Roblox

The Intel Core i5-9400 paired with the NVIDIA GeForce RTX 3070 delivers exceptional frame rates in Roblox, with the data showing that even the most demanding preset at 4K remains comfortably above playable thresholds. The measured results place this combination in the 819th position out of 1800 tested combos, indicating that while it is not at the absolute top, it sits in the upper half of all configurations for this title. Across all resolutions, the RTX 3070 demonstrates significant headroom, with the CPU becoming the primary limiting factor at lower settings where frame rates exceed 400 FPS. The following analysis breaks down the measured data to provide clear guidance on optimal settings and expected performance.

FAQ

Q: What is the highest average frame rate recorded for this combination?

A: The highest measured average FPS is 413.3, achieved at 1920x1080 resolution with Low settings. This indicates the engine's frame rate ceiling is well above typical display refresh rates.

Q: How does the RTX 3070 compare to its closest rival in raw benchmark scores?

A: The RTX 3070 has an average benchmark score of 28238, placing it 0.9% ahead of the AMD Radeon RX 6600 XT (27985) and 1% ahead of the NVIDIA GeForce GTX 980 Ti (27956), while trailing the AMD FirePro S7150 by 0.6%.

Q: Is the CPU or GPU the bottleneck at 1080p?

A: At 1080p with Low settings, the 413.3 FPS result suggests the Intel Core i5-9400 is the limiting factor, as the GPU has enough headroom to render far more frames than the CPU can feed it. The CPU's 50th percentile ranking versus all CPUs supports this.

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

A: At 3840x2160, the average FPS drops from 156.5 on Low to 102.2 on Ultra, representing a 34.7% reduction in frame rate when moving to the highest preset.

Q: Does the RTX 3070's 8 GB VRAM become a limitation in Roblox?

A: No, the measured data does not indicate VRAM limitations. The lowest 4K average FPS of 102.2 on Ultra suggests the GPU's memory capacity and bandwidth are sufficient for this game's demands.

Q: How does the i5-9400's multi-core performance compare to its nearest rival?

A: The i5-9400 scores 2305 on average, which is 0.2% ahead of the Intel Core i3-10305 (2300) and 0.4% ahead of the Intel Xeon E-2134 (2295), while trailing the Intel Core i7-8809G by 0.6%.

Settings Recommendations

The measured data provides a clear hierarchy across all resolutions: Low settings deliver the highest frame rates, followed by Medium, High, and Ultra in descending order. For competitive play or high-refresh-rate monitors at 1080p, Low settings produce 413.3 FPS, which far exceeds the refresh rate of most displays. However, Medium settings at 378.7 FPS offer a better balance, providing only an 8.4% reduction in performance while likely improving visual quality.

At 1440p, Medium settings at 253.4 FPS represent the sweet spot, as they maintain frame rates above 240 Hz thresholds while offering more visual fidelity than Low. High settings at 220.7 FPS are also viable for 144 Hz displays. At 4K, the data shows that High settings at 126.8 FPS are the optimal choice, comfortably exceeding 120 Hz refresh rates while providing substantial visual upgrades over Medium (145 FPS) and Low (156.5 FPS). Ultra settings at 4K drop to 102.2 FPS, which is still playable but sacrifices the smoothness available at High.

The recommendation is to prioritize High settings for 4K users, Medium for 1440p, and either Medium or Low for 1080p depending on whether the user prefers maximum frame rates or improved visuals. Ultra settings are only advisable at 1080p (267.6 FPS), where the performance hit is less noticeable relative to the high base frame rate.

Resolution Scaling

The frame rate scaling from 1080p to 4K reveals a predictable pattern across all settings, with the GPU becoming more involved as resolution increases. At Low settings, the average FPS drops from 413.3 at 1080p to 275.3 at 1440p (a 33.4% reduction), and further to 156.5 at 4K (a 62.1% reduction from 1080p). This steep decline indicates that the RTX 3070's rendering workload scales significantly with pixel count, even in a lightweight title like Roblox.

For High settings, the progression is 334.3 FPS at 1080p, 220.7 FPS at 1440p, and 126.8 FPS at 4K. The percentage drop from 1080p to 1440p is 34%, and from 1080p to 4K is 62.1%, showing consistent scaling behavior. The Ultra preset follows a similar curve: 267.6 FPS at 1080p, 181.5 FPS at 1440p, and 102.2 FPS at 4K, representing a 32.2% drop to 1440p and a 61.8% drop to 4K.

The near-identical percentage reductions across all presets suggest that the scaling is resolution-bound rather than settings-bound. This indicates the RTX 3070's 448.0 GB/s memory bandwidth and 20.31 TFLOPS compute capacity are the primary determinants of frame rate at higher resolutions, while at 1080p, the i5-9400's six cores and six threads become the limiting factor, as evidenced by the relatively smaller gap between Low (413.3 FPS) and High (334.3 FPS) compared to the resolution scaling.

Measured FPS Breakdown

At 1920x1080, the Intel Core i5-9400 and RTX 3070 combination produces its highest frame rates. The Low preset averages 413.3 FPS, Medium averages 378.7 FPS, High averages 334.3 FPS, and Ultra averages 267.6 FPS. The spread between Low and Ultra is 145.7 FPS, indicating that settings have a moderate impact at this resolution, but even the lowest preset remains far above any practical display refresh rate.

Moving to 2560x1440, the averages are 275.3 FPS on Low, 253.4 FPS on Medium, 220.7 FPS on High, and 181.5 FPS on Ultra. The gap between Low and Ultra narrows to 93.8 FPS, showing that resolution scaling compresses the settings-based differences. All presets at 1440p remain above 180 FPS, making this resolution ideal for high-refresh-rate gaming without compromise.

At 3840x2160, the frame rates are 156.5 FPS on Low, 145 FPS on Medium, 126.8 FPS on High, and 102.2 FPS on Ultra. The spread between Low and Ultra is now just 54.3 FPS, demonstrating that at 4K, the GPU's workload is dominated by pixel throughput rather than settings complexity. The data shows that even at 4K Ultra, the average FPS remains above 100, which is a strong result for a sandbox title.

The overall pattern is consistent: Low settings provide the highest frame rates at every resolution, and the relative performance penalty for Ultra increases as resolution decreases. This suggests that for users with 1080p displays, Ultra settings are entirely viable at 267.6 FPS, while 4K users should stick to High to maintain a 120+ FPS experience.

GPU Role

The NVIDIA GeForce RTX 3070, built on the Ampere architecture with a GA104 chip, plays a significant role in Roblox performance, particularly at higher resolutions. Its 8 GB of GDDR6 memory on a 256-bit bus delivers 448.0 GB/s of bandwidth, which the measured results indicate is sufficient to prevent memory-related bottlenecks even at 4K Ultra settings. The GPU's base clock of 1500 MHz and boost clock of 1725 MHz contribute to its 20.31 TFLOPS of FP32 compute, a figure that appears more than adequate for Roblox's rendering demands.

The RTX 3070's 5888 shading units and 184 texture mapping units provide substantial fill rate capabilities, with a pixel rate of 165.6 GPixel/s and texture rate of 317.4 GTexel/s. These specifications align with the observed frame rates: at 4K Ultra, the 102.2 FPS average implies the GPU is processing roughly 830 million pixels per second, well within its theoretical pixel throughput. The 96 ROPs ensure efficient output to the display, and the 46 RT cores and 184 tensor cores, while not directly utilized by Roblox's traditional rendering pipeline, contribute to the card's overall versatility.

The GPU's benchmark data reinforces its position: a 3DMark Steel Nomad DX12 score of 3162 and a Passmark G3D score of 22214 place it in the 72nd percentile of all GPUs. Its nearest rivals include the AMD Radeon RX 6600 XT (0.9% slower) and the NVIDIA GeForce GTX 980 Ti (1% slower), while the AMD FirePro S7150 (0.6% faster) and AMD Radeon R9 M295X (1.1% faster) edge ahead. The RTX 3070's 220 W TDP and dual-slot design with a 1x 12-pin connector indicate a power-hungry component, but the measured performance justifies this in Roblox, where the card never dips below 100 FPS even at the most demanding settings tested.