Roblox

The AMD Ryzen 9 8945HX paired with the NVIDIA GeForce RTX 4090 Mobile delivers measured frame rates in Roblox that are exceptionally high across every tested resolution and preset. This combination holds the 828th rank out of 3711 tested CPU‑GPU pairs in the game, and the data shows that even at 4K with Ultra settings the average FPS remains 124. The following sections dissect the measured FPS numbers, the hardware's role, and the practical implications for players.

Settings Recommendations

Roblox offers four graphics presets in the measured data: Low, Medium, High, and Ultra. At each resolution, the average FPS scales inversely with the quality preset, but the differences are small enough that even the most demanding preset stays above 120 FPS at 4K. The Medium preset stands out because it is the only one with recorded minimum and maximum FPS values, giving a clear picture of frame consistency.

At 1920x1080, Medium averages 460 FPS with a minimum of 391 and a maximum of 529. This is 45 FPS below Low (505) but 53 FPS above High (407) and 130 FPS above Ultra (330). At 2560x1440, Medium averages 307 FPS (minimum 261, maximum 353), while Low reaches 337, High 271, and Ultra 220. At 3840x2160, Medium averages 174 FPS (minimum 148, maximum 200), with Low at 191, High at 153, and Ultra at 124.

The data suggests that Medium is the best balance between performance and visual quality. It delivers a comfortable average FPS at all resolutions, and its minimum values stay high enough to avoid noticeable stutter. Low, while faster, sacrifices visual fidelity; Ultra, while visually richer, drops to 124 FPS at 4K, which is still smooth but leaves less headroom. Medium's recorded min/max range also indicates that it is the most predictable preset in terms of frame pacing. Therefore, for a mix of responsiveness and quality, Medium is the recommended preset.

How This Combo Ranks

In Roblox, this CPU‑GPU combination is measured at rank 828 out of 3711 tested combos. That places it in the upper portion of the list, meaning the vast majority of other tested systems produce lower average frame rates in this game. The CPU itself carries a percentile rank of 95 among all CPUs, while the GPU sits at the 84th percentile among all GPUs. These separate percentiles corroborate the overall rank.

The CPU’s average benchmark score is 76212, which is 0.1% higher than the Intel Core Ultra 9 285HX and 0.6% higher than the AMD Ryzen 9 9950X3D, while being 0.4% lower than both the AMD EPYC Embedded 8224P and the AMD Ryzen Threadripper PRO 9945WX. The GPU’s average score is 43667, which is 0.8% above the NVIDIA Quadro M6000, 0.9% above the NVIDIA GeForce RTX 5050 Mobile, and 0.9% above the Quadro M6000 24 GB, but 0.9% below the NVIDIA RTX A6000. These relative positions indicate that the hardware is near the top of its class, and the measured Roblox performance is consistent with that standing.

GPU Role

The NVIDIA GeForce RTX 4090 Mobile brings 16 GB of GDDR6 memory on a 256‑bit bus, delivering 576.0 GB/s of bandwidth. Its base clock is 1335 MHz, with a boost clock of 1695 MHz, and the memory runs at 2250 MHz (18 Gbps effective). The GPU contains 9728 shading units, 304 texture mapping units, 112 ROPs, 76 RT cores, and 304 tensor cores. Its pixel rate is 189.8 GPixel/s, texture rate 515.3 GTexel/s, and FP32 performance is 32.98 TFLOPS.

These specifications are far beyond what Roblox requires. The game’s sandbox environments typically use low‑poly assets and modest texture resolutions, so the GPU is never stressed. The measured frame rates confirm this: even at 4K Ultra, the GPU produces 124 FPS, and at 1080p Low it reaches 505 FPS. The high memory bandwidth and 16 GB VRAM ensure that large, complex worlds with many objects do not cause texture streaming bottlenecks. The GPU’s performance is strong enough that the CPU becomes the primary factor at lower resolutions, as evidenced by the very high FPS numbers that a typical GPU would not saturate.

Measured FPS Breakdown

The table below lists every measured FPS value from the FACT PACK.

| Resolution | Settings | Avg FPS | Min FPS | Max FPS |

|------------|----------|---------|---------|---------|

| 3840x2160 | High | 153 | — | — |

| 3840x2160 | Low | 191 | — | — |

| 3840x2160 | Medium | 174 | 148 | 200 |

| 3840x2160 | Ultra | 124 | — | — |

| 2560x1440 | High | 271 | — | — |

| 2560x1440 | Low | 337 | — | — |

| 2560x1440 | Medium | 307 | 261 | 353 |

| 2560x1440 | Ultra | 220 | — | — |

| 1920x1080 | High | 407 | — | — |

| 1920x1080 | Low | 505 | — | — |

| 1920x1080 | Medium | 460 | 391 | 529 |

| 1920x1080 | Ultra | 330 | — | — |

At 1080p, the average FPS ranges from 330 (Ultra) to 505 (Low). The Medium preset’s minimum of 391 FPS is still higher than the Ultra average, indicating that even the most demanding preset maintains a high floor. At 1440p, the range is 220–337 FPS, and at 4K it is 124–191 FPS. The only preset with min/max data is Medium, which shows a narrow spread: at 1080p, min 391 and max 529; at 1440p, min 261 and max 353; at 4K, min 148 and max 200. This consistency is a strong argument for using Medium.

Resolution Scaling

The resolution scaling pattern is consistent across all four presets. From 1920x1080 to 2560x1440, the average FPS drops by approximately 33–40% depending on the preset (Low: 505→337, Medium: 460→307, High: 407→271, Ultra: 330→220). From 1440p to 4K, the drop is again substantial (Low: 337→191, Medium: 307→174, High: 271→153, Ultra: 220→124). The absolute FPS reduction is similar for both steps, indicating that the GPU is still able to handle the increased pixel load without a sharp cliff.

The high frame rates at 1080p – reaching 505 FPS on Low – suggest that the CPU is the more limiting component at this resolution. The GPU has headroom, as evidenced by the fact that even at 4K it can still produce 124 FPS at Ultra. The scaling behavior is typical of a system where the CPU dominates at low resolutions and the GPU begins to take over at higher ones, but in this case the GPU remains strong enough to keep the frame rate well above typical refresh rates. The data shows that Roblox is not a demanding title for this hardware, and the resolution scaling is smooth.

FAQ

Q: What preset should I use for the best experience?

A: The Medium preset offers the most balanced performance. It is the only preset with recorded minimum and maximum FPS, and it delivers average FPS of 460 (1080p), 307 (1440p), and 174 (4K) with minimums of 391, 261, and 148 respectively, providing a stable experience without sacrificing visual quality.

Q: How does this combo rank among all tested systems in Roblox?

A: It ranks 828th out of 3711 tested combos, placing it in the upper portion of the list. The CPU sits at the 95th percentile and the GPU at the 84th percentile, which aligns with its high overall rank.

Q: Does the RTX 4090 Mobile have sufficient memory for Roblox?

A: Yes. The GPU has 16 GB of GDDR6 memory with a 576.0 GB/s bandwidth. Even at 4K with high‑resolution textures, the data shows no memory‑related bottlenecks, as the average FPS stays above 124.

Q: How does the Ryzen 9 8945HX compare to its closest rivals?

A: The CPU’s average benchmark score is 76212. It is 0.1% higher than the Intel Core i5 285HX and 0.6% higher than the AMD Ryzen 9 9950X3D, while being 0.4% lower than both the AMD EPYC Embedded 8224P and the Threadripper PRO 9945WX.

Q: Is the CPU or the GPU the limiting factor at 1080p?

A: The extremely high FPS at 1080p (up to 505 FPS) indicates that the GPU is not saturated. The CPU’s 16 cores and 32 threads, with a boost clock of 5.40 GHz, likely provide enough processing power to keep the game engine fed, making the CPU the primary limiter at that resolution.

Q: What is the resolution scaling behavior?

A: Average FPS drops from 505 (1080p) to 337 (1440p) to 191 (4K) at Low settings. The same pattern is seen for Medium (460→307→174), High (407→271→153), and Ultra (330→220→124). The absolute drop between each resolution step is similar, indicating a consistent scaling curve.

CPU Role

The AMD Ryzen 9 8945HX is a 16‑core, 32‑thread processor from the 8000 series, built on TSMC’s 5 nm process. Its base clock is 2.50 GHz and boost clock is 5.40 GHz, with a TDP of 55 W. It uses the AMD Socket FL1 and features the Zen 4 architecture (Dragon Range). The CPU has a 64 MB L3 cache, 1 MB L2 per core, and 64 KB L1 per core. It supports dual‑channel DDR5 memory with a bandwidth of 83.2 GB/s and integrates a Radeon 610M GPU.

In synthetic benchmarks, the CPU scores 42713 in Cinebench R23 multi‑core and 6030 in single‑core, while PassMark’s multi‑thread score is 51405. The PassMark single‑thread score is 3907. These numbers are far above what Roblox typically requires. Roblox is a sandbox game that uses many small scripts and physics calculations; a high single‑thread boost clock (5.40 GHz) and 16 cores help handle concurrent world updates and player interactions. The CPU’s 95th percentile ranking among all CPUs supports its role in delivering the high frame rates seen in the measured data. The CPU is clearly not a limiting factor in Roblox, and its strong multi‑threaded performance ensures that the GPU is fully utilized, especially at higher resolutions.