systems is not provided, but the rank of 638 out of 1,681 suggests there are 637 combinations with higher average FPS, likely featuring more powerful GPUs like the RTX 4090 or RX 7900 XTX. For a 1440p high-refresh gaming target, this combo is excellent; for 4K Ultra, it is merely adequate. The data implies that users should prioritize resolution and preset selection to maximize the combo’s potential, as the hardware itself is balanced for 1440p High/Ultra gaming.