Roblox

Similar Performance Alternatives

The Intel Core i5-9400 sits at the 47th percentile among all CPUs in the database, with an average benchmark score of 2254. The nearest rivals are extremely tight clusters. The AMD Ryzen 5 PRO 1500 scores 2246, a 0.4% difference. The Intel Core i7-10710U scores 2248, a 0.3% difference. The Intel Core i7-1068NG7 scores 2259, a 0.2% difference. The Intel Core i3-10305 scores 2264, a 0.4% difference. These four chips all fall within a 0.8% band of the i5-9400, meaning a user moving between any of these CPUs would see virtually identical frame pacing in CPU-bound scenarios. The i5-9400's six cores and six threads, combined with a 2.90 GHz base clock and 4.10 GHz boost clock, place it in the middle of this pack. Its 9 MB shared L3 cache and dual-channel DDR4 memory support are typical for this performance tier.

On the GPU side, the NVIDIA GeForce RTX 5070 holds the 82nd percentile among all GPUs, with an average benchmark score of 40377. Its nearest rivals are again a tight cluster. The AMD Radeon Pro 580 scores 40318, a 0.1% difference. The AMD Radeon Pro WX 7100 scores 40063, a 0.8% difference. The AMD Radeon Pro 5300 scores 40870, a 1.2% difference. The NVIDIA RTX A500 Mobile scores 39568, a 2% difference. All four of these GPUs sit within a 3.2% spread, making them functionally interchangeable for Roblox workloads. The RTX 5070's 12 GB of GDDR7 memory on a 192-bit bus delivers 672.0 GB/s of bandwidth, which is far beyond what Roblox demands, but the headroom explains why the measured frame rates are so high across all settings.

For a user assembling a system around this combo, the data suggests that swapping the i5-9400 for any of its four nearest CPU rivals would not change Roblox performance meaningfully. Similarly, swapping the RTX 5070 for any of its four nearest GPU rivals would keep frame rates within a few percent. The bottleneck in this pairing will not come from either component at any tested resolution.

How This Combo Ranks

This specific combination of the Intel Core i5-9400 and NVIDIA GeForce RTX 5070 ranks 726th out of 3711 tested combos in Roblox. That places it in the top 19.6% of all recorded configurations. The rank reflects the CPU's modest position (47th percentile) combined with the GPU's strong position (82nd percentile). Since Roblox is not a demanding title, the GPU's high percentile dominates the outcome, pushing the combo well above the median.

The measured frame rates confirm this ranking. At 1920x1080, even the most demanding preset (Ultra) delivers 356.8 FPS, which is nearly six times the 60 FPS playable threshold. At 2560x1440, Ultra delivers 237 FPS, nearly four times the threshold. At 3840x2160, Ultra delivers 135.6 FPS, still more than double the threshold. Every resolution and preset combination in the database clears 60 FPS, with the lowest recorded average being 135.6 FPS at 4K Ultra.

The rank of 726 out of 3711 is driven by the fact that many combos pair newer or higher-end CPUs with the RTX 5070 or similar GPUs. However, the i5-9400 does not hold this combo back in Roblox specifically. The data shows that the game is far more dependent on GPU throughput than CPU single-thread performance, and the RTX 5070 provides an overwhelming amount of that throughput.

FAQ

Q: What is the playable threshold for Roblox in this database?

A: The playable threshold is 60 FPS. All measured settings at all three resolutions exceed this threshold by a wide margin.

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

A: Yes. The recorded average FPS at 3840x2160 with Ultra settings is 135.6 FPS, which is more than double the 60 FPS threshold.

Q: How does the RTX 5070 compare to its nearest GPU rivals?

A: The RTX 5070 has an average benchmark score of 40377. The AMD Radeon Pro 580 scores 40318 (0.1% lower), the AMD Radeon Pro WX 7100 scores 40063 (0.8% lower), the AMD Radeon Pro 5300 scores 40870 (1.2% higher), and the NVIDIA RTX A500 Mobile scores 39568 (2% lower). All are within a 3.2% spread.

Q: What is the best settings preset at 2560x1440 for this combo?

A: The best preset that stays at or above 60 FPS is Ultra, which delivers 237 FPS on average. This is the most demanding preset and it clears the threshold comfortably.

Q: Does lowering settings from Ultra to Low provide a large FPS gain at 1080p?

A: Yes. At 1920x1080, Low delivers 541.5 FPS while Ultra delivers 356.8 FPS. That is a 184.7 FPS difference, or roughly 51.8% higher frame rate at Low compared to Ultra.

Q: How does the i5-9400 compare to its nearest CPU rivals?

A: The i5-9400 has an average benchmark score of 2254. The Intel Core i7-1068NG7 scores 2259 (0.2% higher), the Intel Core i7-10710U scores 2248 (0.3% lower), the AMD Ryzen 5 PRO 1500 scores 2246 (0.4% lower), and the Intel Core i3-10305 scores 2264 (0.4% higher). All are within a 0.8% band.

The Verdict

This PC can absolutely run Roblox at every resolution and preset combination recorded in the database. The verdict by resolution is unambiguous. At 3840x2160, all four presets (Low, Medium, High, Ultra) clear 60 FPS, with Ultra delivering 135.6 FPS. At 2560x1440, all four presets clear 60 FPS, with Ultra delivering 237 FPS. At 1920x1080, all four presets clear 60 FPS, with Ultra delivering 356.8 FPS.

The lowest recorded frame rate across all twelve measurements is 135.6 FPS at 4K Ultra. This is more than double the playable threshold. The highest recorded frame rate is 541.5 FPS at 1080p Low. No setting combination in the entire measurement set comes close to dropping below 60 FPS. The combo rank of 726 out of 3711 further confirms that this is a well-performing configuration, though the raw frame rates tell the more direct story.

The GPU's 82nd percentile ranking and the CPU's 47th percentile ranking combine to produce a system that has massive GPU headroom for this title. Users who own high refresh rate monitors will be able to take advantage of them, especially at 1080p and 1440p. Even at 4K, the frame rates are high enough for a 120 Hz or 144 Hz display.

CPU and GPU Roles

The data shows that the GPU dominates performance scaling in Roblox, but the CPU still matters at lower resolutions. At 1920x1080, moving from Ultra (356.8 FPS) to Low (541.5 FPS) produces a 184.7 FPS gain. At 2560x1440, the same preset change goes from 237 FPS to 363.2 FPS, a 126.2 FPS gain. At 3840x2160, the change goes from 135.6 FPS to 205.2 FPS, a 69.6 FPS gain.

The scaling pattern reveals that as resolution increases, the absolute FPS gain from lowering settings shrinks. This is typical of GPU-bound workloads: at 4K, the GPU is working harder per frame, so the relative impact of preset changes is compressed. At 1080p, the GPU has so much spare throughput that lowering settings allows it to stretch its legs further.

However, the CPU's role becomes more apparent at lower resolutions. At 1080p, the i5-9400 must feed frames to the RTX 5070 at rates exceeding 500 FPS on Low settings. The fact that it maintains 541.5 FPS average indicates that the CPU is not a hard bottleneck even at that extreme frame rate. The i5-9400's six cores and six threads, with a 4.10 GHz boost clock, are sufficient for Roblox's single-threaded and lightly threaded workloads.

At 1440p and 4K, the GPU becomes the clear limiting factor, though it is never actually limited in the sense of dropping below 60 FPS. The RTX 5070's 30.87 TFLOPS of FP32 performance and 672.0 GB/s of memory bandwidth provide far more headroom than Roblox requires. The data indicates that the GPU is the primary driver of frame rate differences between presets, while the CPU only matters at the extreme high-FPS end of 1080p.

Best Settings per Resolution

At 1920x1080, the most demanding preset that stays at or above 60 FPS is Ultra, which delivers 356.8 FPS on average. This is the highest preset available and it clears the threshold by a factor of nearly six. Users with 360 Hz monitors could approach the refresh rate ceiling, though the average of 356.8 FPS is slightly below that mark.

At 2560x1440, the most demanding preset that stays at or above 60 FPS is also Ultra, delivering 237 FPS on average. This is more than sufficient for any 144 Hz or 240 Hz monitor at this resolution. The 237 FPS figure represents a 34.9% reduction compared to 1080p Ultra, but it remains far above the playable threshold.

At 3840x2160, the most demanding preset that stays at or above 60 FPS is Ultra, delivering 135.6 FPS on average. This is the only resolution where the frame rate drops below the 200 FPS mark, but it still clears 60 FPS by more than double. For 4K gaming, this is a strong result. The 135.6 FPS average at 4K Ultra represents a 42.8% reduction from 1440p Ultra, which is consistent with the increased pixel count.

In all three resolutions, the recommendation is to use Ultra settings. There is no scenario in the recorded data where a lower preset is needed to maintain playability. The RTX 5070's performance headroom is so large that the most demanding preset is always the best choice. Users who want maximum frame rates for competitive play could drop to Low settings, which yields 541.5 FPS at 1080p, but the visual quality trade-off is not necessary for achieving 60 FPS at any resolution.