Doom

The AMD Ryzen 9 5950X paired with the Intel Arc B390 presents a stark example of GPU-bound performance in Doom. The 16-core, 32-thread processor is capable of far more than the integrated graphics can deliver, making this configuration’s performance entirely dependent on the Arc B390’s output. The measured frames per second across resolutions and settings tell a consistent story: this is a low-power integrated graphics solution that struggles to maintain playable frame rates at higher resolutions, while the CPU remains largely idle in terms of its potential.

Resolution Scaling

The data shows a dramatic and predictable drop in frame rates as resolution increases from 1920x1080 to 3840x2160. At the High preset, the average FPS falls from 78 at 1080p to 51 at 1440p, and finally to 28 at 4K. This represents a 64% reduction in average FPS from 1080p to 4K. The scaling is not linear, however. The jump from 1080p to 1440p costs 27 FPS, while the jump from 1440p to 4K costs an additional 23 FPS. This indicates that the GPU is being pushed progressively harder, with the 4K resolution being particularly punishing.

Looking at the Low preset, the pattern is similar but the starting point is higher. The average FPS at 1080p is 107, which drops to 69 at 1440p, and then to 37 at 4K. The 4K result is still 34.6% higher than the High preset at the same resolution, showing that reducing graphical load does help, but it cannot overcome the fundamental resolution limitations. The scaling from 1080p to 1440p on Low is a 35.5% decrease, and from 1440p to 4K is a 46.4% decrease, showing that the cost of each resolution step grows at the top end.

The Medium preset, which is the only one with reported min and max FPS values, shows a 1080p average of 93 FPS with a minimum of 79 and a maximum of 107. At 1440p, the average drops to 60 FPS with a minimum of 51 and a maximum of 69. At 4K, the average is 33 FPS with a minimum of 28 and a maximum of 37. The consistency of the frame times at 1080p, where the min and max are only 28 FPS apart, suggests that the GPU is handling the load without major stutters at that resolution. At 4K, the gap between min and max is 9 FPS, indicating a slightly wider variance but still a relatively stable output.

This scaling pattern points squarely at the Intel Arc B390 as the limiting component. The Ryzen 9 5950X has a boost clock of 4.90 GHz and 64 MB of L3 cache, which is more than sufficient for a game like Doom. The fact that the FPS drops so precipitously with resolution means the rendering pipeline is saturated by the GPU's compute and fill rate limits, not the CPU's ability to feed it instructions. The 24 ROPs and 48 TMUs on the Arc B390 are simply not enough to handle the pixel and texture throughput required at 4K, resulting in the sub-30 FPS averages seen at Ultra and High settings.

Settings Recommendations

For a playable experience, the data clearly favors 1080p as the target resolution. At 1080p, the Low preset delivers an average of 107 FPS, which is excellent for a fast-paced FPS. The Medium preset still offers a very playable 93 FPS, and the High preset at 78 FPS is also acceptable. The Ultra preset at 1080p drops to 64 FPS, which is still playable but begins to show the GPU's strain.

Moving to 1440p, the situation becomes more difficult. The Low preset at 69 FPS is the only setting that consistently breaks into smooth territory. The Medium preset at 60 FPS is on the edge of playability, and the High preset at 51 FPS may feel sluggish in intense combat. The Ultra preset at 41 FPS is not recommended for a game that demands quick reflexes. At 4K, none of the presets are truly playable. The Low preset at 37 FPS is the best option, but it falls short of the 60 FPS target most competitive players seek.

The optimal experience, based on the measured rows, is the Medium preset at 1080p. It offers a 93 FPS average, which is 16 FPS higher than High and 29 FPS lower than Low. The Medium preset also provides a more stable frame time window, with a min of 79 and max of 107, compared to the less detailed reporting for other presets. This suggests a good balance between visual quality and performance. The jump from Low to Medium appears to be a worthwhile trade-off for the visual uplift, while the jump from Medium to High costs 15 FPS, which is a significant performance hit for a marginal visual gain on this hardware.

For those who prioritize frame rate above all else, the Low preset at 1080p is the only setting that approaches the 100+ FPS mark. However, the Medium preset at 1080p provides a more balanced experience, and the data indicates it is the highest setting that reliably maintains a frame rate well above 60 FPS. The High preset at 1440p, at 51 FPS, is the best compromise for higher resolution, but it requires accepting a frame rate below the 60 FPS threshold.

GPU Role

The Intel Arc B390 is an integrated graphics processor with a 3 nm process node and a 300 MHz base clock that boosts to 2500 MHz. It features 1536 shading units, 48 texture mapping units, and 24 raster output units. Its memory configuration is "System Shared," meaning it relies on the system's main memory for both capacity and bandwidth, which is described as "System Dependent." This is a critical limitation, as the lack of dedicated VRAM means the GPU is competing with the CPU for memory access, which can introduce latency and bandwidth bottlenecks.

The GPU's benchmark results are telling. It scores 1482 in the 3dmark_3dmark_steel_nomad_dx12 test, which places it in the 9th percentile of all GPUs. Its nearest rivals in the database are the NVIDIA GeForce GT 520MX, GeForce 800M, GeForce GT 625 OEM, and GeForce GT 710, with deltaPct values of 1.3, 1.5, 2.5, and 2.7 respectively. This means the Arc B390 is only about 1-3% faster than these very old, low-end discrete GPUs. This context is crucial: the Arc B390 is not just a weak modern part; it is performance-comparable to entry-level graphics solutions from over a decade ago.

The measured FPS in Doom reflects this. The GPU's FP32 compute is rated at 7.680 TFLOPS, but this raw number does not translate into real-world performance due to the memory constraints and likely driver overhead. The 4K Ultra preset, which stresses the ROPs and memory bandwidth the hardest, yields only 22 FPS. The fact that the 4K Medium preset only improves to 33 FPS shows that the GPU is not compute-bound but rather limited by its memory system and fill rate. The 24 ROPs are a severe bottleneck at 4K, and the system-shared memory with no dedicated bandwidth is a fundamental design constraint that prevents this GPU from scaling effectively.

FAQ

Q: Can this combo run Doom at 4K?

A: Yes, but not playably. At 4K, the average FPS ranges from 22 on Ultra to 37 on Low. The Low preset is the only one that breaks 30 FPS, and even that is below the standard for a smooth experience.

Q: What is the best settings preset for this combo?

A: The Medium preset at 1920x1080 provides the best balance, with an average of 93 FPS and a minimum of 79 FPS. It offers a significant visual improvement over Low while maintaining a frame rate well above 60 FPS.

Q: How does the Arc B390 compare to its nearest rivals?

A: The Arc B390 is about 1.3% faster than the NVIDIA GeForce GT 520MX, 1.5% faster than the GeForce 800M, 2.5% faster than the GeForce GT 625 OEM, and 2.7% faster than the GeForce GT 710 in the 3DMark Steel Nomad test.

Q: Is the Ryzen 9 5950X the bottleneck in this system?

A: No. The benchmark data shows that FPS scales heavily with resolution, which is a classic sign of a GPU bottleneck. The 16-core CPU with its 4.90 GHz boost clock is far more capable than the integrated graphics can utilize in this game.

Q: What is the performance difference between Low and Ultra at 1080p?

A: The average FPS drops from 107 on Low to 64 on Ultra at 1920x1080, a 40.2% decrease in performance for the highest visual quality setting.

Q: How stable are the frame times at 1440p Medium?

A: At 2560x1440 with the Medium preset, the average FPS is 60, with a minimum of 51 and a maximum of 69. This 18 FPS spread between min and max is a moderate variance, but the 60 FPS average is right at the edge of smoothness.

How This Combo Ranks

This specific combination of the AMD Ryzen 9 5950X and the Intel Arc B390 ranks 2580 out of 2930 tested combos for Doom. This places it in the bottom 12% of all configurations tested, which is unsurprising given the GPU's performance percentile. The CPU is a top-tier part, ranking in the 91st percentile of all CPUs, but the GPU is in the 9th percentile, dragging the overall combo ranking down significantly.

The data suggests that this combo is heavily imbalanced. The CPU's performance, as measured by its average benchmark score of 51947, is roughly 35 times higher than the GPU's average benchmark score of 1482. This massive disparity means that the combo's rank is almost entirely determined by the GPU. A system with a much weaker CPU but a dedicated entry-level graphics card would likely outperform this setup in Doom.

The ranking also reflects the fact that the Arc B390 is an integrated solution. Its performance is comparable to discrete GPUs from a different era, as shown by its nearest rivals. In a game like Doom, which is well-optimized and can run on a wide range of hardware, this combo's low rank is a direct consequence of the GPU's inability to handle the rendering workload at higher resolutions and settings. The CPU is essentially waiting on the GPU, and the combo's overall rank suffers as a result.

CPU Role

The AMD Ryzen 9 5950X is a 16-core, 32-thread processor based on the Zen 3 architecture, codenamed Vermeer. It has a base clock of 3.40 GHz and a boost clock of 4.90 GHz, with a 64 MB L3 cache. Its benchmark scores are exceptional: a Cinebench R23 multicore score of 26017 and a single-core score of 1614, a Geekbench multicore score of 15233 and a single-core score of 2083. These numbers place it in the 91st percentile of all CPUs.

However, these capabilities are largely irrelevant for this specific gaming configuration. The measured FPS in Doom is consistently low, and the scaling pattern indicates that the CPU is not the limiting factor. The CPU's role is to feed the GPU with draw calls and game logic, and the Ryzen 9 5950X can do this far faster than the Arc B390 can render frames. The fact that the 1080p Low preset achieves 107 FPS while the 4K Ultra preset achieves only 22 FPS is a clear indication that the CPU is not being stressed.

The CPU's single-thread performance, measured at 944 in the 3dmark_single_thread test and 3470 in Passmark, is more than adequate for Doom's engine. The game primarily relies on a few strong cores, and the Ryzen 9 5950X's high boost clock ensures that those cores are running at full speed. The 32 threads are a massive overprovision for this title, as Doom does not scale well beyond a handful of cores. In essence, the CPU is performing its role flawlessly, but its work is being bottlenecked by the GPU's output.

The data shows that this combo is a case of extreme CPU overkill. The processor's performance is wasted because the integrated GPU cannot keep up. The CPU's nearest rivals, such as the Intel Core i9-13900F and Intel Core i7-14700, have similar average benchmark scores, but when paired with a more capable GPU, they would deliver far better gaming results. In this configuration, the Ryzen 9 5950X is effectively idle, waiting for the Arc B390 to complete its rendering tasks.