Doom

The AMD Ryzen 7 7800X3D paired with the NVIDIA GeForce RTX 4090 delivers exceptional performance in Doom, with measured frame rates that consistently exceed the refresh rate capabilities of most displays. The benchmark data shows a system capable of extreme high-refresh-rate gaming at 1080p and 1440p, while still maintaining highly playable performance at 4K across all tested quality presets.

Resolution Scaling

The measured FPS data reveals a clear and predictable pattern of performance scaling as resolution increases and the rendering load shifts from the CPU to the GPU. At 1080p with High settings, the combo produces an average of 329.5 FPS. Moving to 1440p High, the average drops to 214 FPS, a decrease of 35%. At 4K High, the average falls further to 114.2 FPS, which is 65% lower than the 1080p result.

This scaling behavior indicates that at lower resolutions, the system is heavily CPU-bound, as the Ryzen 7 7800X3D’s 8 cores and 16 threads are capable of feeding the RTX 4090 at extremely high rates. The relatively modest drop from 1080p to 1440p suggests the GPU is still being supplied with enough data to maintain high utilization. However, the substantial drop from 1440p to 4K marks a clear transition to GPU-bound territory, where the RTX 4090’s rendering capacity becomes the primary limiter.

The data across Low, Medium, High, and Ultra presets further confirms this trend. At 4K, the spread from Low (159.1 FPS) to Ultra (94.1 FPS) is 65 FPS, showing that image quality settings have a significant impact on the GPU workload. At 1080p, the same preset spread from Low (394 FPS) to Ultra (267.2 FPS) is 126.8 FPS, but the absolute numbers remain so high that the GPU is unlikely to be the bottleneck. Instead, the 1080p results are constrained by the CPU’s ability to process the game’s simulation and draw calls, with the Ryzen 7 7800X3D’s boost clock of 5.00 GHz proving sufficient to maintain frame rates above 260 FPS even at Ultra settings.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, and its specifications explain its 4K performance headroom. The GPU features 24 GB of GDDR6X memory on a 384-bit bus, delivering a bandwidth of 1.01 TB/s. This large memory pool and high bandwidth are more than sufficient for a 2016 title like Doom, which does not require the latest texture assets or memory-hungry features, allowing the GPU to operate without memory constraints.

The RTX 4090’s clock speeds are notably high, with a base clock of 2235 MHz and a boost clock of 2520 MHz. This high boost clock, combined with 16384 shading units, allows the card to maintain strong frame rates even at 4K Ultra, where the average of 94.1 FPS remains comfortably above the 60 FPS threshold for smooth gameplay. The GPU’s FP32 compute rating of 82.58 TFLOPS provides ample raw processing power for the game’s rendering workloads, which are primarily fill-rate and shader-bound.

The benchmark results show that the RTX 4090 is the bottleneck at 4K, as evidenced by the significant FPS drop from 1440p High (214 FPS) to 4K High (114.2 FPS). This 46.6% reduction in performance is directly attributable to the increased pixel count, which places a heavier load on the GPU’s 176 ROPs and 512 TMUs. The card’s pixel rate of 443.5 GPixel/s and texture rate of 1,290.2 GTexel/s are capable of handling the 4K resolution, but the data indicates that the GPU is working near its limit at this resolution with Ultra settings.

CPU Role

The AMD Ryzen 7 7800X3D provides the computational foundation for this combo, and its specifications are well-matched to Doom’s CPU demands. The processor features 8 cores and 16 threads based on the Zen 4 architecture, with a base clock of 4.20 GHz and a boost clock of 5.00 GHz. This high clock speed is critical for a game like Doom, which relies on single-threaded performance for game logic and physics calculations.

The CPU’s 96 MB of shared L3 cache is a standout feature that contributes to its gaming performance. This large cache reduces memory latency and improves data throughput, which is particularly beneficial in fast-paced FPS games where the CPU must quickly access game state information. The processor’s memory bandwidth of 83.2 GB/s via dual-channel DDR5 support ensures that the CPU can feed data to the GPU without becoming a bottleneck.

The measured 1080p results demonstrate the CPU’s importance in this pairing. At 1080p Low, the system achieves 394 FPS, which is the highest measured result across all configurations. This extreme frame rate is only possible if the CPU is capable of issuing draw calls and updating game state at a rate exceeding 394 times per second. The Ryzen 7 7800X3D’s benchmark scores support this capability, with a Cinebench R23 single-core score of 4115 and a multi-core score of 29149, indicating strong per-core performance and sufficient multi-threading headroom.

The CPU’s role is less prominent at 4K, where the GPU becomes the limiting factor. However, the fact that the 4K Ultra result (94.1 FPS) is still above 90 FPS indicates that the CPU is not causing any frame pacing issues or stalls, even under heavy load from the GPU’s rendering pipeline.

How This Combo Ranks

The combination of the AMD Ryzen 7 7800X3D and NVIDIA GeForce RTX 4090 ranks 34th out of 1681 tested combos in Doom. This places the pairing in the top 2% of all combinations, which is consistent with the extremely high measured frame rates. The rank reflects the synergy between a top-tier gaming CPU and a flagship GPU, resulting in a system that excels in both CPU-bound and GPU-bound scenarios.

The CPU’s own standing among all processors is strong, with a percentile of 87, meaning it outperforms 87% of all CPUs in the database. Its nearest rivals include the Intel Core i7-12700F, which has an average score of 31543 and a deltaPct of 0.1, indicating the Ryzen 7 7800X3D is essentially tied with this Intel chip in overall benchmark performance. The AMD Ryzen 9 5980HX and AMD Ryzen 7 8700G are also close, with deltaPct values of 0.3 and 0.6 respectively, suggesting that the 7800X3D holds a slight edge over these competitors.

The GPU’s percentile of 91 shows it outperforms 91% of all GPUs, and its nearest rivals are professional-grade cards like the NVIDIA Tesla T4 and AMD Radeon Pro Vega 56. The RTX 4090’s average benchmark score of 66473 is 0.4% higher than the Tesla T4, which is a negligible difference in synthetic tests but translates into a significant advantage in real-world gaming due to its gaming-specific optimizations.

The combo’s 34th place ranking out of 1681 reflects the balanced nature of this pairing. While a higher rank would require an even more capable GPU, which does not exist in the consumer market, the current configuration already delivers frame rates that exceed the capabilities of most high-refresh-rate monitors.

FAQ

Q: What is the average FPS at 4K Ultra settings?

A: The measured average FPS at 3840x2160 with Ultra settings is 94.1 FPS, which is above the standard 60 FPS target for smooth gameplay.

Q: How does the RTX 4090’s memory bandwidth affect performance?

A: The RTX 4090 has a memory bandwidth of 1.01 TB/s, which is sufficient for Doom’s needs and ensures that the GPU is not memory-limited at any tested resolution or quality setting.

Q: Is the Ryzen 7 7800X3D a bottleneck at 1080p?

A: The data shows that the CPU is the primary limiter at 1080p, as the system achieves 394 FPS at Low settings, but the CPU’s 8 cores and 16 threads with a 5.00 GHz boost clock are still capable of delivering extremely high frame rates above 260 FPS at all presets.

Q: What is the performance difference between 1080p High and 4K High?

A: The average FPS at 1080p High is 329.5, while at 4K High it is 114.2. This represents a 65.3% decrease in performance when moving to the higher resolution.

*Q: How does this combo rank among all tested configurations in Doom?*

A: This combo ranks 34th out of 1681 tested combinations, placing it in the top 2% of all systems tested for this game.

Q: What are the closest rivals to the Ryzen 7 7800X3D in terms of average benchmark score?

A: The closest rival is the Intel Core i7-12700F with a deltaPct of 0.1, followed by the AMD Ryzen 9 5980HX with a deltaPct of 0.3, indicating the 7800X3D has a negligible advantage over these processors.