Doom

The AMD Ryzen 7 5700X3D paired with the Intel Arc B390 produces a starkly CPU-bound profile in Doom, but the data reveals that the integrated GPU becomes the decisive bottleneck as resolution climbs. The measured frame rates show a clear hierarchy where the 8-core, 16-thread processor has ample headroom, while the Arc B390's system-shared memory and modest execution resources cap performance well below the refresh rates the CPU could otherwise support.

Resolution Scaling

The frame rate deltas between 1080p and 4K are dramatic and expose the GPU as the limiting component at higher resolutions. At Low settings, the average FPS drops from 107 at 1920x1080 to 69 at 2560x1440, a reduction of 38 FPS. Pushing to 3840x2160 at Low yields just 37 average FPS, meaning the 4K result is roughly 65% lower than the 1080p figure. This scaling pattern is typical of a GPU that runs out of pixel throughput, not a CPU that runs out of threads.

The Medium preset tells the same story with slightly less amplitude. Average FPS goes from 93 at 1080p to 60 at 1440p, then to 33 at 4K. The gap between 1440p and 4K is 27 FPS, which is nearly identical to the 33 FPS gap between 1080p and 1440p. This consistent degradation across every step-up indicates that the Arc B390's shading units and ROPs are saturated by the increasing pixel count. The High preset follows suit: 78 FPS at 1080p, 51 at 1440p, and 28 at 4K.

Ultra settings amplify the bottleneck further. The 1080p Ultra average of 64 FPS drops to 41 at 1440p and 22 at 4K. The 4K Ultra result of 22 FPS is barely playable, and the data suggests that the GPU's 24 ROPs and 48 TMUs are overwhelmed by the combination of high resolution and heavy shading. The measured min and max FPS at Medium settings corroborate this: at 4K Medium, the range is 28 to 37 FPS, while at 1080p Medium it is 79 to 107 FPS. The wide spread at 1080p indicates that some frames are much lighter on the GPU, allowing bursts of speed, but the ceiling is firmly set by the integrated graphics.

The scaling behavior is consistent with a system where the CPU is never the primary constraint. If the Ryzen 7 5700X3D were the limiting factor, the 4K results would not be so much lower than 1080p; instead, the CPU would cap all resolutions at a similar frame rate. The data shows the opposite, with a near-linear relationship between pixel count and performance loss. This is a classic GPU-bound signature, and it means that users targeting 4K will need to accept Low or Medium settings to approach playable frame rates.

CPU Role

The Ryzen 7 5700X3D brings substantial compute resources to this pairing. Its 8 cores and 16 threads are built on the Zen 3 architecture, codenamed Vermeer, and the chip boosts to 4.10 GHz from a base of 3.00 GHz. The 96 MB of shared L3 cache is the headline feature, and it pays dividends in Doom, a game that responds well to large cache pools. The CPU's benchmark scores confirm its strength: Cinebench R23 multi-core hits 22,366, and single-core reaches 3,157. Geekbench scores are 11,086 multi-core and 1,849 single-core.

The processor's percentile ranking of 77 among all CPUs indicates it sits comfortably above average, and its nearest rivals are telling. The AMD Ryzen 5 7600X3D is only 0.1% faster in average benchmark score, while the Intel Core i5-12450HX and Intel Core i5-11600 are 0.5% and 0.6% slower, respectively. This means the 5700X3D is essentially a peer of the 7600X3D, and any frame rate differences in Doom at 1080p Low are more likely attributable to GPU variance than CPU capability.

In Doom, the CPU's role is to feed the GPU with draw calls and physics updates. The game's id Tech 6 engine scales well with multiple threads, and the 16 threads on this chip are more than sufficient to keep the Arc B390 busy at 1080p. The data supports this: at 1080p Low, the average FPS of 107 is likely near the GPU's maximum, not the CPU's. The single-threaded performance, as measured by 3DMark single-thread score of 804, is adequate for the game's main game thread, and the multi-threaded scores show no sign of a starvation issue.

The 105 W TDP and 7 nm TSMC process node mean the CPU runs efficiently, but that is incidental to the frame rate analysis. The key takeaway is that the Ryzen 7 5700X3D is not the component dragging down performance in this configuration. Even at 4K Ultra, where the average FPS falls to 22, the CPU has enough headroom to render more frames if the GPU could produce them. The 96 MB L3 cache is particularly beneficial for Doom's texture streaming and geometry processing, which helps maintain consistent frame times at lower resolutions. At 1080p Medium, the minimum FPS of 79 suggests the CPU is keeping up with the GPU's output, as the bottleneck shifts to pixel processing rather than thread scheduling.

GPU Role

The Intel Arc B390 is the clear performance limiter in this combo. Its specifications are modest for a 2026 release: 1,536 shading units, 48 TMUs, and 24 ROPs, with a boost clock of 2500 MHz. The GPU's 3DMark Steel Nomad DX12 score of 1,482 places it in the 9th percentile among all GPUs, which is extremely low. The nearest rivals are ancient NVIDIA parts: the GeForce GT 520MX is 1.3% faster, the GeForce 800M is 1.5% faster, and the GeForce GT 625 OEM is 2.5% faster. The GT 710 is 2.7% faster. This is not a GPU built for high-refresh gaming; it is an integrated part designed for basic graphics tasks.

The memory configuration is "System Shared," meaning the GPU uses the CPU's DDR4 memory with bandwidth that is "System Dependent." This is a critical weakness for Doom, which has large textures and requires fast memory access. The system's dual-channel DDR4 at 51.2 GB/s is shared between the CPU and GPU, and at 4K, the texture bandwidth demand likely exceeds what the shared memory can provide. The GPU's FP32 throughput of 7.680 TFLOPS sounds capable on paper, but the 60.00 GPixel/s pixel rate and 120.0 GTexel/s texture rate are the figures that matter for Doom's rendering. At 4K, the pixel rate is the hard ceiling, and the measured 28 FPS at High settings suggests the GPU is hitting that wall.

The 3 nm Intel process node and Xe3-LPG architecture are modern, but the chip is clearly cut down for mobile or low-power integration. The 80 W TDP and "IGP" slot width confirm this is not a discrete card. The GPU's DirectX 12 Ultimate support (12_2) is irrelevant when the raw fill rate is so low. The 12 RT cores are present but unused in Doom, which is a rasterization-heavy title. The data shows that the GPU's performance scales poorly with resolution, and the Ultra preset at 4K yields just 22 FPS, which is below the threshold for comfortable play.

The Arc B390's boost clock of 2500 MHz is high, but it cannot compensate for the low ROP and TMU counts. At 1080p, the GPU manages 107 FPS at Low, which is decent, but the frame rate collapses as resolution increases. The GPU's benchmark percentile of 9 means it is in the bottom tenth of all GPUs, and the measured Doom results align with that ranking. For this game, the GPU is the bottleneck at every resolution above 1080p Low, and even at 1080p, it is likely the limiting factor once settings rise above Low.

How This Combo Ranks

The combination of the Ryzen 7 5700X3D and Arc B390 ranks 2580 out of 2930 tested combos in Doom. This places it in the bottom 12% of all configurations, which is a poor showing for a CPU that ranks in the 77th percentile. The disconnect between the CPU's strength and the GPU's weakness is stark. The combo's rank is dragged down almost entirely by the GPU, as the CPU has the computational power to support much higher frame rates.

The ranking suggests that this pairing is mismatched. The Ryzen 7 5700X3D is a capable gaming CPU, as evidenced by its near-tie with the Ryzen 5 7600X3D and its superiority to the Intel Core i5-12450HX and i5-11600. However, the Arc B390's 9th percentile GPU ranking means the combo cannot leverage the CPU's capabilities. In the context of the 2,930 tested combos, this pairing falls below the median, and the data indicates that any user expecting smooth Doom performance would need to either lower resolution dramatically or upgrade the GPU.

The combo rank is consistent with the resolution scaling data. At 1080p Low, the system produces 107 FPS, which is playable, but the rank reflects performance across all settings and resolutions. The 4K Ultra result of 22 FPS is a significant drag on the average. The data shows that the combo is best suited for 1080p gaming, and even then, only at Low or Medium settings. The gap between the CPU's potential and the GPU's delivery is the defining characteristic of this pairing, and the rank of 2580 out of 2930 quantifies that gap.

Settings Recommendations

Based on the measured FPS rows, the optimal settings for this combo depend on the target resolution. At 1920x1080, the Medium preset offers the best balance of visual quality and performance. The average FPS of 93 at Medium is only 14 FPS lower than Low (107), but the visual upgrade from Low to Medium is substantial in Doom. The minimum FPS at Medium is 79, which is above the 60 FPS threshold for smooth play, and the maximum of 107 matches the Low preset's average. High at 1080p drops to 78 FPS, which is still playable, but the 15 FPS penalty over Medium is not worth the incremental visual gains. Ultra at 1080p yields 64 FPS, which is borderline for a fast-paced FPS, and the drop from Medium to Ultra is 29 FPS.

At 2560x1440, the Low preset is the only reasonable choice if fluidity is the priority. The Low average of 69 FPS is playable, while Medium drops to 60 FPS, which is below the ideal for competitive play. High at 51 FPS and Ultra at 41 FPS are too slow for a game that rewards quick reactions. The data shows that 1440p is the upper limit for this combo, and even then, only at Low settings. The 69 FPS at Low is the best result at this resolution, and it comes with the lowest visual fidelity.

At 3840x2160, the situation is grim. The Low preset's 37 FPS is the only setting above 30 FPS, and even that is not smooth. Medium averages 33 FPS, High drops to 28, and Ultra falls to 22. None of these are recommendable for actual play, but if 4K is mandatory, Low is the least bad option. The minimum FPS at 4K Medium is 28, which indicates significant frame time spikes. For most users, the data suggests sticking to 1080p Medium or 1440p Low to maintain a playable experience.

Measured FPS Breakdown

At 1920x1080, the measured averages are as follows: Low 107 FPS, Medium 93 FPS, High 78 FPS, and Ultra 64 FPS. The Medium preset has a measured minimum of 79 FPS and a maximum of 107 FPS, showing a 28 FPS variance. The Low and High presets do not have min/max values in the data, but the averages alone indicate a clear step-down from Low to Ultra.

At 2560x1440, the averages are: Low 69 FPS, Medium 60 FPS, High 51 FPS, and Ultra 41 FPS. The Medium preset shows a minimum of 51 FPS and a maximum of 69 FPS, which mirrors the Low average at this resolution. This suggests that Medium at 1440p is roughly equivalent to Low in terms of frame delivery, but with better visuals.

At 3840x2160, the averages are: Low 37 FPS, Medium 33 FPS, High 28 FPS, and Ultra 22 FPS. The Medium preset has a minimum of 28 FPS and a maximum of 37 FPS, which exactly matches the Low average. This indicates that the GPU is so saturated at 4K that the difference between Low and Medium is minimal, and the frame rate is pinned to the GPU's pixel output limit. Across all resolutions, the trend is consistent: the Arc B390 delivers roughly 40-50% more FPS at 1080p Low than at 4K Low, and the gap widens at higher settings. The data confirms that this combo is only suitable for 1080p gaming, with 1440p as a stretch goal at Low settings.