Doom

# How This Combo Ranks

The AMD Ryzen 9 9900X3D paired with the AMD Radeon RX 7900 XT lands at rank 533 out of 2,930 tested combos in Doom, placing it in the top 18.2% of all configurations. This is a strong showing for a system built around a 12-core Zen 5 processor and a RDNA 3.0 flagship-class GPU, though the ranking suggests that several higher-end combinations—likely featuring even faster GPUs—still pull ahead in this title.

The combo's percentile placement becomes more interesting when you consider the individual components. The CPU sits at the 91st percentile among all processors, while the GPU trails at the 55th percentile among all graphics cards. That gap hints at a notable imbalance: the processor is a top-tier part, but the graphics card, while capable, is not in the same elite tier. In a game like Doom—a fast-paced FPS where frame rates are heavily GPU-bound at higher resolutions—this means the 9900X3D's headroom is not fully utilized. The data shows the combo's rank is likely constrained more by the GPU's position than by the CPU's raw capabilities.

Looking at the nearest rivals for the CPU, the 9900X3D's average benchmark score of 54,762 sits just 0.6% below the Intel Core Ultra 5 245KF (55,093) and 1.3% above the Intel Core Ultra 5 245K (54,053). These are tight margins, indicating the Ryzen 9 is in a dense performance cluster. The GPU's nearest rivals are more disparate: the Radeon RX 7900 XT's average score of 13,745 is nearly identical to the AMD Radeon 660M (13,812, -0.5%) and the NVIDIA RTX A2000 Mobile (13,821, -0.5%), but those are integrated or mobile parts, not desktop cards. The closest desktop competitor, the AMD Radeon RX 9070 XT, scores 13,543, putting the 7900 XT just 1.5% ahead. This suggests the GPU is not dramatically faster than its immediate peers, which helps explain the mid-pack combo ranking.

GPU Role

The Radeon RX 7900 XT brings 20 GB of GDDR6 memory on a 320-bit bus, delivering 800.0 GB/s of bandwidth. For Doom, a game from 2016, this is far more VRAM than the title requires; even at 4K Ultra, the game's texture sets are modest by modern standards. The 20 GB capacity is effectively future-proofing—it will never be a limiting factor here. The memory clock runs at 2500 MHz (20 Gbps effective), which is standard for the Navi 31 chip.

The GPU's clock behavior shows a base of 1387 MHz and a boost of 2394 MHz, with a "game" clock of 2025 MHz that represents typical sustained speeds under load. In Doom's benchmark data, the card's performance scales predictably with resolution. At 1080p, the GPU is often not the bottleneck—frame rates reach 338 FPS on Low settings—but at 4K, the card's compute resources become the primary constraint. The GPU's specs include 5,376 shading units, 336 TMUs, and 192 ROPs, which translate to a pixel rate of 459.6 GPixel/s and a texture rate of 804.4 GTexel/s. These figures explain why the card can push high frame rates at lower resolutions but sees a steep drop at 4K Ultra, where the pixel and texture throughput are taxed more heavily.

The GPU's 84 ray-tracing cores and 51.48 TFLOPS of FP32 compute are more relevant to modern titles, but Doom's original release did not use ray tracing, so these capabilities go largely untapped. The data shows the GPU's percentile rank of 55 is middling, which is surprising for a card with this much memory bandwidth. The nearest rivals in the benchmark database—including the RX 9070 XT at 1.5% behind—suggest the 7900 XT is not head-and-shoulders above its contemporaries, possibly due to driver maturity or the specific workloads in the benchmark suite. In Doom, the card delivers playable frame rates at all settings, but it does not dominate the way its 800 GB/s bandwidth might imply.

CPU Role

The Ryzen 9 9900X3D is a 12-core, 24-thread processor built on Zen 5 (Granite Ridge) using a 4 nm TSMC process. Its base clock of 4.40 GHz and boost clock of 5.50 GHz are impressive for a chip with 128 MB of L3 cache, which is a key advantage in gaming. The large cache helps reduce memory latency, which can boost frame rates in CPU-bound scenarios. Doom's id Tech 6 engine is known for being well-optimized, and it can scale across multiple threads, but it is not as demanding as newer titles. The 9900X3D's 24 threads are overkill for this game; the benchmark data shows that even at 1080p Low—the most CPU-bound configuration—the combo achieves 338 FPS, which is likely beyond the engine's typical frame-rate ceiling.

The CPU's benchmark scores tell a story of strong multi-threaded performance. In Cinebench R23, the chip scores 47,737 multi-core and 6,739 single-core, with a Geekbench multi-core score of 22,884. These numbers place it in the top tier for productivity, but for Doom specifically, single-core performance matters more. The 3DMark single-thread score of 1,269 and PassMark single-thread score of 4,646 indicate solid per-core capability, which is what drives high frame rates in this engine. The CPU's 91st percentile ranking among all processors confirms it is a top-tier part, but the measured FPS data shows it is rarely the limiting factor—the GPU starts to bottleneck at 1440p and above.

The CPU's nearest rivals in the database—the Intel Core Ultra 5 245KF, Core Ultra 5 245K, Xeon 6505P, and Core i7-14700F—all have average scores within 2.1% of the 9900X3D. This clustering suggests that for Doom, any of these CPUs would deliver similar frame rates when paired with the same GPU, as the game does not push multi-core performance to its limits. The 9900X3D's 120W TDP and dual-die design (2x 70.6 mm², totaling 16,630 million transistors) are more relevant to thermal management than to Doom's performance, which is primarily GPU-bound at higher resolutions.

FAQ

Q: Is this combo better suited for 1080p or 4K gaming in Doom?

A: The data shows the combo excels at 1080p, where it reaches 338 FPS on Low settings and 203 FPS on Ultra. At 4K, performance drops to 119 FPS on Low and 71 FPS on Ultra, so the system is more comfortable at 1080p or 1440p for high refresh rates.

Q: Why does the GPU's percentile rank (55) seem low for a high-end card?

A: The GPU's average benchmark score of 13,745 places it close to the AMD Radeon 660M (13,812) and NVIDIA RTX A2000 Mobile (13,821), which are lower-tier parts. This suggests the benchmark database's scoring may weight certain workloads that favor other cards, or the 7900 XT's performance is more variable across tests. In Doom specifically, the card performs well, but its overall percentile drags down the combo's rank.

Q: How much does the CPU's 128 MB L3 cache help in Doom?

A: The large L3 cache likely benefits frame pacing and minimum FPS in CPU-bound scenarios. At 1080p Medium, the combo records a min FPS of 251, which is high, indicating the cache helps maintain smooth performance. However, the CPU is not the bottleneck at 1440p or 4K, so the cache's impact diminishes at higher resolutions.

Q: What is the biggest performance difference between Low and Ultra settings at 4K?

A: At 4K, the average FPS drops from 119 on Low to 71 on Ultra, a 40% reduction. This is a significant gap, showing that the GPU is heavily taxed by Ultra settings, which likely include higher texture filtering, shadow quality, and post-processing effects.

Q: Does the combo show any signs of CPU bottlenecking in the measured data?

A: At 1080p Low, the combo hits 338 FPS, which is likely near the engine's cap or the CPU's limit. The fact that 1080p Ultra (203 FPS) is only 29% lower than 1080p Low (338 FPS) suggests the CPU can keep up, but the GPU starts to become the limiting factor even at 1080p when settings are raised.

Q: How does this combo compare to the nearest GPU rival, the RX 9070 XT?

A: The RX 7900 XT's average benchmark score is 13,745, which is 1.5% higher than the RX 9070 XT's 13,543. In Doom, this small margin means the two cards would likely produce nearly identical frame rates, making the 7900 XT's 20 GB VRAM the only practical advantage.

Resolution Scaling

The measured FPS data shows a clear pattern of performance degradation as resolution increases, which is typical for a GPU-bound title. At 1080p, the combo delivers extremely high frame rates: 338 FPS on Low, 295 FPS on Medium, 249 FPS on High, and 203 FPS on Ultra. Moving to 1440p, those numbers drop to 219 FPS, 191 FPS, 161 FPS, and 132 FPS, respectively. At 4K, the figures fall further to 119 FPS, 103 FPS, 87 FPS, and 71 FPS.

The percentage drops from 1080p to 4K are revealing. On Low settings, the FPS drops from 338 to 119, a 65% reduction. On Medium, it drops from 295 to 103, a 65% reduction as well. High sees a drop from 249 to 87, also 65%. Ultra drops from 203 to 71, a 65% reduction. This consistent 65% decline across all settings indicates that the GPU is uniformly the bottleneck at higher resolutions—the CPU's performance headroom is not being tapped, as the frame rate scales almost exactly with the pixel count difference (1080p has 2.07 million pixels, 4K has 8.29 million, a 4x increase, but the FPS drops by only 65%, suggesting the GPU is not fully saturated at 1080p).

The data implies that at 1080p, the CPU is still relevant, as the frame rates are high enough that the CPU's single-thread performance and cache can influence results. However, at 1440p and 4K, the GPU's fill rate and compute capacity dominate. The 1440p to 4K transition shows a smaller relative drop (e.g., High goes from 161 to 87 FPS, a 46% reduction), which is less than the 1080p to 4K drop, indicating that the GPU's scaling is not linear with pixel count. This suggests the card has more headroom at 1440p than the raw pixel math would imply, possibly due to memory bandwidth not being fully utilized until 4K.

Settings Recommendations

Based on the measured rows, the best experience depends on the target resolution and refresh rate. For 4K gaming, the High preset delivers 87 FPS average, which is smooth for a single-player FPS and a good balance between visual quality and performance. The Medium preset at 4K offers 103 FPS, which is also excellent, but the jump to High adds visual fidelity without a massive penalty (87 FPS vs. 103 FPS, a 15% drop). The Ultra preset at 4K drops to 71 FPS, which is still playable but may feel less responsive for fast-paced action. Low at 4K (119 FPS) is unnecessary unless chasing the highest frame rates, as the visual downgrade is significant.

At 1440p, the Ultra preset (132 FPS) is the clear choice, as it stays well above 120 FPS and provides the best visual quality. The High preset (161 FPS) is also viable for 1440p 165Hz monitors, but Ultra's extra effects are worth the 18% FPS cost. At 1080p, the Ultra preset (203 FPS) is recommended for most users, as it maintains a high frame rate while maximizing visuals. The Medium preset (295 FPS) is only relevant for competitive play on 240Hz+ displays, but the difference between Medium and Ultra is substantial in visual terms.

The data shows that the combo is capable of running Doom at maximum settings at 1440p and 4K with playable frame rates. For the smoothest experience, 1440p Ultra is the sweet spot, balancing the GPU's strengths with the CPU's capabilities. At 4K, High is the recommended preset, as it avoids the steep performance penalty of Ultra while still looking excellent.

Measured FPS Breakdown

The measured FPS data covers three resolutions and four settings presets, providing a comprehensive view of the combo's performance.

1920x1080:

• Low: 338 FPS average
• Medium: 295 FPS average, with min 251 FPS and max 339 FPS
• High: 249 FPS average
• Ultra: 203 FPS average

2560x1440:

• Low: 219 FPS average
• Medium: 191 FPS average, with min 162 FPS and max 219 FPS
• High: 161 FPS average
• Ultra: 132 FPS average

3840x2160:

• Low: 119 FPS average
• Medium: 103 FPS average, with min 88 FPS and max 119 FPS
• High: 87 FPS average
• Ultra: 71 FPS average

The Medium preset is the only one with recorded min/max FPS values, and those numbers reveal frame pacing behavior. At 1080p Medium, the min FPS of 251 is 85% of the average (295 FPS), indicating consistent frame delivery. At 1440p Medium, the min FPS of 162 is also 85% of the average (191 FPS), showing similar consistency. At 4K Medium, the min FPS of 88 is 85% of the average (103 FPS), and the max FPS of 119 matches the Low preset's average at 4K, suggesting that Medium settings at 4K can occasionally hit frame rates as high as the Low preset's average.

The scaling between presets is roughly linear across resolutions. At 1080p, going from Low to Ultra reduces FPS by 40% (338 to 203). At 1440p, the same transition reduces FPS by 40% (219 to 132). At 4K, the reduction is also 40% (119 to 71). This consistency indicates that the GPU's performance scales evenly with the settings' demands, and the CPU does not introduce any bottlenecks that would cause non-linear scaling. The 4K High preset (87 FPS) is the lowest recommended setting for a smooth experience, while the 4K Ultra (71 FPS) is the most demanding configuration measured.