Doom

The AMD Ryzen 7 5800XT paired with the AMD Radeon RX 6750 XT delivers a robust 1080p experience in Doom, but the data reveals a clear shift in bottleneck behavior as resolution climbs. The measured frames per second (FPS) across the four settings tiers at three resolutions paint a picture of a system that is well-balanced at lower resolutions, yet progressively leans on the GPU’s capabilities at 4K. This analysis breaks down the measured results, contextualizes them against the component’s synthetic benchmarks, and explores what the numbers imply for optimal settings.

Resolution Scaling

The FPS drop from 1080p to 4K is substantial, indicating that the Radeon RX 6750 XT becomes the primary limiting factor at higher resolutions. At Low settings, the average frame rate falls from 242.2 FPS at 1920x1080 to 153.4 FPS at 2560x1440, a reduction of 88.8 FPS, and then further down to 84.3 FPS at 3840x2160. This pattern—a 36.7% drop from 1080p to 1440p and a further 45.0% drop from 1440p to 4K—shows that the GPU’s pixel-pushing capabilities are being taxed heavily. The scaling is not linear; the 4K Low result is roughly one-third of the 1080p Low result, which strongly suggests that the GPU’s fill rate and memory bandwidth are the constraining resources.

The scaling behavior shifts when settings are raised. At Ultra settings, the 1080p average is 146.3 FPS, which drops to 97.1 FPS at 1440p and then to 50.9 FPS at 4K. The 4K Ultra result is just 34.8% of the 1080p Ultra result, a more severe proportional decline than what is seen at Low. This implies that the combination of higher resolution and more demanding graphical features—likely tied to the GPU’s RDNA 2.0 architecture and its 12 GB of GDDR6 memory—saturates the hardware quickly. The data suggests that the CPU, with its 8 cores and 16 threads, has ample headroom at 4K, as the FPS is primarily governed by the GPU’s rendering speed rather than by processor throughput.

FAQ

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

A: The highest average FPS is 242.2, achieved at 1920x1080 resolution with Low settings. This is followed closely by 209 FPS at Medium settings and 175.8 FPS at High settings for the same resolution.

Q: How does the 4K Ultra performance compare to the 1080p Low performance?

A: The 4K Ultra average of 50.9 FPS is roughly one-fifth of the 1080p Low average of 242.2 FPS. This stark difference highlights the massive performance cost of combining maximum resolution with maximum graphical fidelity.

Q: Is the GPU or CPU more likely to be the bottleneck at 1440p High settings?

A: Given that the 1440p High average is 116.4 FPS, and considering the GPU’s benchmark percentile of 79 versus the CPU’s percentile of 86, the data suggests the GPU is the limiting factor. The CPU is capable of higher frame throughput, as evidenced by the 1080p results, but the GPU cannot maintain those numbers when pixel count increases.

Q: Does the RX 6750 XT’s memory size affect the measured results?

A: The GPU has 12 GB of GDDR6 memory with a 192-bit bus and 432.0 GB/s bandwidth. While the data does not isolate VRAM usage, the significant FPS drops at 4K, where texture memory demands are highest, suggest that the memory subsystem is under heavy load, potentially contributing to the reduced performance.

Q: What is the combo’s rank relative to all other tested configurations?

A: The combo ranks 845th out of 1681 tested combinations in Doom. This places it near the middle of the pack, indicating that while it performs well, there are many faster configurations and many slower ones.

Q: How does the CPU’s single-thread performance relate to the FPS results?

A: The CPU’s 3dmark_single_thread score is 959, and its passmark_single_thread score is 3538. These scores are robust, and the high FPS at 1080p (over 200 FPS on Low) suggests that the CPU’s per-core strength is sufficient to feed the GPU at lower resolutions, but the GPU’s limits become apparent as resolution increases.

Settings Recommendations

The data indicates that the "sweet spot" for this combo is the Medium preset at 1440p. The average FPS of 135.7 at 2560x1440 with Medium settings is 39.3 FPS higher than High settings at the same resolution, and it remains well above the 100 FPS threshold, offering a smooth experience. At 1080p, Medium settings yield 209 FPS, which is a significant improvement over High’s 175.8 FPS, making Medium the best choice for high-refresh-rate monitors. For 4K gaming, the High preset at 61.8 FPS is the only viable option for near-60 FPS gameplay; Ultra drops to 50.9 FPS, which is below the standard 60 FPS target, and Low at 84.3 FPS sacrifices too much visual quality for the frame rate gain. Therefore, Medium at 1440p or High at 4K provides the best balance between visual fidelity and performance, as the measured rows show a sharp decline in FPS when moving from High to Ultra at every resolution.

Measured FPS Breakdown

At 1920x1080, the average FPS ranges from 146.3 on Ultra to 242.2 on Low. The progression is 242.2 (Low), 209 (Medium), 175.8 (High), and 146.3 (Ultra). This represents a 95.9 FPS difference between the lowest and highest settings, with each step up in quality costing roughly 30 FPS. At 2560x1440, the results are 153.4 (Low), 135.7 (Medium), 116.4 (High), and 97.1 (Ultra). The gap between Low and Ultra narrows to 56.3 FPS, showing that the GPU’s rendering limits compress the performance range. At 3840x2160, the numbers are 84.3 (Low), 72.1 (Medium), 61.8 (High), and 50.9 (Ultra). The difference between Low and Ultra is just 33.4 FPS, indicating that the GPU is the dominant constraint and settings adjustments have less impact on absolute frame rates. The data shows a consistent pattern where the relative cost of Ultra settings increases with resolution, while the absolute FPS decreases.

GPU Role

The Radeon RX 6750 XT, with its RDNA 2.0 architecture, is the primary driver of the measured FPS at higher resolutions. Its boost clock of 2600 MHz and game clock of 2495 MHz provide the raw compute power, and the 12 GB of GDDR6 memory on a 192-bit bus delivers a bandwidth of 432.0 GB/s. The GPU’s passmark_g3d score is 20700, and its percentile vs all GPUs is 79, placing it in the upper tier of graphics cards. In Doom, the 4K results (61.8 FPS at High, 50.9 FPS at Ultra) are directly tied to the GPU’s ability to process the increased pixel load. The FP32 performance of 13.31 TFLOPS and the pixel rate of 166.4 GPixel/s are the specifications that govern how quickly frames can be rendered, and the data shows that these limits are hit at 4K. The GPU’s 40 ray accelerators and DirectX 12 Ultimate support do not appear to be a factor in the measured results, as the FPS is more dependent on resolution scaling than on specific features. The decline from 116.4 FPS at 1440p High to 61.8 FPS at 4K High is a 46.9% drop, which aligns with the GPU being the bottleneck.

CPU Role

The AMD Ryzen 7 5800XT, with its 8 cores and 16 threads, provides a strong foundation for Doom’s engine. The CPU’s base clock of 3.80 GHz and boost clock of 4.80 GHz, combined with its Zen 3 architecture, yield a cinebench_r23_multicore score of 23794 and a passmark_multithread score of 27988. These scores indicate that the CPU is not the limiting factor at any resolution tested. The 1080p results, where the CPU must feed the GPU quickly, show high frame rates of 242.2 FPS at Low and 209 FPS at Medium, proving that the processor can handle the game’s thread demands. The CPU’s 32 MB of L3 cache and dual-channel DDR4 memory support with 51.2 GB/s bandwidth are sufficient for the game’s data streaming. The data suggests that the CPU’s role is to maintain high minimum frame rates, but the average FPS is bound by the GPU. The percentile of 86 vs all CPUs, and the fact that the CPU’s nearest rivals like the AMD Ryzen 7 6800HS have similar average scores, confirms that the 5800XT is a capable partner for the RX 6750 XT in this title.

How This Combo Ranks

The combination of the AMD Ryzen 7 5800XT and AMD Radeon RX 6750 XT ranks 845th out of 1681 tested combos in Doom. This rank places it in the 50.2 percentile of all configurations, meaning it outperforms roughly half of the tested systems. The rank is likely influenced by the GPU’s performance, as the CPU’s synthetic benchmarks are above average. The GPU’s nearest rivals include the NVIDIA GeForce RTX 3080, which has an average score of 35787, just 1.3% higher than the RX 6750 XT’s 35327. This close proximity in synthetic benchmarks suggests that the RX 6750 XT is competitive with higher-tier cards, but in Doom, the measured FPS at 4K Ultra (50.9 FPS) is borderline for playability. The rank of 845 indicates that while the combo is not at the top of the charts, it delivers a solid 1080p and 1440p experience, with 4K being the only resolution where it struggles to maintain high frame rates. The data shows that the combo’s performance is consistent with its component benchmarks, and the mid-pack rank reflects the balance between the CPU’s strength and the GPU’s limitations at higher resolutions.