Doom

The AMD Ryzen 7 7800X3D paired with the AMD Radeon RX 6750 XT delivers a robust Doom experience, but the benchmark data reveals a clear shift in performance bottlenecks as resolution climbs. At 1080p, the combination produces exceptionally high frame rates that outpace most displays, while 4K results settle into a playable but less comfortable range. This analysis breaks down the measured data to show exactly where this combo excels and where its limits appear.

Resolution Scaling

The transition from 1080p to 4K exposes a classic GPU-bound scaling pattern. At 1920x1080 with Low settings, the combo hits 243.5 FPS, but dropping to 2560x1440 Low reduces that to 156.3 FPS — a 35.8% decrease. Moving further to 3840x2160 Low yields 84.1 FPS, another 46.2% drop from the 1440p figure. This steep decline indicates the RX 6750 XT becomes the limiting factor as pixel count rises, with the Ryzen 7 7800X3D's strong single-thread performance (3dmark_single_thread score of 959) leaving ample CPU headroom at higher resolutions.

The scaling pattern holds across all settings presets. High settings show 179 FPS at 1080p, dropping to 112.5 FPS at 1440p (a 37.2% reduction), then down to 59.8 FPS at 4K (a 46.8% reduction from 1440p). Ultra settings follow suit: 146.7 FPS at 1080p, 96.3 FPS at 1440p, and 52.8 FPS at 4K. The consistent ~46-47% penalty when moving from 1440p to 4K across all presets confirms the GPU's rendering pipeline, not the CPU or memory subsystem, dictates performance at higher resolutions.

Interestingly, the gap between Low and Ultra settings narrows as resolution increases. At 1080p, the spread between Low (243.5 FPS) and Ultra (146.7 FPS) is 96.8 FPS — a 66% advantage for Low. At 4K, that spread shrinks to 31.3 FPS (84.1 vs 52.8), a 59.2% advantage. This compression suggests that at 4K, the GPU is so saturated that reducing settings yields diminishing returns, while at 1080p, the CPU keeps feeding frames fast enough for settings to matter more.

GPU Role

The Radeon RX 6750 XT brings 12 GB of GDDR6 memory on a 192-bit bus, delivering 432.0 GB/s of bandwidth. This memory configuration proves adequate for Doom at all tested resolutions, as the game's 2016 engine doesn't demand excessive VRAM. The GPU's 2560 shading units and 64 ROPs, running at a boost clock of 2600 MHz, provide the raw throughput that drives the measured results. The card's 13.31 TFLOPS FP32 performance and 416.0 GTexel/s texture rate handle Doom's fast-paced environments without obvious texture streaming issues.

The GPU's benchmark percentile of 79 places it above most cards, with an avgBenchmarkScore of 35327. Its nearest rival, the NVIDIA GeForce RTX 3080, scores 35787 — just 1.3% higher — which contextualizes the RX 6750 XT's position as a solid mid-to-upper tier option. The 40 RT cores and RDNA 2.0 architecture support DirectX 12 Ultimate, though Doom's Vulkan-based rendering doesn't heavily leverage ray tracing features.

At 4K Ultra, the combo produces 52.8 FPS, which dips below the 60 FPS threshold many players target. The 4K High preset at 59.8 FPS nearly hits that mark, suggesting the GPU is right at the edge of comfortable 4K playability. The card's 250 W TDP and dual-slot design with 1x 6-pin + 1x 8-pin power connectors indicate a power-hungry part, but the performance per clock is respectable given its 7 nm process node and 17,200 million transistors.

How This Combo Ranks

Among 1681 tested CPU-GPU combinations in Doom, this pairing ranks 812th, placing it just above the median. This mid-pack ranking might seem modest given the strong individual component benchmarks, but it reflects the reality that Doom is highly optimized and many newer, more expensive GPUs can achieve very high frame rates at 1080p. The Ryzen 7 7800X3D's 87th percentile ranking among all CPUs (avgBenchmarkScore 31580) and the RX 6750 XT's 79th percentile among GPUs (avgBenchmarkScore 35327) combine to produce a balanced but not top-tier gaming system.

The CPU's nearest rivals help contextualize its performance. The Intel Core i7-12700F scores 31543 (0.1% lower), the AMD Ryzen 9 5980HX scores 31495 (0.3% lower), and the AMD Ryzen 7 8700G scores 31407 (0.6% lower). This clustering means the 7800X3D offers no meaningful CPU advantage over these alternatives in synthetic benchmarks, though its 96 MB shared L3 cache and 5.00 GHz boost clock may help in cache-sensitive workloads. The GPU's nearest rivals show a similar tight grouping: the RX 5600M is 0.2% lower, while the RTX 5070 Ti Mobile is 0.3% higher and the RTX 3080 is 1.3% higher.

The 812th rank out of 1681 means 869 combos outperform it in Doom specifically. This is not a criticism of the hardware — it's a reflection of Doom's scalability and the presence of many high-end GPUs in the database. For context, the combo's 1080p Ultra result of 146.7 FPS is still far above playable thresholds, and the 4K High result of 59.8 FPS nearly hits 60 FPS.

Measured FPS Breakdown

The measured data provides a complete picture across three resolutions and four settings presets. At 1920x1080, the combo delivers exceptional performance: Low settings produce 243.5 FPS, Medium hits 207.8 FPS, High reaches 179 FPS, and Ultra still manages 146.7 FPS. These numbers suggest the CPU and GPU together are never the limiting factor at 1080p — even Ultra settings leave headroom for high-refresh-rate monitors.

At 2560x1440, performance remains strong but begins to show the GPU's strain. Low yields 156.3 FPS, Medium produces 138.2 FPS, High achieves 112.5 FPS, and Ultra drops to 96.3 FPS. All four presets remain above 90 FPS, making 1440p a sweet spot for this combo — it delivers smooth gameplay on high-refresh displays without requiring settings compromises.

At 3840x2160, the picture changes. Low pulls 84.1 FPS, Medium delivers 75.7 FPS, High reaches 59.8 FPS, and Ultra falls to 52.8 FPS. The 4K High result of 59.8 FPS is just under 60, while Ultra at 52.8 FPS is playable but not ideal for fast-paced action. Players targeting 4K should stick with High settings or accept slightly lower frame rates at Ultra. The progression from Low to Ultra at each resolution shows consistent 15-20% drops per preset step, with the 4K Ultra result representing the most demanding scenario in the dataset.

FAQ

Q: Can this combo maintain 60+ FPS at 4K?

A: Only with settings at Medium (75.7 FPS) or Low (84.1 FPS). The High preset produces 59.8 FPS, just below 60, while Ultra drops to 52.8 FPS.

Q: What is the best resolution for high-refresh-rate gaming?

A: 2560x1440 is the optimal choice. Even at Ultra settings, it delivers 96.3 FPS, and dropping to Low reaches 156.3 FPS — both well above 60 FPS thresholds.

Q: How much performance is lost moving from 1080p to 1440p?

A: The drop varies by preset: Low loses 87.2 FPS (243.5 to 156.3), Medium loses 69.6 FPS (207.8 to 138.2), High loses 66.5 FPS (179 to 112.5), and Ultra loses 50.4 FPS (146.7 to 96.3).

Q: Is the CPU or GPU the bottleneck at 1080p?

A: The data indicates the GPU is not the limiting factor at 1080p, as even Ultra settings reach 146.7 FPS. The CPU's strong single-thread score (959 in 3dmark_single_thread) suggests it feeds frames adequately, but the tight grouping of 1080p results across presets implies some CPU limitation at the very highest frame rates.

Q: How does this combo compare to the RTX 3080 pairing?

A: The RX 6750 XT scores 1.3% lower in average benchmark (35327 vs 35787), so in Doom specifically, expect the RTX 3080 to deliver roughly 1-2 FPS more at each setting — a negligible difference in practice.

Q: What is the most demanding setting in the test?

A: 4K Ultra at 52.8 FPS is the lowest measured result. This represents a 78.3% drop from the best result (1080p Low at 243.5 FPS).

Settings Recommendations

For 1080p gaming, the data shows no practical need to compromise. Even Ultra settings produce 146.7 FPS, which exceeds most monitors' refresh rates. If you own a 240 Hz display, Low settings at 243.5 FPS will push the absolute maximum, but the visual trade-off rarely justifies it. Play at Ultra for the best image quality — the frame rate remains far above playable.

For 1440p, the sweet spot is High settings at 112.5 FPS. This delivers excellent visual fidelity while maintaining a comfortable margin above 60 FPS. Ultra at 96.3 FPS is also viable if you prioritize image quality over headroom. Dropping to Medium (138.2 FPS) makes sense for competitive play requiring maximum responsiveness, but the visual downgrade is noticeable.

For 4K, the choice depends on your tolerance for frame rate dips. High settings at 59.8 FPS is the most balanced option, offering near-60 FPS gameplay with good visuals. Medium at 75.7 FPS provides a smoother experience and is recommended if you notice stutter during intense combat sequences. Ultra at 52.8 FPS is playable for slower-paced exploration but may feel sluggish during fast encounters. Low at 84.1 FPS is the competitive choice, though the reduced detail in Doom's atmospheric environments detracts from the experience. Given the data, 4K High delivers the best balance of image quality and performance for most players.