Doom

# Doom — AMD Ryzen 5 8400F + Intel Arc B570

The AMD Ryzen 5 8400F paired with the Intel Arc B570 delivers a compelling 1080p and 1440p experience in Doom, with the data showing this combination ranks 2332 out of 2930 tested combos. The 6-core, 12-thread Zen 4 processor with a 4.20 GHz base and 4.70 GHz boost clock works alongside the Arc B570's 10 GB GDDR6 memory and 2500 MHz clock to produce frame rates that are highly playable at lower resolutions, though 4K performance drops notably. This analysis walks through the measured FPS data across resolutions and settings, examines what the numbers reveal about the system's bottlenecks, and places this combo in context against other tested configurations.

Resolution Scaling

The measured FPS data shows a clear and expected pattern: performance degrades as resolution increases, but the rate of degradation reveals important information about where the bottleneck lies. At 1920x1080 with High settings, the combo produces 121 FPS average. Moving to 2560x1440 at the same settings drops the average to 78 FPS, a reduction of 43 FPS or approximately 35.5%. Pushing further to 3840x2160 at High settings yields only 42 FPS average, which is a 79 FPS drop from 1080p — a 65.3% reduction.

This scaling pattern strongly indicates that the Intel Arc B570 becomes the limiting factor as resolution climbs. The GPU's 10 GB GDDR6 memory and 160-bit bus with 380.0 GB/s bandwidth must handle progressively larger frame buffers, and the 11.52 TFLOPS FP32 compute is strained at 4K. The Ryzen 5 8400F's 16 MB shared L3 cache and 83.2 GB/s memory bandwidth are more than sufficient to feed the GPU at lower resolutions, but the GPU's rendering throughput cannot sustain high frame rates at 4K.

Looking at the Low settings row, the scaling is even more revealing. At 1080p Low, the combo hits 164 FPS average. At 1440p Low, it drops to 106 FPS (a 35.4% reduction), and at 4K Low, it falls to 57 FPS (a 65.2% reduction from 1080p). The consistency of these percentage drops across settings suggests a GPU-bound scenario where the Arc B570's pixel rate of 200.0 GPixel/s and texture rate of 360.0 GTexel/s dictate the ceiling. The 80 ROPs and 144 TMUs are fixed hardware resources that cannot scale with lower settings — they simply run out of throughput at higher pixel counts.

The Medium settings data includes min and max FPS values, providing additional insight. At 1080p Medium, the average is 143 FPS with a min of 121 and max of 164. At 1440p Medium, the average drops to 92 FPS with min 79 and max 106. At 4K Medium, the average is 50 FPS with min 43 and max 58. The gap between min and max FPS widens slightly at higher resolutions (43 FPS spread at 1080p vs 15 FPS spread at 4K), indicating that frame time consistency actually improves as the GPU becomes more uniformly saturated — there is less headroom for spikes when the GPU is fully loaded.

Settings Recommendations

The measured data provides clear guidance on which preset offers the best experience at each resolution. At 1920x1080, all four settings presets produce playable frame rates, but the choice depends on whether the user prioritizes visual quality or raw performance. Ultra settings deliver 99 FPS average, which is perfectly smooth for a fast-paced FPS like Doom. High settings offer 121 FPS, Medium 143 FPS, and Low 164 FPS. The jump from Ultra to High costs only 22 FPS but likely provides a meaningful reduction in visual effects; the jump from High to Medium costs another 22 FPS.

At 2560x1440, the data suggests High settings at 78 FPS is the sweet spot. Ultra drops to 64 FPS, which may still be acceptable but leaves less margin for demanding scenes. Medium runs at 92 FPS and Low at 106 FPS, but the visual trade-off at 1440p for those extra frames may not be worth it given that High already clears the 60 FPS threshold comfortably. The 78 FPS average at High settings leaves headroom above the 60 FPS minimum that many players consider the floor for a responsive shooter.

At 3840x2160, the situation is more constrained. Ultra settings produce only 35 FPS average, which is below the threshold for smooth gameplay in a fast-action FPS. High settings at 42 FPS are marginal at best. Medium settings at 50 FPS with a min of 43 FPS may be playable for less demanding players, but the data suggests that Low settings at 57 FPS is the only preset that consistently stays near playable territory. Even then, 57 FPS is below the 60 FPS target, and the lack of min/max data for Low settings means frame dips could push it lower.

For the best overall experience, the data points to High settings at 1080p or 1440p. At 1080p, High delivers 121 FPS, which is well above the refresh rate of most standard monitors and provides a smooth, responsive experience. At 1440p, High at 78 FPS offers a good balance of visual fidelity and performance, staying comfortably above 60 FPS. Players with 4K displays should consider Low settings to stay near 57 FPS, or accept Medium at 50 FPS if visual quality is paramount.

GPU Role

The Intel Arc B570's specifications directly explain the measured performance profile in Doom. The GPU features 2304 shading units, 144 TMUs, and 80 ROPs, with a boost clock of 2500 MHz. The 10 GB GDDR6 memory operates at 2375 MHz with a 19 Gbps effective rate, delivering 380.0 GB/s bandwidth across a 160-bit bus. These specifications place the Arc B570 at the 65th percentile compared to all GPUs in the benchmark database, with an average benchmark score of 20556.

The nearest rivals for the Arc B570 provide context for its expected performance level. The NVIDIA GeForce RTX 3070 Mobile scores 20534, a 0.1% delta, making it essentially a performance peer. The Intel Arc A750 scores 20582, a -0.1% delta, indicating the B570 is a slight improvement over its predecessor. The NVIDIA Quadro M4000M and AMD Radeon R9 M390X also fall within 0.4-0.5% of the B570's average score. These close margins suggest the Arc B570 occupies a specific performance tier, and the Doom results align with this positioning.

In Doom specifically, the GPU's 11.52 TFLOPS FP32 compute and 200.0 GPixel/s pixel rate are the key drivers of frame rate. The game's fast-paced rendering demands high fill rates, and the 80 ROPs handle the pixel output. At 4K Ultra, the 35 FPS average reflects the GPU being pushed to its absolute limit — the 8.3 million pixels per frame at 3840x2160 overwhelm the pixel pipeline. The 360.0 GTexel/s texture rate is equally important for Doom's detailed environments, and the 144 TMUs do their part at lower resolutions but saturate at 4K.

The 10 GB VRAM capacity is sufficient for Doom at all tested settings, as the game's 2016 release date means it does not require the large memory footprints of modern titles. The 380.0 GB/s bandwidth provides adequate data throughput for the frame buffer at 1080p and 1440p, but at 4K the combination of higher resolution textures and larger frame buffers begins to strain the memory subsystem. The 160-bit bus width is narrower than many competing GPUs, which contributes to the significant performance drop at 4K.

FAQ

Q: What is the best resolution to play Doom with this CPU/GPU combo?

A: The data shows 1920x1080 at High settings delivers 121 FPS average, which is the best balance of visual quality and performance. At 2560x1440, High settings still achieve 78 FPS, making both resolutions viable. 3840x2160 only reaches 57 FPS at Low settings, so 4K is not recommended for smooth gameplay.

Q: How does the Intel Arc B570 compare to its closest rivals?

A: The Arc B570 has an average benchmark score of 20556, placing it at the 65th percentile of all GPUs. Its nearest rival, the NVIDIA GeForce RTX 3070 Mobile, scores 20534 (0.1% delta), while the Intel Arc A750 scores 20582 (-0.1% delta). The NVIDIA Quadro M4000M and AMD Radeon R9 M390X also fall within 0.4-0.5% of its score.

Q: Does the Ryzen 5 8400F bottleneck the Arc B570 in Doom?

A: At 1080p, the CPU's 6 cores and 12 threads with a 4.70 GHz boost clock are sufficient to keep up with the GPU, as evidenced by 164 FPS at Low settings. The bottleneck shifts to the GPU at higher resolutions, with 4K performance dropping 65.3% from 1080p at High settings, indicating the GPU is the limiting factor.

Q: What frame rate can I expect at 1440p with Medium settings?

A: The measured data shows 92 FPS average at 2560x1440 with Medium settings, with a minimum of 79 FPS and maximum of 106 FPS. This provides a smooth experience with a 27 FPS spread between min and max, indicating consistent frame times.

Q: How does this combo rank among all tested combinations?

A: This combo ranks 2332 out of 2930 total tested combinations in Doom. This places it in the lower portion of the ranking, reflecting the Arc B570's mid-tier performance level rather than a CPU limitation.

Q: Is Ultra settings viable at any resolution?

A: At 1080p, Ultra settings deliver 99 FPS average, which is playable. At 1440p, Ultra drops to 64 FPS, which is marginal but above 60 FPS. At 4K, Ultra produces only 35 FPS, which is not recommended for a fast-paced FPS.

CPU Role

The AMD Ryzen 5 8400F provides the computational foundation for this combo, and its specifications explain why it does not become the primary bottleneck in Doom. The CPU features 6 cores and 12 threads based on the Zen 4 architecture, codenamed Phoenix, manufactured on TSMC's 4 nm process node. The base clock of 4.20 GHz boosts up to 4.70 GHz, and the 16 MB shared L3 cache (with 1 MB L2 per core and 64 KB L1 per core) provides adequate data locality for game workloads. The 65W TDP and DDR5 memory support with 83.2 GB/s bandwidth round out the platform.

The CPU's benchmark scores show it performs at the 77th percentile compared to all CPUs, with an average benchmark score of 25005. Its nearest rivals are all within 0.4% of its score: the AMD Ryzen 5 7500F at 24964 (0.2% delta), Intel Core i7-11850H at 24935 (0.3% delta), Intel Core i7-13620H at 24911 (0.4% delta), and AMD EPYC 9474F at 25103 (-0.4% delta). This indicates the 8400F sits in a tightly contested performance tier where single-digit score differences separate competitors.

In Doom specifically, the CPU's role is to feed the GPU with draw calls and game logic. The 3DMark multi-threaded scores show scaling from 1874 at 2 threads to 6165 at max threads, indicating the 6-core/12-thread configuration handles multi-threaded workloads effectively. The Cinebench R23 multi-core score of 20851 and single-core score of 2943 demonstrate strong per-thread performance, which is critical for Doom's main game thread. The PassMark single-thread score of 3685 further confirms robust single-core capability.

The evidence that the CPU is not the bottleneck comes from the resolution scaling data. At 1080p Low, the combo achieves 164 FPS, which is likely near the CPU's practical limit for this game. Yet at 1080p Ultra, the frame rate drops to 99 FPS, and at 4K Ultra it falls to 35 FPS. If the CPU were the limiting factor, frame rates would remain relatively constant across resolutions. Instead, the 65.3% drop from 1080p to 4K at High settings shows the GPU's rendering throughput is the constraining resource. The CPU's 83.2 GB/s memory bandwidth and 16 MB L3 cache are sufficient to avoid starving the GPU at lower resolutions.

Measured FPS Breakdown

The complete measured FPS dataset for this combo in Doom provides a comprehensive picture of performance across all resolution and settings combinations.

At 1920x1080, the combo delivers its strongest results. Low settings produce 164 FPS average, which is the highest frame rate in the entire dataset. Medium settings run at 143 FPS with a minimum of 121 and maximum of 164, showing a 43 FPS variance. High settings achieve 121 FPS average, and Ultra settings drop to 99 FPS. The progression from Low to Ultra shows a 65 FPS total reduction, with each settings tier costing roughly 20-22 FPS. This linear scaling suggests the GPU has headroom at 1080p, and the CPU is capable of driving even higher frame rates if the GPU could deliver them.

At 2560x1440, performance remains solid but begins to show the GPU's limitations. Low settings produce 106 FPS, Medium runs at 92 FPS (min 79, max 106), High achieves 78 FPS, and Ultra drops to 64 FPS. The delta between Low and Ultra is 42 FPS, smaller than at 1080p, indicating the GPU is becoming more of a limiting factor. The Medium settings data shows a 27 FPS spread between min and max, tighter than at 1080p, suggesting more consistent frame pacing as the GPU approaches saturation.

At 3840x2160, the GPU is clearly the bottleneck. Low settings produce 57 FPS, Medium runs at 50 FPS (min 43, max 58), High achieves 42 FPS, and Ultra drops to 35 FPS. The delta between Low and Ultra is only 22 FPS, much smaller than at lower resolutions. The Medium settings min of 43 FPS and max of 58 FPS show a 15 FPS variance, the tightest spread in the dataset, indicating the GPU is running consistently at its limit. The 4K results show that even at Low settings, the combo barely maintains 57 FPS, and any demanding scene could push it below playable thresholds.

How This Combo Ranks

The combo rank in Doom places this configuration at 2332 out of 2930 tested combinations, putting it in the bottom 20.4% of all tested systems. This ranking reflects the Intel Arc B570's position as a mid-tier GPU rather than any deficiency in the Ryzen 5 8400F. The CPU's 77th percentile ranking among all CPUs contrasts with the GPU's 65th percentile ranking, suggesting the GPU is the weaker component in this pairing for this game.

The rank becomes more meaningful when considered alongside the measured FPS data. At 1080p High, the combo produces 121 FPS, which is a smooth, highly playable experience for a fast-paced FPS. At 1440p High, 78 FPS remains above the 60 FPS threshold. These results would typically place a system much higher in the rankings, but the large number of tested combos (2930) includes many high-end configurations with flagship GPUs that push the rank down.

The GPU's nearest rivals provide context for the ranking. The Arc B570's average benchmark score of 20556 is within 0.1% of the RTX 3070 Mobile and Arc A750, placing it in a specific performance tier. In Doom, the 4K Ultra result of 35 FPS highlights the GPU's limitations at extreme resolutions, which is a significant factor in the combo's rank. Systems ranked above this combo likely feature GPUs with higher fill rates and more memory bandwidth, allowing them to maintain higher frame rates at 4K.

The CPU's strong benchmark position — 77th percentile with a 25005 average score — suggests that pairing the Ryzen 5 8400F with a more powerful GPU would yield significantly better rankings in Doom. The 8400F's ability to drive 164 FPS at 1080p Low indicates it has headroom for more demanding GPUs, and its 6-core/12-thread configuration with 4.70 GHz boost is well-suited for gaming workloads. The data overall shows a balanced system that performs well at mainstream resolutions but falls behind in the 4K segment, which is the primary driver of its 2332 rank among 2930 tested combos.