Roblox

Roblox is a notoriously CPU-sensitive sandbox title, and the combination of the Intel Core Ultra 5 125H with the NVIDIA GeForce RTX 4080 produces a fascinating dataset. The measured frames per second reveal a system where the processor is the primary arbiter of performance, with the graphics card often operating well below its potential. The data indicates that this pairing yields extremely high frame rates across all tested resolutions, yet the scaling patterns expose a clear bottleneck that shifts depending on the workload. This analysis walks through the measured FPS data, the CPU and GPU roles, and how this specific combo ranks against other tested configurations in the database.

Resolution Scaling

The FPS drop from 1080p to 4K is the first indicator of where the system's limits lie. At 1920x1080 with Low settings, the combo produces an average of 461 FPS. Moving to 2560x1440 at Low settings, the average drops to 308 FPS, a reduction of roughly 33%. At 3840x2160 with Low settings, the average falls further to 174 FPS, which is a 62% drop from the 1080p result. This steep decline as resolution increases is the classic signature of a GPU-bound scenario at higher pixel counts, but the absolute FPS numbers are so high that the GPU is never truly strained.

The pattern becomes more telling when examining the High settings preset. From 371 FPS at 1080p, the average drops to 248 FPS at 1440p (a 33% reduction) and then to 140 FPS at 4K (a 62% reduction from 1080p). This consistent scaling percentage across Low and High settings suggests that the game's rendering pipeline is scaling predictably with pixel count, but the absolute values hint that the CPU is still setting the ceiling. At 4K Ultra, the average FPS falls to 114, which is the lowest measured result in the entire dataset. The gap between 4K Low (174 FPS) and 4K Ultra (114 FPS) is a 34% performance penalty, indicating that the Ultra preset introduces significant additional shading and effects work that the RTX 4080 can handle, but not without cost.

The most revealing data point is the 1080p Low result of 461 FPS. This figure approaches the practical limit of many display refresh rates and suggests that the CPU is nearing its maximum throughput for this game's single-threaded physics and scripting tasks. When the resolution drops to 1080p, the GPU has less pixel work to do, yet the FPS does not scale linearly with the reduced pixel count compared to 1440p. The 1440p Low result of 308 FPS versus the 1080p Low result of 461 FPS shows a 49% increase in FPS for a 44% reduction in pixels. This near-linear scaling indicates the RTX 4080 is still capable of doing more work, and the limiting factor at 1080p is the CPU's ability to feed the render thread with draw calls and game state updates.

CPU Role

The Intel Core Ultra 5 125H is a 14-core, 18-thread mobile processor based on the Meteor Lake architecture, built on a 7 nm process. It has a base clock of 3.60 GHz and a boost clock of 4.50 GHz. The CPU's benchmark data shows a Cinebench R23 multi-core score of 12804.5 and a single-core score of 1647.5. In the Passmark suite, it achieves a multi-thread score of 21100 and a single-thread score of 3399. These figures place the CPU at the 79th percentile against all tested CPUs, with an average benchmark score of 27507. Its nearest rivals include the AMD Ryzen 7 5800 (deltaPct of -0.1%) and the Intel Core i5-12600K (deltaPct of -0.3%), indicating that the 125H sits in a competitive performance tier for mobile silicon.

In Roblox, the CPU's role is dominant. The measured FPS at 1080p Low (461 FPS) versus 1080p Ultra (301 FPS) shows a 35% reduction in performance from the most CPU-light preset to the most demanding graphics preset. This indicates that while the GPU is doing more work at Ultra, the CPU is still the primary constraint. The game's engine relies heavily on single-threaded performance for its main game loop, physics simulation, and user-generated content logic. The Core Ultra 5 125H's boost clock of 4.50 GHz is adequate for this task, but the 18-thread configuration is largely underutilized, as Roblox typically does not scale well across many cores.

The L3 cache of 18 MB (shared) is another factor. The data shows that the CPU's Passmark random string sorting score is 27435, which is a memory-heavy workload. A larger cache helps with the random access patterns common in sandbox games with many objects. However, the 2 MB L2 cache per core and 112 KB L1 per core are modest. The benchmark results indicate that the CPU is a solid performer for its mobile class, but it is not a desktop-class chip. The deltaPct values versus its rivals are all within 0.5%, meaning that swapping this CPU for a Ryzen 7 5800 or i5-12600K would yield nearly identical Roblox performance, assuming the same GPU and memory configuration.

How This Combo Ranks

The combination of the Intel Core Ultra 5 125H and the NVIDIA GeForce RTX 4080 holds a combo rank of 1223 out of 3711 tested combos in the database for Roblox. This places it firmly in the top third of all configurations tested. The rank is a composite score that likely weighs the average FPS across all tested settings and resolutions. Given the high FPS numbers, the rank is respectable but not top-tier, which is expected for a mobile CPU paired with a desktop-class GPU.

The ranking makes sense when considering the CPU's performance ceiling. While the RTX 4080 is an extremely powerful GPU (ranking at the 86th percentile against all GPUs), the 125H CPU is a mid-range mobile part. The combo rank of 1223 suggests that there are many configurations with faster desktop CPUs that achieve higher FPS in Roblox, despite having slower GPUs. This is because Roblox is CPU-bound at high frame rates. The data shows that the combo's 1080p Low result of 461 FPS is excellent, but a combo with a higher single-thread CPU performance could push that number higher.

The percentileVsAllCpus score of 79 for the CPU and 86 for the GPU indicates that the GPU is relatively stronger than the CPU in their respective pools. This asymmetry is the defining characteristic of this combo. The measured FPS data confirms this: the GPU is rarely the limiting factor, and the CPU's single-thread performance dictates the top-end frame rates. The combo rank of 1223 out of 3711 (about 33rd percentile) is a direct consequence of this imbalance.

Measured FPS Breakdown

The dataset provides exact average FPS values for 12 different configurations (3 resolutions × 4 settings presets). At 1920x1080, the results are as follows: Low settings produce 461 FPS, Medium settings produce 420 FPS (with a min of 357 and max of 483), High settings produce 371 FPS, and Ultra settings produce 301 FPS. The spread from Low to Ultra is 160 FPS, which is a 35% performance penalty for enabling the highest graphics preset. The Medium preset's min FPS of 357 is notably high, indicating good frame pacing.

At 2560x1440, the results scale down predictably. Low settings produce 308 FPS, Medium settings produce 280 FPS (with a min of 238 and max of 322), High settings produce 248 FPS, and Ultra settings produce 201 FPS. The spread from Low to Ultra is 107 FPS, which is a 35% penalty, mirroring the 1080p scaling. The Medium preset at 1440p has a min FPS of 238, which is still above the refresh rate of most 1440p monitors (typically 144Hz or 165Hz).

At 3840x2160, the results show the GPU beginning to feel the load. Low settings produce 174 FPS, Medium settings produce 158 FPS (with a min of 135 and max of 182), High settings produce 140 FPS, and Ultra settings produce 114 FPS. The spread from Low to Ultra is 60 FPS, which is a 34% penalty. The Medium preset's min FPS of 135 is interesting because it suggests that even at 4K, the CPU is still preventing the GPU from fully stretching its legs. The RTX 4080 is capable of much higher frame rates in less CPU-intensive games, but Roblox's engine limits it here.

The data reveals a consistent pattern: each step up in settings from Low to Ultra costs roughly 35% of the average FPS, regardless of resolution. This suggests that the graphics presets in Roblox scale the GPU workload proportionally, while the CPU workload remains relatively constant. The absolute FPS numbers are all playable, even at 4K Ultra with 114 FPS, but the min FPS values (where available) indicate that the Medium preset offers the most stable experience across all resolutions.

GPU Role

The NVIDIA GeForce RTX 4080 is a high-end desktop GPU based on the Ada Lovelace architecture, built on a 5 nm process at TSMC. It has 16 GB of GDDR6X memory on a 256-bit bus, providing a memory bandwidth of 716.8 GB/s. The GPU has 9728 shading units, 304 TMUs, and 112 ROPs, with a base clock of 2205 MHz and a boost clock of 2505 MHz. Its FP32 performance is rated at 48.74 TFLOPS. The GPU's benchmark scores include a Passmark G3D score of 34457 and a Geekbench Vulkan score of 263779. It ranks at the 86th percentile against all GPUs, with an average benchmark score of 54247. Its nearest rival is the RTX 4080 SUPER (deltaPct of 0.1%), indicating that the two cards are nearly identical in raw compute performance.

In this Roblox dataset, the GPU's role is secondary. The 16 GB of VRAM is more than sufficient for Roblox, which is not a VRAM-heavy title. The 716.8 GB/s bandwidth and 48.74 TFLOPS of compute are far beyond what Roblox requires for its stylized graphics. The measured FPS data shows that the GPU is not the bottleneck at 1080p or 1440p, as the FPS scales with resolution in a linear fashion. However, at 4K Ultra, the GPU is beginning to be taxed, as evidenced by the 114 FPS average. This is still a high frame rate, but it is the lowest in the dataset.

The GPU's memory clock of 1400 MHz (22.4 Gbps effective) and its triple-slot cooler are irrelevant to the game's performance. The data suggests that the RTX 4080 is overkill for Roblox at 1080p and 1440p, where the CPU is the limiting factor. The GPU's percentile rank of 86 is higher than the CPU's rank of 79, which reinforces the notion that this combo is unbalanced for this specific game. A less powerful GPU would likely produce nearly identical FPS numbers at 1080p, as the CPU would still be the constraint.

FAQ

Q: What is the highest average FPS recorded for this combo in Roblox?

A: The highest average FPS recorded is 461 FPS at 1920x1080 resolution with Low settings.

Q: How much performance is lost when moving from 1080p to 4K on Ultra settings?

A: At Ultra settings, the average FPS drops from 301 at 1080p to 114 at 4K, representing a 62% reduction in performance.

Q: Is the RTX 4080 the bottleneck for this combo in Roblox?

A: No, the data suggests the CPU is the primary bottleneck. At 1080p Low, the FPS is 461, which is extremely high, and the scaling from 1440p to 1080p (308 to 461 FPS) indicates the GPU has headroom left.

Q: What is the combo's rank among all tested configurations in Roblox?

A: The combo ranks 1223rd out of 3711 tested combos, placing it in the top third of all configurations.

Q: Which settings preset offers the most stable frame pacing at 1440p?

A: The Medium preset at 2560x1440 shows an average FPS of 280 with a min FPS of 238 and a max FPS of 322, indicating a stable experience.

Q: How does the CPU compare to its nearest rivals in benchmark scores?

A: The Intel Core Ultra 5 125H has an average benchmark score of 27507, which is 0.1% lower than the AMD Ryzen 7 5800 and 0.3% lower than the Intel Core i5-12600K.

Settings Recommendations

Based on the measured FPS data, the optimal settings preset depends on the target resolution and refresh rate. For 1920x1080, the Ultra preset delivers an average of 301 FPS, which is well above any consumer display's refresh rate. The High preset at 371 FPS and Medium at 420 FPS offer even higher headroom, but the visual difference between High and Ultra may be noticeable. For 1080p, the High preset (371 FPS) is the best balance, as it provides a substantial visual upgrade over Low (461 FPS) while still maintaining a massive frame rate cushion.

At 2560x1440, the Ultra preset averages 201 FPS, which is still above the 144Hz refresh rate of most high-refresh monitors. The Medium preset (280 FPS) offers the best frame pacing with a min FPS of 238, making it the most stable choice for competitive play. For 1440p users with a 240Hz monitor, the Low preset (308 FPS) is the only way to fully utilize the display's potential, but the Medium preset's min FPS of 238 is still above the 240Hz threshold in most scenes.

At 3840x2160, the situation changes. The Ultra preset averages 114 FPS, which is playable but not ideal for high-refresh 4K displays (typically 120Hz or 144Hz). The High preset (140 FPS) is the best recommendation for 4K, as it stays above 120 FPS on average. The Medium preset (158 FPS) provides an even larger safety margin, with a min FPS of 135 that ensures it never drops below the 120Hz threshold. The Low preset (174 FPS) is unnecessary, as the visual sacrifices are significant for only a marginal FPS gain over Medium. The data shows that Medium at 4K is the sweet spot, offering a min FPS of 135 and an average of 158, making it the most consistent experience for 4K gaming on this combo.