Roblox

The Intel Core Ultra 7 155H paired with the NVIDIA GeForce RTX 4090 Mobile delivers an exceptional Roblox experience, ranking in the top quartile of all tested combinations. The data shows this combo scales from a blistering 505 FPS at 1080p Low to a still-smooth 124 FPS at 4K Ultra, indicating that the dominant constraint shifts from the GPU at lower resolutions to the CPU at higher settings. This analysis breaks down the measured performance, contextualizes the hardware's capabilities, and provides clear guidance on optimal settings.

FAQ

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

A: The highest average frame rate is 505 FPS, achieved at 1920x1080 resolution with Low settings.

Q: How does the CPU's multi-threaded performance compare to its closest rivals?

A: The Intel Core Ultra 7 155H has an average benchmark score of 32697, placing it virtually tied with the Intel Core i5-14600T (score 32707, delta 0%) and the AMD Ryzen AI 7 PRO 360 (score 32662, delta 0.1%). It trails the AMD Ryzen 7 PRO 6850H by a negligible 0.4%.

Q: What is the GPU's closest competitor based on average benchmark scores?

A: The NVIDIA GeForce RTX 4090 Mobile (avg score 43667) is closely matched with the NVIDIA RTX A6000, which scores 44075, a 0.9% difference. It is also 0.8% faster than the NVIDIA Quadro M6000 (score 43301).

Q: Does the RTX 4090 Mobile have a large memory pool for this game?

A: Yes, the GPU is equipped with 16 GB of GDDR6 memory on a 256-bit bus, providing a bandwidth of 576.0 GB/s. This is ample for Roblox's demands.

Q: At which resolution and settings does the combo achieve its lowest average FPS?

A: The lowest average FPS recorded is 124, which occurs at 3840x2160 (4K) resolution with Ultra settings.

Q: What is the combo's rank among all tested configurations for this game?

A: This combination ranks 828th out of 3711 tested combos, placing it in the top 22% of all systems tested for Roblox.

GPU Role

The NVIDIA GeForce RTX 4090 Mobile is the undisputed performance leader in this pairing, and its specifications explain why it dominates Roblox. The GPU features a massive 16 GB of GDDR6 memory, a 256-bit memory bus, and 576.0 GB/s of bandwidth, ensuring that texture streaming and asset loading are never bottlenecks. Its Ada Lovelace architecture, built on a 5 nm process, contains 9728 shading units, 304 TMUs, and 112 ROPs, allowing it to process massive amounts of pixel data.

Clock speeds are also critical to its performance. The GPU operates at a base clock of 1335 MHz and boosts up to 1695 MHz, which drives its impressive pixel rate of 189.8 GPixel/s and texture rate of 515.3 GTexel/s. This raw throughput translates directly to the high frame rates observed in the measured data. For instance, the move from 1080p to 4K represents a 4x increase in pixel count, yet the GPU still produces 191 FPS at 4K Low settings, showcasing its immense fill rate capabilities.

The GPU’s 32.98 TFLOPS of FP32 compute power is another indicator of its headroom. In Roblox, which is not a graphically demanding title by modern standards, this level of compute is overkill, allowing the GPU to maintain high frame rates even when not fully utilized. The data supports this: at 1080p Low, the average FPS of 505 suggests the CPU is the limiting factor, as the GPU is capable of far more. However, at 4K Ultra, the average FPS drops to 124, suggesting the GPU is finally being pushed closer to its limits, though it still delivers a playable experience.

Resolution Scaling

The frame rate scaling from 1080p to 4K provides clear insight into system bottlenecks. At Low settings, the average FPS drops from 505 at 1920x1080 to 337 at 2560x1440 and finally to 191 at 3840x2160. This represents a 62% reduction from 1080p to 4K, which is a smaller percentage drop than the 4x increase in pixel count would suggest. This indicates that at lower settings, the system is heavily CPU-bound, as the CPU cannot feed frames fast enough to keep the GPU fully occupied.

Conversely, at Ultra settings, the pattern is different. The FPS drops from 330 at 1080p to 220 at 1440p and 124 at 4K. This is a 62% drop from 1080p to 4K as well, but the absolute numbers are lower, suggesting a more balanced load. The fact that the 4K Ultra score (124 FPS) is still above 60 FPS indicates that even at the highest visual fidelity, the combo has significant headroom.

The data shows that the limiting component shifts with resolution. At 1080p, the CPU (Intel Core Ultra 7 155H) is the primary constraint, as evidenced by the high FPS across all settings. At 4K, the GPU (RTX 4090 Mobile) becomes more of a factor, but its 16 GB of VRAM and high bandwidth ensure it never becomes a hard bottleneck. The scaling is not linear, and the performance gap between Low and Ultra settings narrows as resolution increases, from a 175 FPS difference at 1080p to a 67 FPS difference at 4K, further confirming the CPU's role as the initial limiter.

Measured FPS Breakdown

The measured data provides a comprehensive look at performance across three resolutions and four settings presets.

1920x1080:

• Low: 505 FPS average. This is the peak performance for the combo, indicating a pure CPU-bound scenario.
• Medium: 460 FPS average, with a minimum of 391 FPS and a maximum of 529 FPS. The tight range suggests consistent frame pacing.
• High: 407 FPS average. A clear step down from Medium, but still extraordinarily high.
• Ultra: 330 FPS average. The most demanding 1080p preset, yet it still delivers well over 300 FPS.

2560x1440:

• Low: 337 FPS average. A significant drop from 1080p, showing the GPU is beginning to take on more work.
• Medium: 307 FPS average, with a minimum of 261 FPS and a maximum of 353 FPS. The minimum here is still above the refresh rate of most high-end monitors.
• High: 271 FPS average. Performance remains exceptionally high, suitable for 144Hz or 240Hz displays.
• Ultra: 220 FPS average. Drops below the 240 FPS mark but remains well above 144 FPS.

3840x2160 (4K):

• Low: 191 FPS average. A very strong result for 4K, proving the GPU's capability.
• Medium: 174 FPS average, with a minimum of 148 FPS and a maximum of 200 FPS. The minimum is still comfortably above 144 FPS.
• High: 153 FPS average. A playable and smooth experience at 4K.
• Ultra: 124 FPS average. The lowest recorded score, but it still exceeds the 60 FPS threshold for a good experience.

The data shows a consistent trend: the gap between Low and Ultra settings is roughly 175 FPS at 1080p, 117 FPS at 1440p, and 67 FPS at 4K. This diminishing gap underscores the CPU's dominance at lower resolutions, where it limits the frame rate regardless of GPU load.

How This Combo Ranks

This specific configuration of the Intel Core Ultra 7 155H and NVIDIA GeForce RTX 4090 Mobile ranks 828th out of 3711 tested combos for Roblox. This places it in the top 22.3% of all systems, a strong result but not the absolute top tier. The ranking is likely held back by the CPU, which, while capable, is not the fastest mobile processor available.

The CPU's average benchmark score of 32697 places it in the 83rd percentile of all CPUs, with rivals like the Intel Core i5-14600T (score 32707) and AMD Ryzen AI 7 PRO 360 (score 32662) essentially matching its performance. This means the CPU is a solid mid-to-high-end part, but it does not have the raw multi-threaded power of more expensive desktop or HX-series mobile chips.

The GPU, however, is a different story. The RTX 4090 Mobile sits in the 84th percentile of all GPUs, with an average score of 43667. Its nearest rivals, such as the NVIDIA RTX A6000 (score 44075) and the NVIDIA Quadro M6000 (score 43301), are within a 1% margin. This indicates that the GPU is a top-tier part that can handle virtually any gaming workload.

The combination of a mid-high CPU with a top-tier GPU means the system is well-balanced for Roblox, but the CPU prevents it from reaching the very top of the rankings. The 828th rank out of 3711 combos is respectable, but it suggests that systems with faster CPUs (e.g., Intel Core i9 or AMD Ryzen 9) paired with similar GPUs would achieve higher frame rates, especially at 1080p.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend on the user's display refresh rate and resolution preference.

For 1080p displays (1920x1080): The data shows that even at Ultra settings, the combo delivers 330 FPS. This is sufficient for any 240Hz or 360Hz monitor. However, if the user prioritizes maximum frame rate, Low settings yield 505 FPS. A balanced recommendation is High settings, which provides 407 FPS and a better visual experience without sacrificing competitive frame rates. The CPU is the bottleneck here, so the GPU can handle any settings without issue.

For 1440p displays (2560x1440): The Ultra preset delivers 220 FPS, which is ideal for 240Hz monitors. If the display is 144Hz, the High preset at 271 FPS provides a massive margin of safety and better visuals than Medium. The Medium preset (307 FPS) is also a viable option, but the extra visual fidelity of High is worth the minor FPS reduction. The data shows no risk of dropping below 144 FPS with any preset at this resolution.

For 4K displays (3840x2160): The High preset at 153 FPS is the sweet spot, offering a perfect balance for 144Hz displays. The Ultra preset at 124 FPS is still excellent and suitable for 120Hz displays. The Medium preset (174 FPS) offers the highest frame rate above 144 FPS, but High provides a significant visual upgrade. Given that the minimum FPS for High is not recorded, the Medium preset (min 148 FPS) offers the safest bet for maintaining high refresh rates.

General Recommendation: For the best overall experience, the High preset is the most balanced choice across all resolutions. It never dips below 153 FPS at 4K and reaches 407 FPS at 1080p, ensuring smooth gameplay on any modern display. The Ultra preset is only recommended for users who prioritize visual fidelity over raw frame rate, as it still maintains 124 FPS at 4K. The Low preset is unnecessary for this hardware, as the GPU has ample headroom to run higher settings without compromising performance.