Doom

The AMD Ryzen 9 7900X paired with the AMD Radeon RX 6700 XT delivers a compelling 1080p and 1440p experience in Doom, but the data reveals a clear shift in bottleneck behavior as resolution climbs. This analysis breaks down the measured FPS across 12 unique resolution and settings combinations, examining what the numbers indicate about the CPU, GPU, and overall system balance.

Resolution Scaling

The measured FPS data shows a predictable but steep decline as resolution increases, which is the signature of a system transitioning from CPU-bound to GPU-bound behavior. At 1080p with Low settings, the combo produces 231.3 FPS; stepping up to 1440p Low drops that to 151.3 FPS, and 4K Low falls further to 78.6 FPS. That represents a 34.6% drop from 1080p to 1440p and a 48.0% drop from 1440p to 4K at the same settings tier.

The scaling pattern is even more pronounced at Ultra settings. The system manages 138.8 FPS at 1080p Ultra, which falls to 89.6 FPS at 1440p Ultra, a 35.4% reduction. Moving from 1440p Ultra to 4K Ultra yields just 52.2 FPS, a 41.7% decline. These percentage drops are larger than the pixel count differences alone would suggest, indicating that the GPU is becoming the primary limiter at higher resolutions.

What is particularly telling is the gap between Low and Ultra settings at each resolution. At 1080p, the difference is 92.5 FPS (231.3 vs 138.8), showing significant headroom in the CPU to push frames when the GPU load is light. At 4K, that same Low-to-Ultra gap shrinks to 26.4 FPS (78.6 vs 52.2), meaning the GPU is saturated and settings changes have less relative impact. The data implies that users targeting 4K will need to accept lower settings to approach playable frame rates, while 1080p users have substantial performance reserves.

CPU Role

The Ryzen 9 7900X brings 12 cores and 24 threads based on the Zen 4 architecture, with a base clock of 4.70 GHz and boost clock of 5.60 GHz. In a 2016-released FPS like Doom, the game's engine does not scale infinitely with core count, so the single-thread and lightly-threaded performance of this CPU is what matters most for the high frame rates seen at 1080p.

The benchmark data supports this interpretation. In 3DMark single-thread testing, the CPU scores 1093, while the 16-thread test reaches 10972 and max-thread scores hit 12536. The gap between 16-thread and max-thread results is modest, suggesting diminishing returns beyond 16 threads for many workloads. For Doom specifically, the 1080p Low result of 231.3 FPS demonstrates that the CPU can feed the GPU well beyond typical 144Hz monitor refresh rates.

The CPU's Cinebench R23 scores — 43695 multicore and 6168 single-core — place it in the 93rd percentile versus all CPUs. Its nearest rivals in average benchmark score are the Intel Core Ultra 5 235 at -0.1% delta, the AMD Ryzen 9 5900XT at -0.4%, and the Intel Core i7-13850HX at -0.5%. This positioning confirms that the 7900X is a high-end processor, though not the absolute fastest, and its 4.70 GHz base clock helps ensure consistent performance in games that favor frequency over core count.

How This Combo Ranks

Within the benchmark database, this specific CPU+GPU combination ranks 938 out of 1681 tested combos for Doom. That places it in the 44th percentile of all pairings, which initially seems modest given the strong individual component scores. However, context matters: the combo ranking reflects the balance between the 7900X's high CPU performance and the RX 6700 XT's mid-range GPU positioning.

The GPU sits in the 77th percentile versus all GPUs, while the CPU is in the 93rd percentile. This imbalance means the RX 6700 XT is the limiting factor in most scenarios, particularly at higher resolutions. The combo's rank of 938 suggests that many other pairings with weaker CPUs but stronger GPUs may outperform it in GPU-bound titles like Doom at 1440p and 4K.

The data indicates that this pairing is well-suited for 1080p and 1440p gaming where the CPU's strength can be fully utilized. At 4K, the combo's ranking would likely be lower than at lower resolutions, as the GPU becomes the sole bottleneck and the CPU's advantages are largely irrelevant.

Measured FPS Breakdown

At 1920x1080, the combo delivers its strongest results. Low settings produce 231.3 FPS, Medium yields 200.1 FPS, High reaches 169.4 FPS, and Ultra drops to 138.8 FPS. All four settings tiers exceed 138 FPS, meaning even Ultra settings maintain frame rates suitable for high-refresh 1080p displays.

Moving to 2560x1440, the performance remains strong but shows the GPU beginning to strain. Low settings produce 151.3 FPS, Medium hits 129.6 FPS, High manages 112.4 FPS, and Ultra falls to 89.6 FPS. The step from Low to Ultra costs 61.7 FPS, or roughly 40.8% of the Low result. All settings remain above 60 FPS, making 1440p viable across the board, though Ultra may not satisfy users with 144Hz monitors.

At 3840x2160, the picture changes dramatically. Low settings produce 78.6 FPS, Medium drops to 70.3 FPS, High yields 57.3 FPS, and Ultra falls to 52.2 FPS. Only Low and Medium settings clear 60 FPS at 4K, and even those are marginal. High and Ultra settings dip below the 60 FPS threshold, suggesting that 4K gaming with this combo requires settings compromises.

The progression from 1080p Ultra to 4K Ultra shows a 62.4% performance reduction (138.8 to 52.2 FPS), while the Low settings progression shows a 66.0% reduction (231.3 to 78.6 FPS). The percentage drops are similar across settings, indicating that resolution scaling is the dominant factor rather than settings-specific behavior.

GPU Role

The Radeon RX 6700 XT is built on the RDNA 2.0 architecture with the Navi 22 chip, manufactured on a 7 nm process. It features 2560 shading units, 160 texture mapping units, and 64 raster operation units, with 40 ray tracing cores. The GPU's 12 GB of GDDR6 memory runs across a 192-bit bus, providing 384.0 GB/s of bandwidth.

Clock speeds are notably high: the base clock is 2321 MHz, the game clock is 2424 MHz, and the boost clock reaches 2581 MHz. This aggressive clocking helps compensate for the relatively modest 13.21 TFLOPS FP32 performance. The GPU's pixel rate is 165.2 GPixel/s and texture rate is 413.0 GTexel/s, which are competitive figures for its class.

The GPU's benchmark scores show a mixed picture. In Passmark G3D, it scores 19786, while DirectX 12 testing yields just 77. Geekbench OpenCL produces 100730 and Vulkan reaches 108032. The GPU's nearest rivals in average benchmark score include the AMD Radeon RX 6800 at +0.7% delta, the NVIDIA RTX A5000 at +1.3%, and the AMD Radeon HD 7950 at -1%. This positioning confirms the RX 6700 XT sits comfortably in the upper-mid-range, capable of 1080p and 1440p gaming but not designed for 4K at high settings.

FAQ

Q: What is the best resolution for this combo in Doom?

A: The data shows 1920x1080 and 2560x1440 are both viable. At 1440p, High settings produce 112.4 FPS and Ultra yields 89.6 FPS, while 1080p Ultra hits 138.8 FPS. At 4K, only Low (78.6 FPS) and Medium (70.3 FPS) clear 60 FPS.

Q: How does the CPU affect performance at different resolutions?

A: At 1080p, the CPU's strength is evident — Low settings reach 231.3 FPS, showing the 7900X can feed frames rapidly. At 4K, the gap between Low (78.6 FPS) and Ultra (52.2 FPS) narrows, indicating the GPU becomes the bottleneck and CPU headroom matters less.

Q: Is this combo better suited for competitive or casual play?

A: The 1080p results (169.4 FPS at High, 138.8 FPS at Ultra) support competitive play on high-refresh monitors. At 1440p, the 112.4 FPS High result also supports fast-paced play. The 4K results are more suitable for slower, visual-focused sessions.

Q: How does the RX 6700 XT compare to its nearest GPU rivals?

A: The RX 6700 XT's average benchmark score is 33721. Its nearest rival, the RX 6800, scores 33493, a 0.7% delta. The HD 7950 and RX 480 both score higher at 34050 and 34059 respectively, showing the 6700 XT is closely matched with several cards.

Q: What does the combo ranking of 938 out of 1681 indicate?

A: The rank places this pairing in the middle of all tested combos. The CPU's 93rd percentile performance is not fully utilized because the GPU's 77th percentile performance limits overall results, especially at higher resolutions.

Q: Can this combo handle 4K gaming in Doom?

A: Yes, but with limitations. Low settings produce 78.6 FPS and Medium yields 70.3 FPS, both playable. High and Ultra drop to 57.3 and 52.2 FPS respectively, which may be acceptable but fall below 60 FPS.

Settings Recommendations

For 1080p gaming, Ultra settings at 138.8 FPS are the clear choice — the frame rate remains high enough for smooth play while maximizing visual quality. Users prioritizing maximum frame rates could select Low for 231.3 FPS, but the visual trade-off is substantial.

At 1440p, High settings at 112.4 FPS offer the best balance. Ultra drops to 89.6 FPS, which is still playable, but High provides a 25.5% performance boost with minimal visual degradation. Users with 144Hz monitors should consider Medium at 129.6 FPS to stay above 120 FPS.

For 4K, Medium settings at 70.3 FPS provide the best experience — the only setting tier that exceeds 60 FPS while retaining reasonable visual fidelity. Low at 78.6 FPS is the alternative for maximum smoothness, but High and Ultra fall below 60 FPS and are not recommended for this resolution. The data suggests this combo is best used at 1440p or lower, where it delivers consistently strong performance across all settings.