Roblox

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

The measured frame rates across resolutions reveal a clear pattern of GPU-bound scaling behavior. At 1080p High settings, the Intel Arc B370 paired with the Core Ultra 7 270K Plus delivers 124 FPS. Moving to 1440p High drops that to 83 FPS, a reduction of 41 FPS or roughly 33%. At 4K High, the average falls to 47 FPS, which is 77 FPS below the 1080p result — a 62% performance loss from the starting point. This steep decline as pixel count increases is the classic signature of a GPU-limited scenario, where the rendering hardware cannot keep pace with the growing number of pixels being pushed.

The scaling pattern holds across all four settings presets. For Low settings, the progression is 154 FPS at 1080p, 103 FPS at 1440p, and 58 FPS at 4K. Medium settings show 140 FPS at 1080p, 94 FPS at 1440p, and 53 FPS at 4K. Ultra settings produce 101 FPS at 1080p, 67 FPS at 1440p, and 38 FPS at 4K. In every case, the step from 1440p to 4K removes more than 40% of the frame rate, while the step from 1080p to 1440p removes between 27% and 34%. The consistent, steep drop at every resolution transition indicates that the integrated graphics solution is the primary bottleneck, not the CPU.

The CPU side of this combination is extraordinarily powerful for this workload. The Core Ultra 7 270K Plus has 24 cores and 24 threads with a boost clock of 5.50 GHz. Its Cinebench R23 multi-core score of 44253 places it in the 96th percentile of all CPUs tested. A processor of this caliber is far beyond what Roblox requires, which is a sandbox game that tends to be modest in its CPU demands. The data supports this interpretation: if the CPU were the limiting factor, we would expect frame rates to remain relatively flat across resolutions, since the CPU workload does not change much with pixel count. Instead, the frame rates decline sharply at higher resolutions, confirming that the GPU is the constraining component.

The Arc B370's specifications reinforce this finding. It is an integrated graphics processor (IGP) with a 25 W TDP, 1280 shading units, and a boost clock of 2400 MHz. Its 3DMark Steel Nomad DX12 score of 1184 places it in the 5th percentile of all GPUs, indicating extremely limited graphics performance relative to the broader market. The 4K results — 47 FPS on High, 53 FPS on Medium, 58 FPS on Low — are all below the 60 FPS threshold that most users consider smooth, which is consistent with a GPU that ranks in the bottom 5% of all tested graphics solutions.

FAQ

Q: What is the highest average frame rate this combination achieves in Roblox?

A: The highest measured average is 154 FPS, achieved at 1920x1080 resolution with Low settings. The same resolution at Medium settings delivers 140 FPS, while High settings produce 124 FPS and Ultra settings yield 101 FPS.

Q: How does the GPU's benchmark score compare to its nearest rivals?

A: The Intel Arc B370 scores 1184 in 3DMark Steel Nomad DX12. The nearest rival is the ATI Mobility Radeon HD 5570 with a score of 1186, a delta of -0.2%. The ATI Radeon HD 5770 scores 1190 (delta -0.5%), the AMD Radeon HD 7650M scores 1192 (delta -0.7%), and the AMD FirePro M2000 scores 1168 (delta 1.4%). All of these are within a 1.4% margin, indicating near-identical performance levels.

Q: What is the frame rate difference between Low and Ultra settings at 1080p?

A: At 1920x1080, Low settings average 154 FPS while Ultra settings average 101 FPS. The difference is 53 FPS, meaning Ultra delivers approximately 34% lower frame rates than Low at this resolution.

Q: Is the CPU a limiting factor in this game?

A: The data suggests the CPU is not the bottleneck. The Core Ultra 7 270K Plus ranks in the 96th percentile of all CPUs with a multi-core score of 44253 in Cinebench R23. The frame rate scaling across resolutions — dropping from 124 FPS at 1080p High to 47 FPS at 4K High — indicates GPU limitation rather than CPU limitation, as CPU workload would not scale as dramatically with pixel count.

Q: What is the lowest average frame rate recorded in this benchmark set?

A: The lowest average is 38 FPS, measured at 3840x2160 resolution with Ultra settings. The next lowest is 47 FPS at 4K High settings, then 53 FPS at 4K Medium, and 58 FPS at 4K Low.

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

A: This combination ranks 2774 out of 3010 tested combos in Roblox, placing it in the bottom 8% of all tested combinations for this game.

GPU Role

The Intel Arc B370 is an integrated graphics processor built on the Xe3-LPG architecture, fabricated on a 3 nm process by Intel. Its specifications place it firmly in the entry-level segment: 1280 shading units, 40 texture mapping units, 20 raster operation units, and 10 ray tracing cores. The clock speeds are modest, with a base of 300 MHz and a boost of 2400 MHz. The memory subsystem is entirely system-shared, with no dedicated VRAM — the memory size, type, and bus width are all listed as "System Shared," and bandwidth is "System Dependent."

These specifications translate into a 3DMark Steel Nomad DX12 score of 1184, which places the GPU in the 5th percentile of all GPUs tested. The nearest rivals in the benchmark database are the ATI Mobility Radeon HD 5570 (1186, delta -0.2%), ATI Radeon HD 5770 (1190, delta -0.5%), AMD Radeon HD 7650M (1192, delta -0.7%), and AMD FirePro M2000 (1168, delta 1.4%). The Arc B370 is essentially at parity with these older discrete cards, which highlights its limited capacity for modern gaming workloads.

In Roblox specifically, the GPU's limitations manifest clearly in the frame rate data. At 4K Ultra, the combination produces only 38 FPS, which is below playable thresholds for most users. Even at 1080p, the highest settings only achieve 101 FPS, and dropping to Low settings raises this to 154 FPS. The GPU's pixel rate of 48.00 GPixel/s and texture rate of 96.00 GTexel/s are the theoretical limits that constrain these results. The FP32 throughput of 6.144 TFLOPS is the raw compute capacity that Roblox's rendering pipeline can draw upon, and the data shows it is insufficient for high-resolution, high-settings play.

The boost clock of 2400 MHz is the same regardless of resolution, meaning the GPU is running at its maximum capability across all tests. The fact that frame rates drop so consistently with resolution increases confirms that the GPU is working at full capacity and still cannot maintain high frame rates at 4K. The system-shared memory architecture means the GPU competes with the CPU for memory bandwidth, which is rated at 115.2 GB/s for the CPU's dual-channel DDR5 configuration. This shared arrangement can further limit performance, as the graphics workload and the CPU workload draw from the same memory pool.

Measured FPS Breakdown

At 1920x1080 resolution, the measured frame rates show a clear progression across settings. Low settings produce the highest average at 154 FPS. Medium settings yield 140 FPS, with a minimum of 119 FPS and a maximum of 161 FPS. High settings deliver 124 FPS. Ultra settings produce the lowest result at 101 FPS. The spread from Low to Ultra is 53 FPS, which means Ultra delivers roughly two-thirds of the frame rate of Low.

Moving to 2560x1440, the overall performance drops substantially. Low settings average 103 FPS, a 51 FPS reduction from 1080p Low. Medium settings produce 94 FPS, with a minimum of 80 FPS and a maximum of 108 FPS. High settings deliver 83 FPS. Ultra settings yield 67 FPS. The gap between Low and Ultra narrows to 36 FPS at this resolution, indicating that the GPU is becoming more of a constraint at higher pixel counts.

At 3840x2160, the performance drops further across the board. Low settings average 58 FPS, which is 45 FPS below the 1080p Low result. Medium settings produce 53 FPS, with a minimum of 45 FPS and a maximum of 61 FPS. High settings deliver 47 FPS. Ultra settings yield 38 FPS. The Low-to-Ultra spread is now 20 FPS, the smallest of any resolution, confirming that the GPU is saturated and settings adjustments have diminishing returns at 4K.

The Medium settings rows provide the only min/max data in the entire measured set. At 1080p Medium, the range is 119 to 161 FPS, a spread of 42 FPS. At 1440p Medium, the range is 80 to 108 FPS, a spread of 28 FPS. At 4K Medium, the range is 45 to 61 FPS, a spread of 16 FPS. The narrowing range with increasing resolution further indicates GPU saturation — at 4K, the GPU is consistently near its limit, leaving less room for frame time variation.

Settings Recommendations

The measured data provides clear guidance on the optimal settings for this combination. At 1080p, High settings at 124 FPS offer a solid balance between visual quality and smoothness. The step from High to Ultra costs 23 FPS (from 124 to 101), which is an 18% reduction for what is typically a modest visual improvement in Roblox. Medium settings at 140 FPS provide a 16 FPS advantage over High, but the visual quality reduction may not be worth that gain for most users. Low settings at 154 FPS are only 30 FPS higher than High, and the visual compromise is substantial.

At 1440p, the situation changes. High settings deliver 83 FPS, which is still smooth for most gameplay. Ultra settings drop to 67 FPS, which is playable but noticeably less fluid. Medium settings at 94 FPS offer a good middle ground, and Low at 103 FPS provides the best frame rates at this resolution. The data suggests that at 1440p, Medium or High settings offer the best experience, as they maintain frame rates above 80 FPS while preserving reasonable visual quality.

At 4K, none of the settings achieve 60 FPS. Low settings produce 58 FPS, which is just below the 60 FPS threshold. Medium produces 53 FPS, High produces 47 FPS, and Ultra produces 38 FPS. For 4K play, Low settings are the only option that approaches smooth gameplay, and even then, the average falls short of 60 FPS. Users who prioritize frame rate over resolution should consider 1440p or 1080p instead.

The overall recommendation based on the measured rows is to use High settings at 1080p (124 FPS) or Medium settings at 1440p (94 FPS). Both options maintain frame rates well above 60 FPS while providing better visual quality than Low. At 4K, Low settings at 58 FPS are the only viable choice, and users should be prepared for occasional dips below 60 FPS given that the Medium settings at 4K show a minimum of 45 FPS.

CPU Role

The Intel Core Ultra 7 270K Plus is a desktop processor from the Core Ultra Series 2, built on the Arrow Lake Refresh architecture using a 3 nm process from TSMC. It features 24 cores and 24 threads, with a base clock of 3.70 GHz and a boost clock of 5.50 GHz. The cache hierarchy includes 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3 cache. The processor supports dual-channel DDR5 memory with a bandwidth of 115.2 GB/s and includes integrated Arc Xe-LPG Graphics with 64 execution units.

The CPU's benchmark results are outstanding. In Cinebench R23, it scores 44253 in multi-core and 2439 in single-core. The Passmark multi-thread score is 68574, with a single-thread score of 5068. The average benchmark score across all tests is 93785, placing the CPU in the 96th percentile of all CPUs tested. Its nearest rivals are the Intel Xeon 6520P (93786, delta 0%), AMD EPYC 4564P (95183, delta -1.5%), AMD EPYC 9175F (95615, delta -1.9%), and AMD EPYC 4565P (95764, delta -2.1%). The CPU is essentially at parity with the Xeon 6520P and within 2% of the EPYC processors.

In the context of Roblox, the CPU's role is largely background support. The game is not known for heavy CPU demands, and the measured frame rates across resolutions show that the GPU is the limiting factor. The 24-core configuration and 5.50 GHz boost clock provide far more compute capacity than Roblox requires. Even at 1080p Low, where the CPU would have the most headroom relative to the GPU, the frame rate is 154 FPS — a strong result, but one that is still constrained by the GPU rather than the CPU.

The CPU's integrated graphics, Arc Xe-LPG Graphics with 64 EU, is a separate component from the discrete Arc B370 GPU that is the subject of this analysis. However, both are Intel graphics solutions, and the CPU's memory controller and cache architecture can influence GPU performance through the shared memory subsystem. The dual-channel DDR5 configuration with 115.2 GB/s bandwidth is the conduit through which the system-shared GPU memory operates, so the CPU's memory support indirectly affects the GPU's access to data.

How This Combo Ranks

This combination of Intel Core Ultra 7 270K Plus and Intel Arc B370 ranks 2774 out of 3010 tested combos in Roblox. This places it in the bottom 8% of all tested combinations, which is consistent with the GPU's 5th percentile ranking among all GPUs. The CPU's 96th percentile ranking does not compensate for the GPU's limitations in this game, as the frame rate data clearly shows the GPU is the bottleneck.

The ranking reflects the overall gaming capability of this combination. While the CPU is among the top 4% of all processors, the GPU is among the bottom 5% of all graphics solutions. In Roblox, where the GPU determines frame rates across all resolutions and settings, the combination's overall ranking is dragged down by the GPU's performance. The measured frame rates — even at 1080p Low, the best-case scenario — place this combination below what most other tested combos achieve.

The gap between the CPU's and GPU's performance levels is substantial. The CPU's average benchmark score of 93785 is 96th percentile, while the GPU's average score of 1184 is 5th percentile. This asymmetry means the combination is imbalanced for gaming, with the CPU capable of far more than the GPU can deliver. In a game like Roblox, which is not CPU-intensive, this imbalance results in a combination that ranks poorly relative to other tested configurations.