Fortnite

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The measured FPS data for Fortnite with the AMD Ryzen 7 5700 and Intel Arc B570 reveals a steep and consistent performance cliff as resolution climbs. At 1080p Low, the combo delivers 176 FPS average; at 1440p Low, that falls to 112 FPS; and at 4K Low, it drops to 59 FPS. That is a 66% reduction in average FPS from 1080p to 4K at Low settings, which strongly indicates the GPU becomes the dominant bottleneck as pixel count rises. The CPU is not the limiting factor at higher resolutions — the data shows the Arc B570’s rendering throughput simply cannot keep pace with the pixel workload.

Looking at the High preset, the scaling pattern is even more pronounced. At 1080p High, the combo achieves 96 FPS. At 1440p High, it drops to 61 FPS. At 4K High, it collapses to 32 FPS. The 1440p-to-4K transition is particularly brutal: a 47.5% FPS loss. This is not a gradual degradation — it is a cliff. The Arc B570, with its 10 GB of GDDR6 memory and 160-bit bus, appears to run out of memory bandwidth and raw shading throughput when asked to fill 8.3 million pixels per frame.

The Medium preset tells a similar story, but with min FPS data that adds nuance. At 1080p Medium, the average is 124 FPS with min 106 and max 143. At 1440p Medium, the average drops to 79 FPS with min 67 and max 91. At 4K Medium, the average falls to 42 FPS with min 35 and max 48. The min-max spread narrows as resolution increases — from a 37 FPS range at 1080p to a 13 FPS range at 4K. This tightening suggests that at 4K, the system is consistently hitting a hard performance wall, likely GPU-bound, rather than experiencing occasional CPU-induced stutters.

Ultra settings are nearly unplayable at 4K, with an average of just 21 FPS. At 1080p Ultra, the combo still manages 64 FPS, but at 1440p Ultra it falls to 40 FPS. The Ultra preset at 4K is the worst-case scenario: the data shows a 67% drop from 1080p Ultra to 4K Ultra. This is not a configuration meant for competitive play at 4K — it is a slideshow.

The resolution scaling analysis points to a clear conclusion: the Intel Arc B570 is the limiting component at 1440p and 4K, while the Ryzen 7 5700’s 8-core, 16-thread Zen 3 architecture has ample headroom. The CPU’s 3.70 GHz base and 4.60 GHz boost clocks, combined with its 16 MB of L3 cache, are more than sufficient to feed the GPU at lower resolutions. The fact that 1080p Low hits 176 FPS while 4K Low manages only 59 FPS — a resolution increase of 4x leading to a 3x FPS drop — is textbook GPU-bound behavior.

How This Combo Ranks — use comboRankInGame vs other tested combos

The AMD Ryzen 7 5700 + Intel Arc B570 combination ranks 2178 out of 2740 tested combos in Fortnite. That places it in the 20.5th percentile of all tested combinations — meaning roughly 79.5% of tested combos perform better in this game. This is a low-to-mid ranking, but it is important to contextualize this against the individual component performance.

The CPU alone sits at the 78th percentile against all CPUs, with an average benchmark score of 25517. Its nearest rivals are the Intel Xeon D-2752TER (25530, -0.1% delta), AMD Ryzen 5 7640U (25485, +0.1% delta), AMD Ryzen 5 6600H (25550, -0.1% delta), and AMD Ryzen 7 5825U (25446, +0.3% delta). This shows the Ryzen 7 5700 is a solid mid-to-upper-tier CPU, essentially tied with these rivals in synthetic benchmarks. The CPU is not the weak link.

The GPU, however, sits at the 65th percentile against all GPUs, with an average benchmark score of 20556. Its nearest rivals are the NVIDIA GeForce RTX 3070 Mobile (20534, +0.1% delta), Intel Arc A750 (20582, -0.1% delta), NVIDIA Quadro M4000M (20480, +0.4% delta), and AMD Radeon R9 M390X (20662, -0.5% delta). The Arc B570 is essentially performance-identical to these rivals in synthetic tests, but the combo rank in Fortnite suggests the game’s specific rendering demands penalize this GPU more than synthetic benchmarks would predict.

The gap between the CPU’s 78th percentile and the GPU’s 65th percentile explains why the combo lands at the 20.5th percentile overall. The data shows that in Fortnite, the GPU is the constraining factor, and the Arc B570’s relatively modest standing among GPUs drags the combo down. The CPU has headroom to spare — it is not the bottleneck. This is a case where the whole is less than the sum of its parts: a top-quartile CPU paired with a mid-tier GPU results in a bottom-quartile gaming combo for this particular title.

Settings Recommendations — which preset gives the best experience per the measured rows

The measured FPS data provides clear guidance on which settings preset delivers the best experience for different resolution targets. The key question is whether the user prioritizes frame rate smoothness, visual fidelity, or a balance of both.

For 1080p gaming, the Low preset at 176 FPS is the clear choice for competitive play. This exceeds the 144 Hz refresh rate common on modern monitors, and the frame rate headroom means the CPU is not being stressed. The Medium preset at 124 FPS is also viable for players who want some visual improvement without sacrificing too much smoothness — 124 FPS still comfortably exceeds 120 Hz. High at 96 FPS is playable but marginal for high-refresh displays. Ultra at 64 FPS is the worst choice at 1080p — the visual gains over High are minimal relative to the 33% FPS loss.

For 1440p gaming, the recommended preset is Medium at 79 FPS average. This is the only preset that breaks the 75 FPS threshold at this resolution. Low at 112 FPS is excellent for competitive play, but Medium offers a meaningful visual upgrade while staying above 60 FPS. High at 61 FPS is borderline — it is playable but will suffer from occasional frame pacing issues. Ultra at 40 FPS is not recommended for any serious play.

For 4K gaming, the data is stark: only Low at 59 FPS is playable. Medium at 42 FPS is a slideshow, High at 32 FPS is unplayable, and Ultra at 21 FPS is a screenshot generator. At 4K, the user must accept Low settings to achieve anything resembling smooth gameplay. The 4K Low result of 59 FPS is barely above the 60 FPS standard, so even this preset will feel inconsistent.

The best overall experience, balancing visual quality and frame rate, is 1440p Medium. It delivers 79 FPS average with a min of 67 FPS — the minimum never drops below 60, ensuring no major stutters. The 1080p Medium preset at 124 FPS with min 106 is the best choice for high-refresh monitors, while 1440p Low at 112 FPS is the best competitive option at a higher resolution.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

The measured FPS data is presented in full below, organized by resolution and settings preset.

1920x1080:

• Low: 176 FPS average
• Medium: 124 FPS average, 106 FPS min, 143 FPS max
• High: 96 FPS average
• Ultra: 64 FPS average

2560x1440:

• Low: 112 FPS average
• Medium: 79 FPS average, 67 FPS min, 91 FPS max
• High: 61 FPS average
• Ultra: 40 FPS average

3840x2160:

• Low: 59 FPS average
• Medium: 42 FPS average, 35 FPS min, 48 FPS max
• High: 32 FPS average
• Ultra: 21 FPS average

The 1080p to 1440p transition shows a consistent FPS reduction across all settings: Low drops from 176 to 112 (36% loss), Medium from 124 to 79 (36% loss), High from 96 to 61 (36% loss), and Ultra from 64 to 40 (37.5% loss). This uniformity suggests a consistent scaling factor — the pixel count increase from 2.07 million to 3.69 million (78% more pixels) results in roughly a 36-37% FPS drop across all presets.

The 1440p to 4K transition is less uniform. Low drops from 112 to 59 (47% loss), Medium from 79 to 42 (47% loss), High from 61 to 32 (47.5% loss), and Ultra from 40 to 21 (47.5% loss). The pixel count increase from 3.69 million to 8.29 million (125% more pixels) results in a 47-47.5% FPS drop. The larger percentage loss at 4K compared to 1440p indicates the GPU is hitting a more severe bottleneck — likely memory bandwidth exhaustion, as the 160-bit bus and 380.0 GB/s bandwidth struggle to feed the massive 4K frame buffer.

The Medium preset is the only one with min and max FPS data across all three resolutions. The min FPS values — 106 at 1080p, 67 at 1440p, and 35 at 4K — show that even the worst-case frames are 60+ at 1080p, 60+ at 1440p, but far below 60 at 4K. The max FPS values — 143 at 1080p, 91 at 1440p, and 48 at 4K — show that the best-case frames at 4K cannot even reach 50 FPS.

FAQ

Q: What is the best resolution for this combo in Fortnite?

A: The data shows 1080p is the only resolution where the combo consistently exceeds 60 FPS across all settings. At 1080p Low, it achieves 176 FPS average, and even Ultra hits 64 FPS. At 1440p, only Low and Medium exceed 60 FPS (112 and 79 FPS respectively). At 4K, only Low reaches 59 FPS.

Q: Is the CPU or GPU the bottleneck in Fortnite?

A: The resolution scaling data strongly indicates the GPU is the bottleneck at 1440p and 4K. The CPU ranks at the 78th percentile with an average benchmark score of 25517, while the GPU ranks at the 65th percentile. The FPS drops of 36-37% from 1080p to 1440p and 47-47.5% from 1440p to 4K are consistent with GPU-bound behavior, not CPU limitations.

Q: How does this combo compare to its nearest rivals in synthetic benchmarks?

A: The CPU is nearly identical to its nearest rivals: it is 0.1% slower than the Intel Xeon D-2752TER and AMD Ryzen 5 6600H, and 0.1% and 0.3% faster than the AMD Ryzen 5 7640U and AMD Ryzen 7 5825U respectively. The GPU is 0.1% faster than the NVIDIA GeForce RTX 3070 Mobile and NVIDIA Quadro M4000M, and 0.1% and 0.5% slower than the Intel Arc A750 and AMD Radeon R9 M390X.

Q: Is 4K gaming viable with this setup?

A: The data shows only 4K Low (59 FPS average) is playable. 4K Medium drops to 42 FPS, 4K High to 32 FPS, and 4K Ultra to 21 FPS. The 4K Low result is barely above 60 FPS and will have frame pacing issues. For consistent smooth gameplay, 1440p Medium at 79 FPS is the highest resolution and preset combination that maintains a comfortable margin above 60 FPS.

Q: What is the combo's rank among all tested combinations in Fortnite?

A: The combo ranks 2178 out of 2740 tested combos, placing it in the 20.5th percentile. This is low relative to the CPU's 78th percentile ranking, confirming that the GPU holds back the overall gaming performance in Fortnite.

Q: How does the CPU's single-thread performance compare to its multi-thread performance?

A: The CPU scores 901 in 3dmark single-thread, 1762 in 3dmark 2-thread, 3382 in 3dmark 4-thread, 5585 in 3dmark 8-thread, and 6617 in 3dmark max-thread. The Cinebench R23 scores are 2916 single-core and 20655 multi-core. The scaling from single-thread to 8-thread is nearly linear (901 to 5585, a 6.2x increase for 8x threads), indicating the Zen 3 architecture is well-utilized in multi-threaded workloads.

CPU Role — cores, clocks, and how they relate to this game's results

The AMD Ryzen 7 5700 brings 8 cores and 16 threads based on the Zen 3 architecture, built on TSMC's 7 nm process. Its base clock is 3.70 GHz with a boost clock of 4.60 GHz, and it has a 65 W TDP. The cache hierarchy includes 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 16 MB of L3 cache. This is a Cezanne-generation desktop processor with a die size of 180 mm² and 10,700 million transistors.

In Fortnite, the CPU's role is to handle game logic, physics, and draw call submission. The 8-core, 16-thread configuration is more than sufficient for this game, which typically scales well up to 4-6 threads. The CPU's 78th percentile ranking against all CPUs, with an average benchmark score of 25517, confirms it is a strong processor. Its nearest rival, the Intel Xeon D-2752TER, scores 25530 — a negligible 0.1% difference.

The CPU's memory bandwidth of 51.2 GB/s via dual-channel DDR4 is adequate for feeding the GPU, but at 4K resolutions the GPU's own memory bandwidth (380.0 GB/s on the Arc B570) becomes the limiting factor. The CPU's 16 MB of L3 cache is large enough to hold Fortnite's working set, reducing the need for frequent main memory accesses.

The benchmark data shows the CPU scales well with thread count: 3dmark scores go from 901 single-thread to 6628 16-thread (a 7.4x increase for 16x threads). The Cinebench R23 multi-core score of 20655 is strong, and the single-core score of 2916 is respectable. In Fortnite, the CPU is not the bottleneck — the FPS drops from 1080p to 4K are far too steep to be CPU-caused. The CPU has headroom to push higher frame rates if the GPU were more powerful.

GPU Role — VRAM, clocks, and how they relate to this game's results

The Intel Arc B570 is built on the Xe2-HPG architecture (Battlemage generation) using TSMC's 5 nm process. It has 2304 shading units, 144 texture mapping units, and 80 raster output pipelines, along with 18 ray tracing cores. The GPU runs at a fixed 2500 MHz base and boost clock, with memory clocked at 2375 MHz (19 Gbps effective). It features 10 GB of GDDR6 memory on a 160-bit bus, providing 380.0 GB/s of memory bandwidth.

The GPU's 65th percentile ranking against all GPUs, with an average benchmark score of 20556, places it as a mid-tier performer. Its nearest rival, the Intel Arc A750, scores 20582 — a 0.1% difference. The NVIDIA GeForce RTX 3070 Mobile scores 20534, also a 0.1% difference. This shows the Arc B570 is squarely in the mid-range GPU tier.

In Fortnite, the GPU's role is to render the battle royale world — building structures, rendering distant landscapes, and handling particle effects. The 10 GB VRAM is ample for Fortnite at 1080p and 1440p, but at 4K Ultra the combination of high-resolution textures and demanding effects may stress the memory subsystem. The 160-bit bus width is narrow for a 4K-focused GPU, and the 380.0 GB/s bandwidth is the likely culprit behind the steep FPS drops at 4K.

The GPU's fixed 2500 MHz clock means it does not boost dynamically, which is unusual. The FP32 performance of 11.52 TFLOPS and the pixel rate of 200.0 GPixel/s provide context for its rendering capability. The texture rate of 360.0 GTexel/s is moderate, which explains why High and Ultra settings at 4K (which require heavy texture filtering) perform so poorly.

The Arc B570's ray tracing cores (18 total) are not heavily utilized in Fortnite's default settings, but the game's performance at 4K suggests the GPU is simply overwhelmed by the pixel workload. The 47% FPS drop from 1440p to 4K across all settings is a clear sign that the GPU's rendering throughput and memory bandwidth are insufficient for 4K gaming. This is a GPU that excels at 1080p, is competent at 1440p, but struggles at 4K.