Doom

# Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data for Doom with the AMD Ryzen 7 5800XT and AMD Radeon RX 7900 XT reveals a clear narrative about where the performance ceiling sits. At 1080p with Low settings, the combo achieves 341.1 FPS, but by the time resolution climbs to 4K Ultra, that figure collapses to 70.7 FPS. The drop from 1080p Low to 4K Low is steep — from 341.1 down to 120.9 FPS — a reduction of roughly 65% of the original framerate. This pattern strongly suggests the GPU becomes the primary bottleneck as pixel count rises.

Looking at the scaling more carefully, the 1440p results sit comfortably between the 1080p and 4K extremes. At 1440p Low, the combo delivers 216.4 FPS, which is 63% of the 1080p Low score. Moving to 4K Low, that percentage drops to 35% of the 1080p baseline. The relationship is not linear; the framerate loss accelerates at higher resolutions, which is typical for a GPU-bound scenario where memory bandwidth and shading throughput are stretched.

The Ultra preset tells a similar story with even more pronounced degradation. From 203 FPS at 1080p Ultra to 134.6 FPS at 1440p Ultra, then down to 70.7 FPS at 4K Ultra. The 4K Ultra result is just 35% of the 1080p Ultra number, matching the Low preset's scaling ratio. This consistency across presets implies that resolution, not settings, is the dominant factor determining performance here. The data suggests that at 1080p, the CPU may still be contributing to the ceiling, but at 4K, the RX 7900 XT's compute resources are clearly the limiting component.

# How This Combo Ranks — use comboRankInGame vs other tested combos

Among the 1,681 tested CPU-GPU combinations in Doom, this pairing of the AMD Ryzen 7 5800XT with the AMD Radeon RX 7900 XT ranks 354th. That places it in the top 21% of all combos tested for this game, which is a solid position given the game's age and the hardware's specifications. The rank is surprisingly modest for a GPU that sits at the 82nd percentile among all GPUs and a CPU at the 86th percentile among all CPUs. This discrepancy hints that Doom's engine may not fully leverage the RX 7900 XT's capabilities, or that other combinations with faster memory or newer architectures simply pull ahead.

The combo's rank relative to its component percentiles suggests that pairing a high-end GPU with a mid-range CPU from the 5000 series does not automatically yield top-tier game performance. The Ryzen 7 5800XT's nearest rivals in CPU benchmarks include the AMD Ryzen 7 PRO 5755GE (0.1% higher average score), the AMD Ryzen 7 6800HS (0.3% lower), the AMD Ryzen AI 7 PRO 360 (0.3% higher), and the AMD Ryzen 7 7840H (0.3% lower). These are all comparable in raw compute, but their game performance could vary due to memory support and platform differences. On the GPU side, the RX 7900 XT's nearest rivals are the NVIDIA GeForce RTX 5080 Mobile (0% delta), NVIDIA CMP 70HX (0.3% higher), NVIDIA GeForce MX570 (0.4% lower), and NVIDIA GeForce RTX 4080 Mobile (0.6% higher). The fact that mobile GPUs appear as close rivals in synthetic benchmarks, yet the desktop RX 7900 XT only manages rank 354, suggests Doom's engine may favor certain driver optimizations or architectural traits that the RDNA 3.0 design does not fully exploit.

# GPU Role — VRAM, clocks, and how they relate to this game's results

The AMD Radeon RX 7900 XT brings substantial hardware to Doom: 20 GB of GDDR6 memory on a 320-bit bus, delivering 800.0 GB/s of bandwidth. The GPU's boost clock reaches 2394 MHz, with a game clock of 2025 MHz and a base clock of 1387 MHz. With 5376 shading units, 336 texture mapping units, and 192 render output units, the card is well-equipped for high-resolution rasterization. The FP32 throughput of 51.48 TFLOPS provides ample compute headroom, yet the measured FPS data shows that even this firepower is not enough to maintain high framerates at 4K Ultra.

The memory configuration is particularly relevant for Doom's performance at higher resolutions. The 20 GB VRAM is far more than this game requires, so capacity is not a limiting factor. However, the 800.0 GB/s bandwidth is crucial for feeding the GPU at 4K, where texture fetches and framebuffer operations multiply. The pixel rate of 459.6 GPixel/s and texture rate of 804.4 GTexel/s suggest the card can theoretically handle the load, but the measured 70.7 FPS at 4K Ultra indicates that the engine's rendering path is not perfectly aligned with the RDNA 3.0 architecture. The 84 ray tracing cores are present but Doom (2016) does not use ray tracing, so they sit idle, further suggesting that raw rasterization performance is what matters here.

# Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

At 1920x1080, the combo delivers 341.1 FPS on Low, 295.7 FPS on Medium, 247.5 FPS on High, and 203 FPS on Ultra. The step from Low to Medium costs 45.4 FPS, from Medium to High costs 48.2 FPS, and from High to Ultra costs 44.5 FPS. These are relatively uniform drops, indicating that each preset tier imposes a similar additional workload on the GPU. At 1080p, even Ultra settings keep the framerate above 200 FPS, which is far beyond what most displays can show.

Moving to 2560x1440, the results are 216.4 FPS on Low, 192.8 FPS on Medium, 160.3 FPS on High, and 134.6 FPS on Ultra. The gap between Low and Medium narrows to 23.6 FPS, while Medium to High costs 32.5 FPS, and High to Ultra costs 25.7 FPS. The pattern here is less uniform than at 1080p, suggesting that the GPU is starting to feel the pressure of increased pixel count. At 1440p Ultra, the framerate drops below 135 FPS, which is still high but begins to approach the refresh rate limits of many gaming monitors.

At 3840x2160, the framerates are 120.9 FPS on Low, 100.9 FPS on Medium, 88.1 FPS on High, and 70.7 FPS on Ultra. The Low to Medium drop is 20 FPS, Medium to High is 12.8 FPS, and High to Ultra is 17.4 FPS. The 4K results show that Low settings can maintain 120 FPS, but Ultra settings push the GPU to its limits. The difference between 1080p Low and 4K Low is 220.2 FPS, while the difference between 1080p Ultra and 4K Ultra is 132.3 FPS. This asymmetry highlights that the Ultra preset's additional effects scale more aggressively with resolution.

# Settings Recommendations — which preset gives the best experience per the measured rows

For a 1080p display, the data supports using Ultra settings without any practical compromise. At 203 FPS, the combo is delivering more than enough performance for any high-refresh-rate monitor, and the visual benefits of Ultra are free in practice. Even at 1440p, Ultra settings at 134.6 FPS remain viable for most gaming scenarios, though users with 144 Hz or 165 Hz displays might prefer High settings at 160.3 FPS to stay above their refresh ceiling.

At 4K, the choice becomes more nuanced. Ultra settings at 70.7 FPS are playable for a single-player FPS but may not satisfy competitive players. High settings at 88.1 FPS offer a 25% improvement over Ultra while still looking excellent, and Medium at 100.9 FPS provides another 15% boost. For players targeting 120 FPS at 4K, Low settings at 120.9 FPS are the only option that reaches that threshold. The data suggests that High is the sweet spot for 4K, balancing visual quality with a framerate that clears 85 FPS. Medium settings offer a safer margin for demanding scenes, though the measured data does not include minimum framerates, so the average figures should be interpreted with some caution.

# CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 7 5800XT is an 8-core, 16-thread processor based on the Zen 3 architecture, codenamed Vermeer. It boosts up to 4.80 GHz from a base clock of 3.80 GHz, with a 32 MB L3 cache. The CPU's benchmark scores, such as 23,794 in Cinebench R23 multi-core and 3,359 in single-core, position it as a strong performer for gaming workloads. In Doom, which is known for being GPU-bound at high settings, the CPU's role is primarily to feed the GPU with draw calls and game logic at high framerates.

The data indicates that at 1080p Low, where the GPU has the least work, the CPU may be a limiting factor. The 341.1 FPS result is extraordinarily high, and pushing beyond that would require a faster CPU to issue commands faster. However, the CPU's single-thread performance, as shown by the 959 score in 3DMark single-thread and 3,538 in Passmark single-thread, is respectable but not class-leading. The nearest rivals in CPU benchmarks, such as the AMD Ryzen 7 6800HS and AMD Ryzen 7 7840H, have similar average scores, suggesting that the 5800XT is well-matched to its competition in synthetic tests.

The CPU's 105 W TDP and dual-channel DDR4 memory support with 51.2 GB/s bandwidth are adequate for Doom, which does not heavily stress memory bandwidth. The fact that the combo ranks 354th out of 1,681 suggests that the CPU is not the primary constraint; otherwise, we would expect a higher rank given the GPU's capabilities. The 16 threads are more than Doom requires, so the game likely uses only a few cores, and the high boost clock of 4.80 GHz ensures strong single-threaded performance where it matters.

# FAQ

Q: What is the highest average framerate measured for this combo in Doom?

A: The highest measured average FPS is 341.1, achieved at 1920x1080 resolution with Low settings.

Q: How does the combo rank among all tested configurations in Doom?

A: The AMD Ryzen 7 5800XT with AMD Radeon RX 7900 XT ranks 354th out of 1,681 tested combos, placing it in the top 21% of all configurations.

Q: What is the performance difference between 1080p Ultra and 4K Ultra?

A: At 1080p Ultra, the combo delivers 203 FPS, while at 4K Ultra it drops to 70.7 FPS, a reduction of 132.3 FPS or approximately 65% of the original framerate.

Q: Which settings preset at 1440p provides the best balance of quality and performance?

A: The data shows 1440p High at 160.3 FPS and 1440p Ultra at 134.6 FPS. High settings provide a 25.7 FPS advantage over Ultra while still maintaining high framerates.

Q: Does the RX 7900 XT's 20 GB VRAM affect Doom's performance?

A: The 20 GB VRAM capacity is not a limiting factor for Doom, as the game does not require that much memory. The GPU's 800.0 GB/s bandwidth and compute resources are more relevant to the measured results.

Q: Is the Ryzen 7 5800XT a bottleneck for this game at any resolution?

A: The data suggests the CPU may contribute to the ceiling at 1080p Low (341.1 FPS), where the GPU has minimal work, but at 4K the GPU becomes the clear limiting component, as evidenced by the framerate scaling with resolution.