Roblox

Roblox is a sandbox title that is notoriously light on GPU demands, yet the measured data for the Intel Core i5-11400F and NVIDIA GeForce RTX 4080 SUPER combination reveals a system capable of extreme frame rates across all settings and resolutions. The benchmark results show a clear hierarchy where the CPU becomes the primary bottleneck at lower resolutions, while the GPU's immense power is only fully utilized at 4K with the highest settings. This analysis walks through the measured FPS data to determine the optimal experience, the role of each component, and how this specific pairing stacks up against other tested configurations.

Settings Recommendations

The measured FPS data indicates that the "Ultra" preset provides the most balanced experience for this hardware combination, but the choice depends heavily on the target resolution and refresh rate. At 1920x1080, the Ultra preset delivers an average of 417 FPS, which is still exceptionally high and only 123 FPS lower than the Low preset's 640 FPS. The gap between Medium and High at 1080p is relatively small, with Medium at 582 FPS and High at 515 FPS, suggesting that the visual fidelity gains from Ultra come at a moderate performance cost. For users with 144Hz or 240Hz monitors, the Ultra preset at 1080p is the recommended choice because it maintains frame rates well above the refresh rate threshold while providing the best image quality.

At 2560x1440, the Ultra preset averages 279 FPS, which remains far beyond the capabilities of most high-refresh-rate monitors. The Medium preset at 1440p achieves 388 FPS, while High sits at 343 FPS and Low at 427 FPS. The data shows that the performance drop from Medium to Ultra at 1440p is 109 FPS, which is a 28% reduction, but the resulting 279 FPS still offers a smooth experience on any display. For 1440p users, the Ultra preset is again recommended because the frame rate remains high enough to avoid any perceptible stutter, and the increased graphical detail is more noticeable at this resolution than at 1080p.

At 3840x2160, the situation changes significantly. The Ultra preset drops to 158 FPS average, while High manages 194 FPS, Medium hits 220 FPS, and Low reaches 241 FPS. The gap between Low and Ultra at 4K is 83 FPS, representing a 34% performance reduction. For 4K displays, the High preset is the best compromise because it delivers 194 FPS, which is still above the 144Hz threshold for most high-end monitors, while providing significantly better visual quality than Low or Medium. The Ultra preset at 4K, while playable at 158 FPS, may cause noticeable frame pacing issues on 160Hz or 165Hz displays, making High the safer choice for a locked frame rate experience.

GPU Role

The NVIDIA GeForce RTX 4080 SUPER is the dominant component in this pairing, and its specifications explain why Roblox runs at such extreme frame rates. The GPU features 16 GB of GDDR6X memory on a 256-bit bus, providing a bandwidth of 736.3 GB/s, which is more than sufficient for Roblox's relatively simple textures and geometry. The 10240 shading units and 80 RT cores, running at a boost clock of 2550 MHz, deliver a theoretical FP32 performance of 52.22 TFLOPS, which is grossly overprovisioned for a game that primarily relies on simple shaders and physics calculations.

The data shows that the GPU's performance ceiling is rarely reached in Roblox, except at 4K with Ultra settings. At 1080p, the average FPS ranges from 417 (Ultra) to 640 (Low), but the bottleneck is clearly the CPU, as evidenced by the relatively small frame rate differences between settings. At 4K, the GPU starts to become more relevant, with the Ultra preset dropping to 158 FPS compared to 241 FPS on Low, indicating that the additional pixel count is starting to tax the GPU's fill rate and memory bandwidth. The 736.3 GB/s bandwidth and 285.6 GPixel/s pixel rate are the key specifications that allow the RTX 4080 SUPER to maintain playable frame rates at 4K, even with the demanding Ultra preset.

The GPU's memory capacity of 16 GB is never a limiting factor in Roblox, as the game's texture sizes and asset streaming requirements are modest compared to modern AAA titles. The measured data supports this conclusion: the performance drop from Low to Ultra at any resolution is primarily due to increased shading and post-processing effects, not memory pressure. The GPU's 52.22 TFLOPS of compute power is also largely idle in Roblox, as the game does not utilize ray tracing or advanced compute-based effects to any significant degree.

CPU Role

The Intel Core i5-11400F is a 6-core, 12-thread processor based on the Rocket Lake architecture, with a base clock of 2.60 GHz and a boost clock of 4.40 GHz. Its 12 MB of shared L3 cache and dual-channel DDR4 memory support are adequate for Roblox's CPU demands, which are primarily single-threaded due to the game's physics and scripting engine. The benchmark data for this CPU shows a single-thread score of 868 in 3DMark and 2981 in Passmark, placing it in the 71st percentile of all CPUs, which indicates solid but not exceptional single-thread performance.

The measured FPS data reveals that the CPU is the primary bottleneck at 1080p and 1440p resolutions. At 1080p, the frame rates range from 417 to 640 FPS, but the differences between Low and Ultra settings are relatively small (640 FPS vs. 417 FPS), suggesting that the CPU is limiting the frame rate regardless of GPU load. The same pattern is visible at 1440p, where Low achieves 427 FPS and Ultra drops to 279 FPS, but the absolute numbers remain high enough to indicate CPU-bound behavior. At 4K, the GPU becomes more of a limiting factor, as evidenced by the larger performance gap between Low (241 FPS) and Ultra (158 FPS), but the CPU still contributes to the overall frame time.

The CPU's multi-threaded performance, as measured by a Cinebench R23 multicore score of 14340, is more than sufficient for Roblox, which typically uses only a few threads for game logic and rendering. The 4.40 GHz boost clock is the key specification for Roblox's single-threaded workloads, as the game's performance scales almost linearly with clock speed. The data shows that the i5-11400F's single-thread performance is the limiting factor at lower resolutions, where the GPU is capable of rendering far more frames than the CPU can feed it.

How This Combo Ranks

According to the comboRankInGame data, this specific pairing of the Intel Core i5-11400F and NVIDIA GeForce RTX 4080 SUPER ranks 323rd out of 3711 tested combinations in Roblox. This places it in the top 8.7% of all tested configurations, which is impressive given the CPU's mid-range positioning. The high rank is primarily due to the GPU's exceptional performance, as the RTX 4080 SUPER sits in the 86th percentile of all GPUs, while the CPU is only in the 71st percentile of all CPUs.

The nearest rival GPUs to the RTX 4080 SUPER, based on average benchmark scores, include the NVIDIA GeForce RTX 4080 with a delta of -0.1%, the AMD Radeon Pro W5700X at -1.1%, and the AMD Radeon RX 6750 GRE 12 GB at -2.7%. This indicates that the RTX 4080 SUPER is essentially on par with the non-SUPER RTX 4080 in raw compute, but the measured Roblox frame rates show that the CPU pairing is what determines the final experience. For the CPU, the nearest rivals are the AMD EPYC 7H12 (delta +0.3%), Intel Core i5-12450H (delta -0.4%), and AMD Ryzen 3 PRO 8300G (delta -0.6%), all of which have similar average benchmark scores but different core configurations.

The rank of 323 out of 3711 suggests that there are many combinations that achieve higher frame rates in Roblox, likely those with faster CPUs such as the Core i9 or Ryzen 9 series. However, the measured data shows that the i5-11400F is not a significant bottleneck at 4K, where the GPU is the limiting factor, and the 323rd rank reflects the CPU's limitations at lower resolutions rather than any GPU deficiency.

Resolution Scaling

The measured FPS data shows a clear pattern of diminishing returns as resolution increases, which is typical for a CPU-bound game like Roblox. At 1080p, the average FPS across all settings is 538 FPS (calculated from the four presets), while at 1440p it drops to 359 FPS, and at 4K it falls to 203 FPS. The drop from 1080p to 1440p is a 33% reduction, while the drop from 1440p to 4K is a 43% reduction, indicating that the GPU becomes increasingly relevant at higher resolutions.

When analyzing the resolution scaling by preset, the Low setting shows the smallest relative drop, from 640 FPS at 1080p to 427 FPS at 1440p (33% drop) and then to 241 FPS at 4K (44% drop from 1440p). The Ultra setting shows a similar pattern, with 417 FPS at 1080p, 279 FPS at 1440p (33% drop), and 158 FPS at 4K (43% drop). The consistency of these percentage drops across settings suggests that the scaling is primarily resolution-driven rather than settings-driven, which points to the GPU becoming the limiting factor at 4K.

The data implies that at 1080p and 1440p, the CPU is the bottleneck, as the frame rates do not increase proportionally when settings are lowered. For example, at 1080p, lowering from Ultra to Low only increases FPS by 53% (417 to 640), whereas the GPU load difference between those presets is likely much larger. At 4K, the GPU's fill rate and bandwidth constraints become more apparent, as the Ultra preset's 158 FPS is significantly lower than the Low preset's 241 FPS, indicating that the GPU is now the primary limiter.

Measured FPS Breakdown

At 1920x1080, the measured average FPS is 640 on Low settings, 582 on Medium, 515 on High, and 417 on Ultra. The Medium preset shows a minimum of 495 FPS and a maximum of 669 FPS, which represents a 35% variance between the average and the minimum, suggesting some frame time inconsistency during complex scenes. The Low preset does not have recorded min/max values, but the average of 640 FPS is the highest of any resolution and setting combination in the data.

At 2560x1440, the average FPS is 427 on Low, 388 on Medium, 343 on High, and 279 on Ultra. The Medium preset's min/max values are 330 FPS and 447 FPS, respectively, showing a tighter variance of 15% between the average and minimum compared to 1080p. The Ultra preset at 1440p delivers 279 FPS, which is only 61 FPS higher than the 4K Ultra result, indicating that the GPU is starting to become more of a factor at this resolution.

At 3840x2160, the average FPS is 241 on Low, 220 on Medium, 194 on High, and 158 on Ultra. The Medium preset's min/max values are 187 FPS and 253 FPS, respectively, representing a 15% variance from the average, which is similar to the 1440p variance. The Ultra preset at 4K produces the lowest average FPS in the entire dataset at 158 FPS, but this is still above the 144Hz threshold for most gaming monitors, making it a viable option for high-refresh-rate 4K displays.

FAQ

Q: What is the best settings preset for a 144Hz 1080p monitor?

A: The Ultra preset at 1920x1080 delivers an average of 417 FPS, which is well above the 144Hz refresh rate. Even the High preset at 515 FPS is far beyond what the monitor can display, so the Ultra preset is recommended for maximum visual quality without any performance concerns.

Q: Does the RTX 4080 SUPER's 16 GB of VRAM ever become a bottleneck in Roblox?

A: No, the measured data shows no evidence of VRAM-related performance drops. The game's texture requirements are modest, and the 736.3 GB/s bandwidth is more than sufficient for all tested settings and resolutions, as evidenced by the consistent frame rates across different presets.

Q: Why is the frame rate so high at 1080p but drops significantly at 4K?

A: At 1080p, the CPU's single-thread performance (boost clock of 4.40 GHz) is the limiting factor, as the GPU can render frames faster than the CPU can process game logic. At 4K, the GPU's fill rate and pixel rate (285.6 GPixel/s) become the bottleneck, causing the average FPS to drop from 538 FPS at 1080p to 203 FPS at 4K across all settings.

Q: How does this combination rank compared to other tested systems?

A: The combo rank is 323 out of 3711 tested combinations, placing it in the top 8.7% of all configurations. This high ranking is largely due to the RTX 4080 SUPER's 86th percentile performance among GPUs, despite the i5-11400F only reaching the 71st percentile among CPUs.

Q: Is the Ultra preset playable at 4K?

A: Yes, the Ultra preset at 3840x2160 averages 158 FPS, which is still above the 144Hz refresh rate. However, the High preset at 194 FPS provides a more comfortable margin above 144Hz and is recommended for users with 160Hz or 165Hz displays to avoid frame pacing issues.

Q: What is the frame time variance like on the Medium preset?

A: At 1080p Medium, the minimum FPS is 495 compared to the 582 average, representing a 15% drop. At 1440p Medium, the minimum is 330 FPS versus 388 average, also a 15% drop. At 4K Medium, the minimum is 187 FPS versus 220 average, maintaining the same 15% variance, indicating consistent frame pacing across resolutions.