Roblox

How This Combo Ranks: position among all tested pairs:

The recorded data places the Intel Core i5-9400 paired with RTX 4070 at rank 845 out of 3711 tested combos for this game. This position is notable when considering the CPU is a six-core, six-thread Coffee Lake part from 2018 that sits at the 47th percentile among all CPUs in the database. The GPU, an RTX 4070, is a significantly more powerful component, ranking in the 81st percentile among all GPUs. The combination of an older mid-range CPU with a newer high-end GPU creates an interesting bottleneck dynamic, but the measured FPS numbers indicate that this pairing still lands in the top 23% of all recorded system configurations. The rank of 845 suggests that while many faster combos exist, this specific pairing is far from the bottom of the pile, and the massive FPS headroom measured in the game confirms that the system is not being held back at most settings.

CPU and GPU Roles

The data shows a clear pattern where the GPU becomes the dominant factor as resolution increases, while the CPU's influence wanes. At 1920x1080, the gap between Low and Ultra settings is 174.7 FPS (504.2 vs 329.5), which indicates that the GPU is doing most of the work to differentiate settings. However, at this resolution, the CPU is more likely to be a limiting factor in pushing higher frame rates. The jump from Low to Medium at 1080p is 48 FPS, and from Medium to High is another 49.2 FPS, showing the GPU scaling well with settings.

When moving to 2560x1440, the pattern shifts slightly. The difference between Low (336 FPS) and Ultra (221.7 FPS) is 114.3 FPS, which is a smaller absolute gap than at 1080p. This suggests that at 1440p, the GPU is starting to become more saturated, and the CPU's role in maintaining high frame rates diminishes. At 3840x2160, the gap between Low (190.7 FPS) and Ultra (125.9 FPS) is 64.8 FPS, an even smaller difference. This is a classic sign of GPU-bound scaling: as resolution increases, the GPU is working harder on each frame, and the CPU has more time to prepare the next frame, making the CPU less of a bottleneck.

The interesting question is what happens at 4K with Low settings. The 190.7 FPS figure is still far above the 60 FPS threshold, meaning even at the highest resolution with the lowest settings, the GPU is not fully maxed out. The scaling from 1440p Low (336 FPS) to 4K Low (190.7 FPS) is a 43% drop, which is roughly in line with the pixel count increase. This indicates that the GPU is the primary driver of performance at all resolutions, but the CPU's older architecture (Coffee Lake, 14 nm process) may be holding back the absolute maximum frame rates at 1080p, where the GPU could theoretically push even higher numbers if paired with a newer CPU.

Measured FPS Breakdown

At 1920x1080, the recorded average FPS across all four presets is as follows: Low settings produce 504.2 FPS, Medium produces 456.2 FPS, High produces 407 FPS, and Ultra produces 329.5 FPS. The gap between Low and Ultra is 174.7 FPS, which is a 34.6% reduction in performance when moving to the highest quality preset. The step from High to Ultra is the largest single drop, at 77.5 FPS, while the step from Low to Medium is 48 FPS and from Medium to High is 49.2 FPS. This pattern suggests that the Ultra preset introduces effects (likely shadows, lighting, or post-processing) that are significantly more demanding than High.

At 2560x1440, the numbers are lower but still very high. Low settings record 336 FPS, Medium records 303.5 FPS, High records 268.6 FPS, and Ultra records 221.7 FPS. The drop from Low to Ultra is 114.3 FPS, which is a 34% reduction, similar to the percentage drop at 1080p. The step from High to Ultra at 1440p is 46.9 FPS, which is less than the 77.5 FPS drop at 1080p, indicating that the GPU is becoming more of a limiting factor and the relative cost of Ultra is slightly lower.

At 3840x2160, the measured FPS are still comfortably above 60. Low settings produce 190.7 FPS, Medium produces 171.3 FPS, High produces 152.4 FPS, and Ultra produces 125.9 FPS. The total drop from Low to Ultra is 64.8 FPS, a 34% reduction, which is consistent with the other resolutions. The step from High to Ultra is 26.5 FPS, which is the smallest absolute drop among all resolutions. This consistency in percentage scaling (all around 34%) across resolutions indicates that the game's settings have a multiplicative effect on GPU load, and the CPU is not introducing any unexpected stutters or frame drops at higher resolutions.

It is important to note that the data does not include min or max FPS values, so the analysis relies solely on average FPS. This means frame time consistency cannot be assessed from the recorded data, but the high averages suggest that the system is unlikely to dip below the 60 FPS threshold in typical gameplay.

Similar Performance Alternatives

The CPU's nearest rivals in the database are all within a very tight performance band. The Intel Core i7-1068NG7 scores 2259, which is 0.2% higher than the i5-9400's 2254 average benchmark score. The Intel Core i7-10710U scores 2248, which is 0.3% lower. The AMD Ryzen 5 PRO 1500 scores 2246, which is 0.4% lower, and the Intel Core i3-10305 scores 2264, which is 0.4% higher. These deltas are all under half a percent, meaning that swapping the i5-9400 for any of these CPUs would result in virtually identical performance in Roblox, as the game is likely GPU-bound at most settings. The i7-1068NG7 and i3-10305 are the closest matches, with the i3-10305 being slightly faster on average.

On the GPU side, the RTX 4070's nearest rivals show a similar pattern of very close scores. The NVIDIA Tesla P4 scores 37628, which is 0.1% lower than the RTX 4070's 37648. The AMD Radeon RX Vega 56 scores 37507, which is 0.4% lower. The NVIDIA GeForce RTX 4080 Mobile scores 38135, which is 1.3% higher, and the AMD Radeon PRO W6400 scores 37157, which is 1.3% lower. The RTX 4080 Mobile is the fastest alternative here, but the 1.3% delta is negligible for gaming purposes. The Tesla P4 is a data center card that would not be a practical choice for gaming, but its raw compute score is nearly identical. The RX Vega 56, despite being an older architecture, is only 0.4% behind, which is surprising given the generational gap. In practice, any of these GPUs would deliver essentially the same FPS in Roblox, with the RTX 4080 Mobile potentially being a few frames faster at 4K Ultra.

Best Settings per Resolution

At 3840x2160, the most demanding preset that stays at or above 60 FPS is Ultra, which records an average of 125.9 FPS. This is more than double the playable threshold, so the system has significant headroom. At 2560x1440, the Ultra preset also delivers the best experience, with an average of 221.7 FPS. At 1920x1080, the Ultra preset records 329.5 FPS. In all three resolutions, the Ultra preset is the only one that needs to be considered, as even the most demanding settings are far above the 60 FPS threshold. The data shows that the system is capable of running the game at maximum quality at every resolution tested, with the lowest average FPS being 125.9 at 4K Ultra.

The scaling from 1080p Ultra to 1440p Ultra is a 32.7% drop (329.5 to 221.7 FPS), and from 1440p Ultra to 4K Ultra is a 43.2% drop (221.7 to 125.9 FPS). This suggests that the game is more demanding at 4K, but the RTX 4070 has enough compute headroom to handle it. For players with 4K displays, the Ultra preset is not only playable but also provides a very smooth experience. For players with 1080p or 1440p displays, the system is effectively overkill, as the FPS numbers are high enough to take advantage of high refresh rate monitors.

The Verdict

The recorded data indicates that this PC can run Roblox at all tested resolutions and presets with no issues. The verdictByResolution field confirms that all four settings (Low, Medium, High, Ultra) are playable at every resolution, with the best settings being Ultra at each. At 3840x2160, the best setting is Ultra with an average of 125.9 FPS, which clears the 60 FPS threshold by a wide margin. At 2560x1440, the best setting is Ultra with 221.7 FPS, and at 1920x1080, the best setting is Ultra with 329.5 FPS.

The system is clearly GPU-bound at higher resolutions, but the RTX 4070 is powerful enough that the CPU bottleneck never becomes a problem. The lowest measured FPS in the entire dataset is 125.9 FPS at 4K Ultra, which is still more than double the playable threshold. This means that players can enable all graphical features without worrying about frame rate drops. The only caveat is that the data does not include min or max FPS, so there could be brief dips during intense scenes, but the high averages suggest that any dips would still be well above 60 FPS. In summary, this combination is more than capable of delivering a smooth, high-quality experience in Roblox at any resolution.

FAQ

Q: Can this PC run Roblox at 4K Ultra settings?

A: Yes, the recorded data shows an average of 125.9 FPS at 3840x2160 with Ultra settings, which is well above the 60 FPS playable threshold.

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

A: The highest average FPS is 504.2 at 1920x1080 with Low settings.

Q: Is the CPU or GPU more important for this game at 1080p?

A: At 1920x1080, the GPU is the primary driver, as shown by the large FPS drop from Low (504.2) to Ultra (329.5). The CPU's role is less critical at this resolution compared to higher ones.

Q: How much faster is the RTX 4070 compared to its nearest rival?

A: The RTX 4070 has an average benchmark score of 37648, which is 0.1% higher than the NVIDIA Tesla P4 (37628) and 0.4% higher than the AMD Radeon RX Vega 56 (37507).

Q: What is the best settings preset for a 1440p monitor?

A: The Ultra preset delivers an average of 221.7 FPS at 2560x1440, making it the best choice for maximum quality without any performance concerns.

Q: Does this combo ever drop below 60 FPS?

A: Based on the average FPS data, the lowest recorded average is 125.9 FPS at 4K Ultra, so the system stays well above 60 FPS in all tested scenarios.