Doom

The AMD Ryzen 7 9800X3D and AMD Radeon RX 6750 XT pairing delivers a remarkably smooth Doom experience across most configurations, though the data reveals a clear ceiling at the highest settings. The measured results show this combo is capable of excellent frame rates, but the balance between the CPU and GPU shifts dramatically as resolution and quality settings change, making preset selection the single most important factor in achieving the best experience.

Settings Recommendations

For the optimal experience, the Medium preset at 1440p provides the best balance of visual fidelity and performance, delivering 137.9 FPS. This sits comfortably above the 116.6 FPS of High settings while maintaining a substantial 45.3 FPS advantage over Ultra at the same resolution. The data suggests that Medium is the sweet spot where the RX 6750 XT's 12 GB memory and 2560 shading units are fully utilized without bottlenecking on the more demanding visual effects.

At 1080p, High settings at 180.1 FPS are the recommended pick for competitive play, as the frame rate remains far above refresh rate capabilities while only sacrificing 60.5 FPS compared to Low. The jump from Low to High at 1080p costs just 60.5 FPS, but the visual improvement is substantial. For those prioritizing maximum smoothness, Low at 1080p achieves 240.6 FPS, but this limits the GPU's workload and leaves performance on the table given the CPU's capabilities.

At 4K, Medium at 72.6 FPS is the only viable choice for a stable experience, as High drops to 64.7 FPS and Ultra falls below 60 FPS at 53.6 FPS. The 18.6 FPS gap between Medium and High at 4K highlights how quickly the GPU becomes the limiting factor at this resolution. The Ryzen 7 9800X3D's 96 MB of L3 cache helps maintain consistent frame pacing, but the RX 6750 XT's 432.0 GB/s memory bandwidth cannot sustain Ultra settings at 4K.

GPU Role

The AMD Radeon RX 6750 XT is the dominant component in this pairing, and its specifications directly explain the measured results. With 12 GB of GDDR6 memory on a 192-bit bus, the card provides 432.0 GB/s of bandwidth, which proves sufficient for Medium settings across all resolutions but struggles with Ultra. The 40 ray accelerators and 64 ROPs handle Doom's Vulkan-based rendering efficiently, yet the 13.31 TFLOPS FP32 throughput creates a clear performance ceiling.

The GPU's clock behavior shows a base of 2150 MHz with a boost of 2600 MHz, and the game clock of 2495 MHz is the realistic sustained frequency. This explains why the scaling from 1080p to 4K is so pronounced: at 1080p Low, the GPU is underutilized at 240.6 FPS, but at 4K Ultra, it drops to 53.6 FPS. The card's 79th percentile ranking among all GPUs, with nearest rivals including the RTX 5070 Ti Mobile (0.3% behind) and RTX 3080 (1.3% behind), places it in capable mid-range territory.

The GPU's memory configuration is particularly telling at 4K. The 12 GB capacity is not the issue, as Doom's 2016 engine is not memory-hungry. Instead, the 192-bit bus and 432.0 GB/s bandwidth become the constraint. The 18.6 FPS difference between High and Medium at 4K, compared to just 21.3 FPS at 1080p, indicates that texture bandwidth demands scale faster than the memory subsystem can deliver at higher resolutions.

CPU Role

The AMD Ryzen 7 9800X3D provides exceptional headroom that prevents it from ever becoming the bottleneck in Doom. Its 8 cores and 16 threads, based on Zen 5 architecture with a 96 MB L3 cache, deliver a Cinebench R23 multi-core score of 34004 and single-core of 4800. The 4.70 GHz base clock and 5.20 GHz boost clock ensure that even the most demanding scenes are processed without CPU-side frame drops.

The CPU's 90th percentile ranking among all processors, with nearest rivals within 0.7% performance (Core i5-13600KF), means it consistently delivers frames faster than the GPU can render them. This is evident in the 1080p results: the jump from Low (240.6 FPS) to Ultra (144.3 FPS) shows a 96.3 FPS drop that is entirely GPU-driven. The CPU maintains its 3dmark single-thread score of 1212 and multi-thread of 10081, which are more than sufficient for Doom's engine.

The 3D V-Cache technology, while not explicitly listed in the cache fields, is implied by the 96 MB shared L3 cache. This large cache helps maintain stable frame times during rapid scene changes, which is critical for a fast-paced FPS. The 8,315 million transistors on a 4 nm process with 89.6 GB/s memory bandwidth to DDR5 ensures the CPU never starves the GPU with data, even at 240+ FPS.

FAQ

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

A: Yes, but only at Medium settings, which achieves 72.6 FPS. High drops to 64.7 FPS, and Ultra falls below 60 FPS at 53.6 FPS, making Medium the only consistent option for 4K gameplay.

Q: What is the best settings preset for competitive play at 1080p?

A: Low settings at 240.6 FPS provide the absolute highest frame rate, but High at 180.1 FPS is the recommended balance, offering a 60.5 FPS reduction for significantly better visual quality while still exceeding most high-refresh displays.

Q: Is the Ryzen 7 9800X3D overkill for this GPU?

A: The data suggests it provides excellent headroom. At 1080p Low, the combo reaches 240.6 FPS, and the CPU's 90th percentile ranking (avg benchmark score 37780) versus the GPU's 79th percentile (avg 35327) shows the CPU is capable of pushing even stronger GPUs without becoming a limiting factor.

Q: How does the RX 6750 XT compare to its nearest rivals in this game?

A: Based on average benchmark scores, the RX 6750 XT (35327) is 0.2% ahead of the RX 5600M, 0.3% behind the RTX 5070 Ti Mobile, and 1.3% behind the RTX 3080, placing it in a tight competitive band.

Q: What frame rate can I expect at 1440p Ultra?

A: The measured average is 95.5 FPS, which is playable but notably lower than Medium's 137.9 FPS. The 42.4 FPS gap between Medium and Ultra at 1440p suggests the GPU's shading units are the limiting factor at the highest quality settings.

Q: Does the combo scale well across resolutions?

A: The scaling is consistent but steep. From 1080p High (180.1 FPS) to 1440p High (116.6 FPS) is a 63.5 FPS drop, and to 4K High (64.7 FPS) is a 115.4 FPS drop, indicating GPU-bound behavior that becomes more pronounced at higher resolutions.

Resolution Scaling

The measured data reveals how the limiting component shifts with resolution. At 1080p, the combo achieves 240.6 FPS on Low, showing the GPU is not fully taxed. The 96.3 FPS drop from Low to Ultra at 1080p (240.6 to 144.3) is substantial, but the CPU's 96 MB L3 cache and high boost clocks keep frame times stable. This resolution is clearly CPU-saturated at lower settings, as the GPU has headroom to spare.

Moving to 1440p, the frame rates compress: Low delivers 158.1 FPS, Medium 137.9, High 116.6, and Ultra 95.5. The 62.6 FPS difference between Low and Ultra at 1440p (versus 96.3 at 1080p) indicates the GPU is becoming the primary constraint. The RX 6750 XT's 416.0 GTexel/s texture rate and 166.4 GPixel/s pixel rate are now more heavily utilized, but the 432.0 GB/s memory bandwidth remains adequate.

At 4K, the GPU bottleneck is absolute. Low achieves 87.2 FPS, but Ultra drops to 53.6 FPS — a 33.6 FPS reduction that is entirely attributable to the GPU's 13.31 TFLOPS throughput and memory bandwidth limits. The 18.6 FPS gap between High (64.7) and Medium (72.6) at 4K, compared to 31.7 FPS at 1440p, shows that the memory subsystem's 192-bit bus becomes the hard limit as pixel count quadruples from 1080p.

Measured FPS Breakdown

At 1920x1080, the combo delivers its highest performance. Low settings produce 240.6 FPS, Medium 211.8 FPS, High 180.1 FPS, and Ultra 144.3 FPS. The progression shows a consistent 29-32 FPS drop per quality tier, with the largest single drop from Medium to High at 31.7 FPS. These results indicate the GPU can handle the pixel count easily, and the CPU's 5.20 GHz boost clock ensures no frame delivery delays.

At 2560x1440, the figures are 158.1 FPS (Low), 137.9 FPS (Medium), 116.6 FPS (High), and 95.5 FPS (Ultra). The 20.2 FPS drop from Low to Medium is smaller than the 21.3 FPS drop from Medium to High, while Ultra takes a 21.1 FPS hit from High. This pattern suggests the GPU's 2560 shading units scale roughly linearly with quality until Ultra, where the 40 ray accelerators begin to affect performance.

At 3840x2160, the results are 87.2 FPS (Low), 72.6 FPS (Medium), 64.7 FPS (High), and 53.6 FPS (Ultra). The 14.6 FPS drop from Low to Medium, 7.9 FPS from Medium to High, and 11.1 FPS from High to Ultra show diminishing returns on quality settings. The total range from 87.2 to 53.6 FPS spans 33.6 FPS, which is the narrowest across all resolutions, confirming the GPU is the sole limiting factor at 4K.

How This Combo Ranks

This pairing ranks 801st out of 1681 tested combos in Doom, placing it in the 48th percentile of all combinations. This mid-pack ranking is surprising given the strong individual component scores, but it reflects the RX 6750 XT's position as a capable but not top-tier GPU. The CPU's 90th percentile and GPU's 79th percentile rankings suggest the combo is balanced, with the GPU being the weaker link.

The ranking becomes more meaningful when considering the CPU's nearest rivals, which include the Intel Core i5-13600KF (0.7% ahead in CPU benchmarks) and Core Ultra 5 225 (0.1% behind). The GPU's nearest rivals, including the RTX 3080 (1.3% ahead), indicate that swapping the GPU would yield larger gains than changing the CPU. The 801st rank out of 1681 combos means roughly 880 tested configurations perform better, likely due to stronger GPUs paired with similar CPUs.

The data shows this combo is well-suited for 1080p and 1440p gaming, with the 1440p Medium result of 137.9 FPS being the standout configuration. At 4K, the combo falls into the lower third of its ranking potential, with only the Medium preset exceeding 60 FPS. For Doom specifically, this pairing offers a strong price-to-performance ratio in the mid-range segment, though the end-of-life production status of the GPU suggests future upgrades would target the GPU rather than the CPU.