Doom

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

The measured FPS data for Doom reveals a steep, predictable decline as resolution climbs, but the shape of that curve carries important information about where the bottleneck sits. At 1080p with Low settings, the combo of AMD Ryzen 7 5800XT and AMD Radeon RX 6600 XT delivers 192.1 FPS. Jumping to 1440p drops that to 126.7 FPS, a reduction of roughly 34%. Pushing further to 4K brings the average down to 69.3 FPS, which is about 45% lower than the 1440p result and 64% lower than the 1080p figure. This is not a linear scaling pattern; the percentage losses accelerate as resolution increases, which is the classic signature of a GPU-bound scenario at higher pixel counts.

Looking at the Ultra preset, the same trend appears but with more dramatic absolute losses. At 1080p Ultra, the system hits 115.2 FPS. At 1440p Ultra, that falls to 74 FPS, a 36% drop. At 4K Ultra, the average plummets to 43 FPS, which is 42% below the 1440p number and 63% below 1080p. The consistency of these percentage drops across settings — roughly one-third lost when moving from 1080p to 1440p, and another one-third to one-half lost when moving to 4K — suggests that the rendering workload scales almost entirely with pixel count. The CPU, with its 8 cores and 16 threads, is not the limiting factor here; if it were, the FPS would flatten out at higher resolutions rather than continuing to drop sharply.

What does this imply for the user? The data shows a system that can comfortably handle 1080p and 1440p gaming in Doom, but 4K pushes the GPU to its limits. The RX 6600 XT, with its 8 GB of GDDR6 memory and 256.0 GB/s bandwidth, appears to be the primary constraint at 4K. The fact that even Low settings at 4K only reach 69.3 FPS — below the 1440p High result of 92.4 FPS — underscores that the GPU's raw throughput, not the CPU's processing power, dictates performance at that resolution. This is a clear case where the CPU has headroom to spare, and the GPU becomes the wall.

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

The measured rows provide a clear hierarchy of performance across four presets at each resolution. At 1080p, the jump from Medium to High is relatively modest (169.9 to 140 FPS, a 21% drop), while the jump from High to Ultra is steeper (140 to 115.2 FPS, an 18% drop). The Low preset at 192.1 FPS offers the highest headroom, but the question is whether the visual trade-off is worth it. For a fast-paced FPS like Doom, the data suggests High is the sweet spot at 1080p: it stays well above the 100 FPS threshold that most players consider smooth, while presumably retaining significantly better visual fidelity than Low or Medium.

At 1440p, the recommendation shifts. Medium delivers 107.8 FPS, which is still comfortably above 60 FPS and close to the 1080p High result. High drops to 92.4 FPS, still playable but starting to approach the lower end of high-refresh territory. Ultra at 74 FPS is acceptable for slower moments but may feel less responsive during intense combat sequences. The data indicates that Medium at 1440p offers the best balance: it loses only 15% compared to Low (126.7 FPS) while likely providing a substantial visual upgrade over the lowest preset.

At 4K, the choices become more constrained. Low at 69.3 FPS is the only preset that clears the 60 FPS bar, and even that is marginal. Medium at 60.7 FPS is technically playable but leaves little room for frame-time spikes. High at 51.9 FPS and Ultra at 43 FPS fall below the 60 FPS threshold that many consider the minimum for a smooth experience. The data implies that if 4K is the target, the user must accept Low or Medium settings, and even then, the experience will be less fluid than at lower resolutions. For most players, the measured results suggest sticking to 1440p with Medium or High, where the combo delivers a much more comfortable margin.

How This Combo Ranks — use comboRankInGame vs other tested combos

The combination of AMD Ryzen 7 5800XT and AMD Radeon RX 6600 XT ranks 1149 out of 1681 tested combos in Doom. That places it in the 68th percentile of all tested systems, meaning roughly one-third of tested combos perform worse, and two-thirds perform better. This is a mid-pack result for a game that is known to scale well with both CPU and GPU horsepower. The rank suggests that while this combo is far from the top, it is also not a weak performer; it sits squarely in the upper-middle range of the database.

The CPU's individual benchmark percentile is higher than the combo's overall rank. The Ryzen 7 5800XT scores in the 86th percentile against all CPUs, with an average benchmark score of 29774. Its nearest rivals include the AMD Ryzen 7 PRO 5755GE (deltaPct 0.1), the AMD Ryzen 7 6800HS (deltaPct -0.3), and the AMD Ryzen AI 7 PRO 360 (deltaPct 0.3). The GPU, meanwhile, sits in the 71st percentile against all GPUs, with an average benchmark score of 27985. Its nearest rivals include the NVIDIA GeForce GTX 980 Ti (deltaPct 0.1) and the NVIDIA GeForce RTX 3070 (deltaPct -0.9). The fact that the combo ranks lower than either component's individual percentile suggests that the GPU is dragging the overall result down relative to what the CPU could support. In a game like Doom, which is not particularly CPU-heavy, the GPU's mid-range standing becomes the limiting factor.

The deltaPct values for both components are tight, within 0.3% of their nearest rivals. This indicates that the 5800XT and RX 6600 XT are closely matched to their immediate competitors, and small variations in game-specific optimization could shift the ranking. The combo's 1149th place out of 1681 is consistent with a system where the GPU is a mid-tier part and the CPU is a high-tier part; the overall score reflects a compromise between the two.

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

At 1920x1080, the measured averages are as follows: Low settings produce 192.1 FPS, Medium produces 169.9 FPS, High produces 140 FPS, and Ultra produces 115.2 FPS. The spread from Low to Ultra is 76.9 FPS, indicating that the settings slider has a substantial impact on performance at this resolution. The gap between Low and Medium is 22.2 FPS, between Medium and High is 29.9 FPS, and between High and Ultra is 24.8 FPS. These gaps are relatively uniform, suggesting that each preset tier adds a similar computational burden.

At 2560x1440, the averages are: Low at 126.7 FPS, Medium at 107.8 FPS, High at 92.4 FPS, and Ultra at 74 FPS. The spread from Low to Ultra is 52.7 FPS, which is smaller in absolute terms than at 1080p but proportionally similar. The gaps between presets are 18.9 FPS (Low to Medium), 15.4 FPS (Medium to High), and 18.4 FPS (High to Ultra). The consistency of these gaps reinforces the idea that the GPU's workload scales predictably with both resolution and settings.

At 3840x2160, the averages are: Low at 69.3 FPS, Medium at 60.7 FPS, High at 51.9 FPS, and Ultra at 43 FPS. The spread from Low to Ultra is 26.3 FPS, and the gaps are 8.6 FPS (Low to Medium), 8.8 FPS (Medium to High), and 8.9 FPS (High to Ultra). The near-uniform gaps at 4K — each preset costing roughly 9 FPS — suggest that the GPU is so heavily loaded that each additional tier of visual fidelity extracts a nearly fixed toll. This is different from the 1080p and 1440p results, where the gaps varied more, indicating that at lower resolutions the CPU or other factors may occasionally intervene.

Comparing across resolutions, the 1080p Low result of 192.1 FPS is 1.5 times the 1440p Low result and 2.8 times the 4K Low result. The 1080p Ultra result of 115.2 FPS is 1.6 times the 1440p Ultra result and 2.7 times the 4K Ultra result. These ratios are consistent with a purely pixel-bound workload, where doubling the pixel count roughly halves the frame rate.

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

The AMD Radeon RX 6600 XT is built on the RDNA 2.0 architecture with a Navi 23 chip, manufactured on a 7 nm process by TSMC. It carries 8 GB of GDDR6 memory on a 128-bit bus, providing a memory bandwidth of 256.0 GB/s. The GPU has a base clock of 1968 MHz, a game clock of 2359 MHz, and a boost clock of 2589 MHz. Its memory runs at 2000 MHz, which translates to 16 Gbps effective. The card has 2048 shading units, 128 TMUs, and 64 ROPs, along with 32 ray accelerators. Its pixel rate is 165.7 GPixel/s, and its texture rate is 331.4 GTexel/s. The FP32 performance is 10.60 TFLOPS.

In Doom, the data shows that the GPU's capabilities are well-matched to 1080p and 1440p but insufficient for 4K at high settings. The 8 GB VRAM is likely sufficient for this game, which was released in 2016 and does not have the massive texture requirements of modern titles. However, the memory bandwidth of 256.0 GB/s becomes a limiting factor at 4K, where the GPU must push four times as many pixels as at 1080p. The boost clock of 2589 MHz is respectable, but the card's overall throughput — reflected in its 71st percentile ranking among all GPUs — places it firmly in the mid-range.

The GPU's nearest rivals include the NVIDIA GeForce GTX 980 Ti, which is only 0.1% ahead in average benchmark score, and the AMD Radeon R9 M395X, which is 0.4% behind. The NVIDIA GeForce RTX 3070 is 0.9% behind, which is interesting because the RTX 3070 is generally considered a higher-tier card. This suggests that the RX 6600 XT's benchmark scores are competitive with a wide range of GPUs, and its performance in Doom is consistent with its overall standing. The fact that the GPU's percentile (71) is lower than the CPU's (86) directly explains why the combo's overall rank (1149 out of 1681) is lower than the CPU's individual standing.

FAQ

Q: What is the highest average FPS this combo achieves in Doom?

A: The highest measured average is 192.1 FPS, achieved at 1920x1080 with Low settings.

Q: Can this combo run Doom at 4K with playable frame rates?

A: At 4K, only Low settings (69.3 FPS) and Medium settings (60.7 FPS) exceed 60 FPS. High (51.9 FPS) and Ultra (43 FPS) fall below that threshold.

Q: How does the CPU's benchmark ranking compare to the combo's in-game rank?

A: The Ryzen 7 5800XT ranks in the 86th percentile among all CPUs, while the combo ranks 1149 out of 1681 (roughly 68th percentile) in Doom.

Q: What is the FPS difference between Low and Ultra settings at 1440p?

A: At 2560x1440, Low produces 126.7 FPS and Ultra produces 74 FPS, a difference of 52.7 FPS.

Q: Which GPU is the closest rival to the RX 6600 XT in benchmark scores?

A: The NVIDIA GeForce GTX 980 Ti is the closest, with a deltaPct of 0.1 (meaning it is 0.1% faster in average benchmark score).

Q: Does the data suggest the CPU or GPU is the bottleneck at 1080p?

A: At 1080p Low, the combo hits 192.1 FPS, which is high enough that the CPU's 8-core, 16-thread configuration is likely sufficient. The GPU becomes the limiting factor at higher resolutions and settings.

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

The AMD Ryzen 7 5800XT is a Zen 3 (Vermeer) processor with 8 cores and 16 threads, running at a base clock of 3.80 GHz and a boost clock of 4.80 GHz. It has 64 KB of L1 cache per core, 512 KB of L2 cache per core, and a 32 MB L3 cache. The CPU supports DDR4 memory in a dual-channel configuration with a bandwidth of 51.2 GB/s, and it connects via PCIe Gen 4 with 20 lanes. Its TDP is 105 W, and it fits in the AMD Socket AM4. The chip is manufactured on a 7 nm process by TSMC, with 4,150 million transistors on a 74 mm² die.

In Doom, the CPU's role is secondary to the GPU at higher resolutions, but it still matters at 1080p. The measured FPS at 1080p Low (192.1) and Medium (169.9) are high enough that the CPU's single-thread performance — evidenced by a 3dmark single-thread score of 959 and a Cinebench R23 single-core score of 3359 — is likely sufficient to feed the GPU without creating a bottleneck. The CPU's multi-threaded scores, such as a Cinebench R23 multi-core score of 23794 and a Passmark multi-thread score of 27988, indicate that it has ample headroom for any background tasks or game logic that might be present.

The CPU's nearest rivals in benchmark scores are all within 0.3% in either direction: the AMD Ryzen 7 PRO 5755GE (deltaPct 0.1), the AMD Ryzen 7 6800HS (deltaPct -0.3), and the AMD Ryzen AI 7 PRO 360 (deltaPct 0.3). This tight clustering suggests that the 5800XT's performance is very consistent with other high-end Ryzen 7 parts. In Doom, the data shows that the CPU is not the limiting factor — the combo's rank is dragged down by the GPU, not the processor. The 86th percentile CPU ranking versus the 71st percentile GPU ranking makes this clear. If the GPU were upgraded, the combo's in-game rank would likely improve significantly, as the CPU has demonstrated it can push frame rates well above what the RX 6600 XT can deliver at 4K.