Roblox

Roblox is a notoriously CPU-bound sandbox title, and pairing a six-core Intel Core i5-11400F with an NVIDIA GeForce RTX 5070 produces a fascinating dataset that illustrates this bottleneck clearly. The measured frames per second (FPS) across resolutions and settings tell a story of a processor working near its limits while the GPU waits for instructions. This analysis breaks down the measured results, focusing on what the numbers reveal about the system's performance characteristics in this specific game.

Resolution Scaling

The FPS drop from 1080p to 4K is the most telling indicator of where the performance ceiling lies. At 1920x1080 with High settings, the combo achieves 434.3 FPS. Moving to 2560x1440, that figure falls to 289.1 FPS, a reduction of 145.2 FPS. At 3840x2160, the average settles at 167.9 FPS. This scaling pattern is steep, but the absolute numbers at 1080p are the key clue.

At 1080p Low settings, the system hits 544 FPS. This is an extraordinary number for any game, and it strongly suggests that the CPU is the limiting factor. If the GPU were the primary constraint, we would expect to see a much larger gap between the Low and High presets at the same resolution. Instead, the gap between 1080p Low (544 FPS) and 1080p High (434.3 FPS) is only 109.7 FPS. When the resolution increases to 4K, the gap between Low (202.9 FPS) and High (167.9 FPS) shrinks to just 35 FPS. This compression of the performance delta as resolution rises indicates that at 4K, the GPU is finally becoming a more significant factor, but at 1080p, the CPU is the clear bottleneck.

The data implies that the RTX 5070 is underutilized at lower resolutions. The 4K Ultra preset drops to 132.5 FPS, which is still highly playable, but the scaling from 1440p to 4K shows a 106.4 FPS drop for the Ultra preset (238.9 to 132.5). This suggests that while the GPU is capable of handling the higher pixel count, the CPU's ability to feed it data becomes increasingly strained as the frame rate targets rise.

FAQ

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

A: The highest measured average is 544 FPS, achieved at 1920x1080 with Low settings.

Q: How does the Ultra preset at 1440p compare to the High preset at 1080p?

A: The Ultra preset at 2560x1440 produces 238.9 FPS, while the High preset at 1920x1080 produces 434.3 FPS. This shows a 195.4 FPS advantage for the lower resolution and lower settings.

Q: Is the CPU or GPU more likely to be the bottleneck at 1080p?

A: The data strongly indicates a CPU bottleneck at 1080p. The relatively small FPS difference between Low (544) and High (434.3) presets at the same resolution suggests that the CPU is the limiting factor, as the GPU is capable of rendering far more frames than the processor can prepare.

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

A: At 3840x2160, the Low preset averages 202.9 FPS, while the Ultra preset averages 132.5 FPS. This is a difference of 70.4 FPS, showing that the GPU has more headroom to work with at this resolution.

Q: What is the combo's ranking among all tested combinations in this game?

A: The combo ranks 366th out of 1800 tested combinations.

Q: How does the i5-11400F compare to its nearest rival in synthetic benchmarks?

A: The i5-11400F has an average benchmark score of 17181, which is statistically tied with the AMD Ryzen 7 5700U (17189, 0% delta) and the Intel Core i7-1260P (17212, -0.2% delta).

CPU Role

The Intel Core i5-11400F is a six-core, twelve-thread processor based on the Rocket Lake architecture. Its base clock is 2.60 GHz with a boost clock of 4.40 GHz. These specifications, particularly the boost clock, are crucial for Roblox, which often relies on a few fast cores rather than many threads. The CPU's single-thread performance is evidenced by its 3DMark single-thread score of 868 and its Cinebench R23 single-core score of 2029.

In this game, the CPU's role is to process game logic, physics, and draw calls. The measured FPS data suggests that at 1080p, the CPU is working at its maximum capacity. The fact that lowering settings from High to Low only yields a 109.7 FPS increase at 1080p implies that the CPU is the primary constraint. The 12 MB of shared L3 cache and DDR4 memory support are adequate, but the CPU's overall throughput appears to be the wall that prevents higher frame rates.

The processor's percentile ranking against all CPUs is 75, indicating it performs better than most. Its average benchmark score of 17181 is essentially identical to its nearest rivals, showing that it is a solid mid-range performer. The data implies that while the i5-11400F is a competent processor, it is the limiting factor in this specific pairing at lower resolutions, preventing the RTX 5070 from reaching its full potential.

Measured FPS Breakdown

The dataset provides a comprehensive look at performance across three resolutions and four settings presets. At 1920x1080, the average FPS ranges from a low of 356.2 on Ultra to a high of 544 on Low. The Medium preset achieves 492.3 FPS, while High delivers 434.3 FPS. This shows a clear progression, but the differences between presets are not as large as one might expect if the GPU were the bottleneck.

Moving to 2560x1440, the frame rates drop significantly. Low settings produce 363.8 FPS, Medium delivers 329.4 FPS, High drops to 289.1 FPS, and Ultra bottoms out at 238.9 FPS. The scaling here is more linear, suggesting that the GPU is starting to have a more balanced role with the CPU.

At 3840x2160, the results are lower still. Low settings average 202.9 FPS, Medium achieves 189.5 FPS, High produces 167.9 FPS, and Ultra drops to 132.5 FPS. The performance gap between Low and Ultra at 4K is 70.4 FPS, which is proportionally larger than at 1080p. This indicates that at 4K, the GPU is becoming the more dominant limiting factor, as the increased resolution requires more pixel processing power.

GPU Role

The NVIDIA GeForce RTX 5070 is a powerful GPU based on the Blackwell 2.0 architecture. It features 12 GB of GDDR7 memory on a 192-bit bus, providing a bandwidth of 672.0 GB/s. The GPU's boost clock is 2512 MHz, and it has 6144 shading units. These specifications make it a high-end card, capable of handling demanding games at high resolutions and settings.

In Roblox, the GPU's role is to render the graphics. The measured data shows that the RTX 5070 is not being fully utilized at lower resolutions. At 1080p, the frame rates are so high that the GPU is likely idling and waiting for the CPU to send more work. The GPU's Passmark G3D score is 29137, and its percentile ranking is 83, indicating strong performance. However, the data shows that this power is largely wasted at 1080p in this game.

At 4K, the GPU's role becomes more significant. The drop from 202.9 FPS on Low to 132.5 FPS on Ultra demonstrates that the GPU is now working harder to render the higher pixel count. The RTX 5070's 12 GB VRAM is more than sufficient for Roblox, even at 4K, as the game is not particularly demanding on memory. The GPU's synthetic benchmark scores, such as its 3DMark Steel Nomad DX12 score of 5077, indicate that it is a top-tier performer, but the Roblox data suggests that its potential is limited by the CPU in most scenarios.

Settings Recommendations

Based on the measured FPS data, the optimal settings depend heavily on the target resolution and refresh rate. For 1080p displays, the High preset at 434.3 FPS is likely the best choice, as it offers a significant visual improvement over Low (544 FPS) without a massive performance penalty. The Ultra preset at 356.2 FPS is also viable for high-refresh-rate monitors, but the marginal visual gains may not justify the 78.1 FPS drop from High.

At 1440p, the High preset at 289.1 FPS is an excellent choice for most users, providing a smooth experience on 144Hz or even 240Hz monitors. The Medium preset at 329.4 FPS is a good alternative for those seeking even higher frame rates, while the Ultra preset at 238.9 FPS is still very playable and offers the best visual fidelity.

For 4K gaming, the Medium preset at 189.5 FPS is the recommended balance between visual quality and performance. The High preset at 167.9 FPS is also a strong contender, providing a slightly better image with a modest performance cost. The Ultra preset at 132.5 FPS is playable but represents a significant performance hit for the highest quality settings. The Low preset at 202.9 FPS is not recommended, as the visual downgrade is severe and the performance gain over Medium is relatively small.

How This Combo Ranks

The combination of the Intel Core i5-11400F and NVIDIA GeForce RTX 5070 ranks 366th out of 1800 tested combinations in Roblox. This places it in the top 20.3% of all tested systems, which is a strong showing. However, the ranking suggests that while this is a capable setup, there are many other combinations that achieve higher frame rates in this specific game.

The ranking is likely influenced by the CPU bottleneck identified in this analysis. Many other combos may feature more powerful CPUs that can better feed the RTX 5070, allowing it to achieve higher FPS at lower resolutions. The data suggests that this combo is well-suited for 1440p and 4K gaming, where the GPU is more of a factor, but it may not be the optimal choice for competitive 1080p play where CPU performance is paramount.

The CPU's nearest rivals, such as the AMD Ryzen 7 5700U and Intel Core i7-1260P, have nearly identical average benchmark scores. This indicates that the CPU is not an outlier in its performance class. The GPU's nearest rivals, including the NVIDIA GeForce RTX 3090, have similar average scores, showing that the RTX 5070 is a high-performing card. The combination's overall rank of 366 out of 1800 confirms its capabilities, but the data clearly shows that the CPU is holding back the GPU in this particular game.