Roblox

Roblox is not a typical GPU stress test, but the data for this specific combination reveals a system that is massively overqualified for the title, yet still exhibits clear performance scaling tied to both resolution and the CPU's capabilities. The pairing of a mobile Intel Core Ultra 5 125H with a desktop-class NVIDIA GeForce RTX 4090 creates a bottleneck dynamic where the GPU is rarely the limiting factor, even at 4K. This analysis breaks down the measured FPS, settings behavior, and component roles based strictly on the provided benchmark data.

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

The NVIDIA GeForce RTX 4090 in this system is a data center of graphics processing power attached to a game that can run on an integrated GPU. With 24 GB of GDDR6X memory on a 384-bit bus delivering 1.01 TB/s of bandwidth, the memory subsystem is effectively idle in Roblox. The game's assets, even at Ultra settings, do not approach the memory capacity or bandwidth limits of this card. The measured FPS figures confirm this: at 1080p Ultra, the card produces 330 FPS, but at 1080p Low, it jumps to 505 FPS. This 175 FPS gap between settings is not caused by VRAM capacity or memory speed; it is a function of the shading workload and the CPU's ability to feed the GPU.

The GPU's architectural specs—16,384 shading units, 512 TMUs, and 176 ROPs—are the primary drivers of raw rasterization performance. The boost clock of 2520 MHz and base clock of 2235 MHz are high, but in a game like Roblox, the GPU is often waiting on the CPU to submit draw calls. The benchmark results show that the RTX 4090's average benchmark score of 60347 places it at the 88th percentile of all GPUs, with its nearest rival, the Intel Arc Pro A60, matching it at a 0% delta. This indicates that in synthetic workloads, the card is performing exactly as expected. However, in Roblox, the frame pacing is more dependent on the CPU's single-thread performance.

Examining the resolution scaling, the GPU's role becomes clearer. At 4K High, the average FPS is 153, which is still exceptionally high. Dropping to 4K Low increases the average to 191 FPS. This shows that even at 4K, the GPU is not saturated; the 38 FPS difference between Low and High at 4K is relatively small compared to the 175 FPS difference at 1080p. This suggests that at lower resolutions, the CPU bottleneck is more pronounced, and the GPU's raw power cannot be fully utilized. The card's 82.58 TFLOPS of FP32 performance is more than capable of handling Roblox's simplistic shaders, but the game's engine and the CPU's physics calculations limit the frame rate ceiling.

The RTX 4090's production status is end-of-life, and its launch MSRP was 1,599 USD. The data shows that in this specific Roblox configuration, the GPU is never the primary limiter. The measured FPS at 4K Ultra (124 FPS) is still well above the refresh rate of most monitors, demonstrating that the GPU has ample headroom. The pixel rate of 443.5 GPixel/s and texture rate of 1,290.2 GTexel/s are theoretical maximums that Roblox will never reach. In practical terms, the GPU is a silent partner in this system, providing a massive performance buffer that ensures frame rates stay high regardless of the in-game chaos or player count.

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

Based on the measured data, the "High" preset offers the most balanced experience across all resolutions, but the "Ultra" preset is surprisingly viable given the GPU's headroom. At 1080p, the High preset delivers 407 FPS average, while Ultra drops to 330 FPS. The difference is 77 FPS, which is noticeable but not game-breaking. However, the data indicates that the CPU is the limiting factor at 1080p, as the gap between Low (505 FPS) and High (407 FPS) is 98 FPS, while the gap between High and Ultra is only 77 FPS. This suggests that the GPU can handle the increased visual fidelity of Ultra without a proportional penalty, but the CPU's single-thread performance caps the absolute frame rate.

At 1440p, the High preset yields 271 FPS, and Ultra yields 220 FPS. The 51 FPS drop is more pronounced than at 1080p, indicating that the GPU is starting to contribute more to the frame time. Medium settings at 1440p produce 307 FPS, which is only 36 FPS higher than High. For a smooth experience on a high-refresh-rate 1440p monitor, the High preset is recommended because it provides a significant visual upgrade over Medium with only a 36 FPS cost. The Ultra preset at 1440p (220 FPS) is still excellent, but the marginal visual gains over High are not worth the 51 FPS loss for competitive play.

At 4K, the High preset delivers 153 FPS, and Ultra drops to 124 FPS. This 29 FPS difference is the smallest relative drop across all resolutions, confirming that the GPU is becoming more relevant at 4K. The Medium preset at 4K yields 174 FPS, which is 21 FPS higher than High. Given that the RTX 4090 has 24 GB of VRAM, there is no memory pressure to worry about, so the High preset is the best choice for 4K gaming on this hardware. It provides a substantial visual quality increase over Medium with only a 21 FPS penalty, and it stays well above the 120 FPS threshold. The Low preset at 4K (191 FPS) is unnecessary; the visual degradation is severe, and the frame rate gain over High is only 38 FPS, which is not worth the loss in clarity.

The data supports a simple recommendation: use High settings for all resolutions. At 1080p, it provides 407 FPS; at 1440p, 271 FPS; and at 4K, 153 FPS. These are all high enough for any display, and the visual fidelity is superior to Medium or Low. The Ultra preset is only recommended if the user prioritizes maximum visual quality over frame rate headroom, as it still delivers 330 FPS at 1080p and 124 FPS at 4K, which are both playable.

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

The Intel Core Ultra 5 125H is a 14-core, 18-thread mobile processor based on the Meteor Lake architecture, with a base clock of 3.60 GHz and a boost clock of 4.50 GHz. In Roblox, the game's engine is heavily dependent on single-thread performance, and this CPU's boost clock is the critical factor. The benchmark data shows a single-core score of 1647.5 in Cinebench R23, which is adequate but not exceptional. The CPU's percentile vs all CPUs is 79, meaning it outperforms 79% of all processors in the database. Its nearest rival, the AMD Ryzen 7 5800, has an average score of 27535, which is 0.1% higher than this chip's 27507 average, indicating they are statistically tied.

The CPU's 18 threads are largely irrelevant in Roblox, which typically uses only a few cores. The measured FPS data supports this: at 1080p Low, the system produces 505 FPS, but this is likely the maximum the CPU can feed to the GPU. The fact that the FPS does not scale linearly with GPU power—the RTX 4090 is capable of much higher frame rates in other games—indicates a CPU bottleneck. The passmark single-thread score of 3399 and the passmark physics score of 1439 are more relevant to Roblox's gameplay than the multicore scores. The physics score, in particular, is a measure of the CPU's ability to handle game physics, which is a key component of Roblox's user-generated experiences.

The CPU's 18 MB of shared L3 cache and 2 MB of L2 cache per core are sufficient for Roblox's data footprint. The memory bandwidth of 89.6 GB/s is not a limiting factor, as the game's data sets are small. The CPU's architecture, Meteor Lake, is a hybrid design, but the game does not leverage the efficiency cores effectively. In practice, the boost clock of 4.50 GHz is what determines the frame rate ceiling in CPU-bound scenarios. The data shows that at 1080p, the FPS ranges from 330 FPS (Ultra) to 505 FPS (Low), and the CPU is the primary reason for this ceiling. If the CPU were faster, the FPS at 1080p Low could potentially be higher, but the current data shows a hard limit.

The CPU's average benchmark score of 27507 places it just below the Intel Core i5-12600K, which scores 27578 (0.3% higher). This is a desktop processor, so the mobile Ultra 5 125H is competitive with a desktop chip from a previous generation. However, in Roblox, the single-thread performance is what matters, and the 4.50 GHz boost clock is the key specification. The data indicates that the CPU is the bottleneck at 1080p and 1440p, while the GPU becomes more of a factor at 4K. The 14 cores and 18 threads are overkill for Roblox, but they do not hurt performance; they simply are not utilized.

FAQ — 4-6 Q&A pairs answerable from FACT PACK data

Q: What is the maximum average FPS achievable at 1080p with this hardware?

A: The highest average FPS recorded at 1920x1080 is 505 FPS, achieved with the Low settings preset. The Medium preset yields 460 FPS, High yields 407 FPS, and Ultra yields 330 FPS.

Q: Is the RTX 4090 the bottleneck in this system when playing Roblox?

A: The data suggests the CPU is the primary bottleneck at lower resolutions. At 1080p, the FPS drops from 505 (Low) to 330 (Ultra), but the GPU is capable of much higher frame rates. At 4K, the GPU becomes more relevant, with the FPS dropping from 191 (Low) to 124 (Ultra), indicating a more balanced load.

Q: How does the Intel Core Ultra 5 125H compare to its nearest rival in synthetic benchmarks?

A: The CPU has an average benchmark score of 27507, which is 0.1% lower than the AMD Ryzen 7 5800's score of 27535. It is also 0.3% lower than the Intel Core i5-12600K and AMD Ryzen 7 5700X, both of which score 27578.

Q: What is the frame time variance at 1440p Medium settings?

A: At 2560x1440 with Medium settings, the average FPS is 307, with a minimum of 261 FPS and a maximum of 353 FPS. This indicates a frame time variance of 92 FPS between the minimum and maximum.

Q: Does the RTX 4090's 24 GB of VRAM provide any advantage in Roblox?

A: The benchmark data does not show any VRAM-related limitations. Roblox does not appear to use a significant portion of the 24 GB GDDR6X memory, as the FPS scales consistently with settings changes without any signs of memory pressure at any resolution.

Q: What is the performance difference between Low and Ultra settings at 4K?

A: At 3840x2160, the Low preset averages 191 FPS, while the Ultra preset averages 124 FPS. This is a difference of 67 FPS, or approximately 35% lower performance on Ultra compared to Low.

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

The resolution scaling data reveals a classic CPU-GPU bottleneck shift. Moving from 1080p to 1440p and then to 4K, the average FPS decreases, but the rate of decrease is not uniform across settings. At Low settings, the FPS drops from 505 (1080p) to 337 (1440p) to 191 (4K). This is a 66.7% drop from 1080p to 1440p, and a 43.3% drop from 1440p to 4K. The large drop from 1080p to 1440p indicates that the CPU is still the bottleneck at 1440p, as the GPU should be able to handle the increased pixel count without a proportional FPS loss. The smaller drop from 1440p to 4K suggests the GPU is starting to become the limiting factor.

At High settings, the FPS drops from 407 (1080p) to 271 (1440p) to 153 (4K). The percentage drops are 33.4% and 43.5%, respectively. The drop from 1440p to 4K is larger than the drop from 1080p to 1440p, which is the opposite of the Low settings trend. This indicates that at higher settings, the GPU is more heavily utilized, and the resolution scaling is more typical of a GPU-bound scenario. The data shows that at 4K High, the system produces 153 FPS, which is still very high, but the scaling pattern suggests that the GPU is now the primary limiter.

At Ultra settings, the FPS drops from 330 (1080p) to 220 (1440p) to 124 (4K). The percentage drops are 33.3% and 43.6%, respectively. This is a consistent pattern with the High settings, confirming that the GPU is the bottleneck at higher resolutions and settings. The fact that the FPS at 4K Ultra (124) is less than half the FPS at 1080p Ultra (330) is a clear indication that the GPU's workload is scaling with resolution. The RTX 4090's 82.58 TFLOPS of FP32 performance is being taxed more at 4K, but it still manages to deliver playable frame rates.

The resolution scaling analysis indicates that at 1080p and 1440p, the CPU is the limiting component, as the FPS does not drop as much as expected when the resolution increases. However, at 4K, the GPU becomes the bottleneck, as the FPS drops more significantly. This is a classic sign of an imbalanced system, where a powerful GPU is paired with a mid-range mobile CPU. The data shows that the system is best suited for high-refresh-rate 1080p or 1440p gaming, where the CPU can keep up with the GPU's output. At 4K, the system is still capable, but the GPU is no longer being held back by the CPU.

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

1920x1080 (1080p):

The lowest settings preset, Low, produces the highest average FPS at 505. The Medium preset averages 460 FPS, with a minimum of 391 FPS and a maximum of 529 FPS. The High preset averages 407 FPS. The Ultra preset averages 330 FPS. This shows a clear scaling pattern where each step up in settings costs approximately 50-70 FPS at 1080p.

2560x1440 (1440p):

At this resolution, the Low preset averages 337 FPS. The Medium preset averages 307 FPS, with a minimum of 261 FPS and a maximum of 353 FPS. The High preset averages 271 FPS. The Ultra preset averages 220 FPS. The FPS drops from 1080p are significant, with the Low preset losing 168 FPS (33.3%) and the Ultra preset losing 110 FPS (33.3%).

3840x2160 (4K):

The Low preset at 4K averages 191 FPS. The Medium preset averages 174 FPS, with a minimum of 148 FPS and a maximum of 200 FPS. The High preset averages 153 FPS. The Ultra preset averages 124 FPS. The FPS drops from 1440p are also significant, with the Low preset losing 146 FPS (43.3%) and the Ultra preset losing 96 FPS (43.6%).

The data shows a consistent pattern: the Medium preset is the only one with recorded minimum and maximum FPS values, indicating that this setting was tested with a frame time capture. The minimum FPS at 4K Medium (148) is still above 144 FPS, which is the refresh rate of many high-end monitors. The maximum FPS at 1080p Medium (529) is the highest recorded value in the entire dataset. This suggests that the system is capable of very high frame rates, but the CPU limits the average FPS in most scenarios.

The overall combo rank in the game is 828 out of 3711 combos, placing this system in the top 22.3% of all tested configurations. This is a strong showing, but not the absolute top, which is likely reserved for systems with faster desktop CPUs. The data shows that the RTX 4090 is a dominant GPU, but its performance in Roblox is constrained by the Intel Core Ultra 5 125H, particularly at lower resolutions. For users with high-refresh-rate 1080p monitors, this system will deliver exceptional performance, but the CPU will prevent the GPU from reaching its full potential.