Roblox

Similar Performance Alternatives

The Intel Core i5-9400 sits in a tightly packed range of comparable processors. Its average benchmark score of 2254 places it within 0.4% of the AMD Ryzen 5 PRO 1500, which scores 2246, and within 0.3% of the Intel Core i7-10710U at 2248. The Intel Core i7-1068NG7 is marginally ahead at 2259, a 0.2% difference, while the Intel Core i3-10305 leads this group with a score of 2264, representing a 0.4% gap. These deltas are negligible in real-world gaming, meaning any of these CPUs would deliver nearly identical frame pacing and physics simulation in Roblox.

For the GPU side, the NVIDIA GeForce RTX 3070 sits in a similar tight cluster. Its average benchmark score of 17208 is closely matched by the AMD Radeon RX 7600 XT, which scores 17083 and is 0.7% slower. The NVIDIA GeForce GTX 690 and AMD Radeon HD 7970M both show a 1% deficit at scores of 17037 and 17019 respectively. The NVIDIA Tesla K40c is the only rival in the group that surpasses the RTX 3070, with a score of 17468, representing a 1.5% advantage. These small percentage differences indicate that swapping the RTX 3070 for any of these alternatives would result in virtually indistinguishable frame rates in Roblox, especially given the game's relatively modest graphics demands.

In practice, the data suggests that a system built with the Intel Core i5-9400 and any of its four nearest CPU rivals would behave almost identically. The processor's 47th percentile ranking among all CPUs indicates it is squarely mid-pack, but Roblox is not a CPU-heavy title at standard settings. Similarly, the RTX 3070's 61st percentile ranking among all GPUs is more than sufficient for this game, and the nearest GPU rivals would not meaningfully change the user experience.

CPU and GPU Roles

The measured FPS data across resolutions and presets reveals a system that is overwhelmingly GPU-limited in Roblox, but with an important nuance at the highest settings. At 1920x1080, the gap between Low and Ultra presets is substantial: 413.3 FPS at Low versus 267.6 FPS at Ultra, a difference of 145.7 FPS. This scaling indicates that the GPU is doing the heavy lifting when settings rise, as the CPU maintains a high enough frame ceiling to feed the graphics card.

At 2560x1440, the pattern persists. Low preset yields 275.3 FPS, while Ultra drops to 181.5 FPS, a reduction of 93.8 FPS. The GPU is clearly the performance limiter as resolution climbs, but the CPU's role becomes more pronounced at this resolution. The relative drop from Low to Ultra is 34% at 1440p, while at 4K, the Low to Ultra delta is 54.3 FPS (156.5 to 102.2), a 35% reduction. This consistency suggests the i5-9400 is not bottlenecking the RTX 3070 at any tested resolution.

The most telling comparison is the scaling from 1080p to 4K. At the Ultra preset, the average FPS falls from 267.6 at 1080p to 102.2 at 2160p, a 62% reduction. This steep drop confirms that the GPU is the dominant performance factor. The CPU's six cores and six threads, while modest by modern standards, are more than adequate for Roblox, which is not known for heavy multi-threaded workloads. The data shows that even at 4K Ultra, the system maintains a 102.2 FPS average, which is well above the 60 FPS playability threshold.

The measured FPS values also indicate that this combination performs differently from a typical high-refresh-rate gaming rig. The RTX 3070 is capable of pushing over 400 FPS at 1080p Low, but the game's engine and the CPU's single-thread speed (which ranks in the 47th percentile) prevent it from going much higher. The i5-9400's boost clock of 4.1 GHz is sufficient, but not exceptional, and this shows in the 413.3 FPS ceiling at 1080p Low.

Measured FPS Breakdown

At 1920x1080, the database records a complete set of playable results across all four presets. The Low preset delivers the highest average at 413.3 FPS. Medium follows at 378.7 FPS, High at 334.3 FPS, and Ultra at 267.6 FPS. The progression from Low to Ultra shows a 146.7 FPS drop, which is a 35% reduction. This is a linear decline, with each preset tier costing roughly 35 to 45 FPS.

At 2560x1440, the same pattern holds but with lower overall values. Low average 275.3 FPS, Medium 253.4 FPS, High 220.7 FPS, and Ultra 181.5 FPS. The spread from Low to Ultra is 93.8 FPS, which is a 34% reduction, nearly identical to the 1080p scaling. This suggests that the GPU's compute and memory bandwidth (448.0 GB/s) are sufficient to handle the increased pixel count without causing a disproportionate frame drop.

At 3840x2160, the results are still strong but show the expected diminishing. Low preset averages 156.5 FPS, Medium 145.0 FPS, High 126.8 FPS, and Ultra 102.2 FPS. The Low to Ultra gap narrows to 54.3 FPS, a 35% reduction from Low. This is consistent with the other resolutions, indicating that the RTX 3070 scales linearly with settings even at 4K. Notably, the 4K Ultra result of 102.2 FPS is still 42.2 FPS above the 60 FPS threshold, which is remarkable for a game that is not typically graphics-bound, but the data is clear.

The minimum and maximum FPS values are not recorded in the database, so the analysis relies solely on average. This is a limitation, as stuttering or frame-time spikes cannot be assessed. However, the averages are sufficiently high that even a significant drop below the mean would likely still clear 60 FPS in most scenarios. The fact that all 12 measured points exceed 100 FPS indicates that this combination has no trouble maintaining smooth gameplay.

The Verdict

This Intel Core i5-something and RTX 3070 combination is unequivocally playable at every resolution and preset tested. The verdict by resolution is unanimous: all four settings at all three resolutions clear the 60 FPS threshold. The worst-case scenario is 4K Ultra, which still averages 102.2 FPS, leaving a comfortable 42.2 FPS margin above the playability threshold. The best-case scenario is 1080p Low at 413.3 FPS, which is more than six times the threshold.

The database shows that the RTX 3070 is the dominant component here. The CPU's 47th percentile ranking might raise questions about bottlenecking, but the measured FPS proves otherwise. At 1440p Ultra, the system outputs 181.5 FPS, which is 121.5 FPS above the 60 FPS threshold. At 4K High, the average is 126.8 FPS, and at 4K Medium it is 145.0 FPS. There is no resolution or preset in the recorded data where this system drops below 100 FPS.

The verdict is straightforward: this PC runs Roblox exceptionally well. Users with a 144Hz monitor will be able to take full advantage of the refresh rate at 1080p and 1440p, with Ultra presets yielding 267.6 FPS and 181.5 FPS respectively. Even at 4K, the system is capable of driving a 120Hz display at Ultra settings, since the 102.2 FPS average exceeds 100 FPS. The 60 FPS threshold is an absolute non-issue for this hardware.

Best Settings per Resolution

For 1920x1080, the most demanding preset that stays at or above 60 FPS is Ultra. The average FPS at Ultra is 267.6. This is the maximum visual quality available in the game's settings, and the system handles it with ease. There is no need to compromise on quality at this resolution.

At 2560x1440, the Ultra preset is also the best choice. The recorded average FPS is 181.5, which is 121.5 FPS above the 60 FPS threshold. This allows for high refresh rate gaming on 1440p monitors that support 144Hz or even 165Hz, as the frame average is well above those refresh rates.

At 3840x2160, the Ultra preset remains the optimal selection, with an average of 102.2 FPS. This is 42.2 FPS above the playability threshold, meaning a 4K monitor with a 120Hz refresh rate would not be fully saturated, but a 60Hz monitor would be completely fine. The database does not record any preset that fails to reach 60 FPS at 4K, so the best settings are always Ultra.

In summary, the user can select Ultra at every resolution without any risk of dropping below the 60 FPS playability line. The data does not record any min FPS values, but the average frame rates are so high that even a severe stutter would not push the experience below acceptable playability. The game is not graphically demanding, and this GPU is overqualified for it.

How This Combo Ranks

The Intel Core i5-9400 and NVIDIA GeForce RTX 3070 combination ranks 1566 out of 3711 tested combos in the database for Roblox. This places it in the 57th percentile of all tested hardware combinations. This is a strong ranking, though not elite, and it reflects the fact that the RTX 3070 is a high-end GPU from a previous generation, while the i5-9400 is a mid-range processor from an older generation.

The rank of 1566 means that 2145 other combos perform worse in Roblox, while 1565 combos perform better. The relatively high rank is attributable to the RTX 3070's 61st percentile GPU score, which places it well above the median GPU. The CPU's 47th percentile score pulls the combo down slightly, as more modern processors with higher single-thread scores could push frame rates slightly higher in CPU-bound scenarios. However, the measured FPS show that the GPU is the limiting factor at all resolutions, so the CPU's lower percentile does not materially affect the gaming experience.

The combo's rank is better than its individual component percentiles would suggest. The RTX 3070 is the 61st percentile GPU, and the i5-9400 is the 47th percentile CPU. The combination ranks in the 57.8th percentile, which indicates that the pairing is more effective than the sum of its parts. This is because Roblox is not a demanding game, and the GPU has more than enough headroom to compensate for the CPU's modest performance. The rank of 1566 out of 3711 places this combo in the upper half of all tested systems, and for a game like Roblox, it is more than sufficient.