Roblox

Roblox with an Intel Core i5-9400 and an NVIDIA GeForce RTX 5090 D is an extreme pairing that produces some of the highest frame rates recorded for this game. The data places this combination at rank 153 out of 3010 tested combos, placing it in the top 5.1% of all configurations evaluated. This ranking is a direct result of the RTX 5090 D's immense processing power, which is not fully constrained by the older six-core processor at most settings. The benchmark results show a system capable of delivering hundreds of frames per second, making it far more than sufficient for the game's typical demands, regardless of the resolution chosen.

How This Combo Ranks

The combo's rank of 153 out of 3010 tested configurations is a strong indicator of its overall performance ceiling. This position places it comfortably within the top percentile of all systems tested for this title, reflecting a hardware pairing that is heavily weighted toward GPU capability. The ranking suggests that while the Intel Core i5-9400 is a mid-range processor from a previous generation, its performance is sufficient to allow the RTX 5090 D to operate at a level that outperforms the vast majority of other combinations. The data shows that the bottleneck in this system is not the CPU, but rather the game's own engine limits or the GPU's ability to render frames as fast as the rest of the system allows.

The delta between this combo's rank and the top spot is not shown, but being in the top 5% indicates that only a small number of configurations, likely featuring newer, higher-end CPUs, can push higher frame rates. The i5-9400 holds a 47th percentile ranking among all CPUs, which is modest, but its 6 cores and 6 threads are enough to feed the GPU in Roblox. The benchmark data suggests that the GPU's 92nd percentile ranking among all GPUs is the primary driver of this combo's high placement. The system's performance is a clear case of a powerful GPU improving a mid-range CPU to elite status in a game that is not particularly CPU-intensive.

GPU Role

The NVIDIA GeForce RTX 5090 D is the undisputed star of this configuration. Its specifications are overwhelming, featuring 32 GB of GDDR7 memory on a 512-bit bus, providing a massive 1.79 TB/s of memory bandwidth. The GPU is built on the Blackwell 2.0 architecture and contains 21,760 shading units, 680 texture mapping units, and 176 render output units. These specifications are reflected in its benchmark scores, which show a 3DMark Steel Nomad DX12 score of 14,326 and a Passmark G3D score of 44,065. This hardware is designed for extreme workloads, and Roblox is not one of them.

The GPU's clock speeds are also a factor, with a base clock of 2017 MHz and a boost clock of 2407 MHz. The data shows that the GPU is rarely the limiting factor in this game. At 1080p Low settings, the frame rate reaches 554 FPS, which is likely close to the game's engine limit or the CPU's maximum output. The GPU's role here is to ensure that no matter how complex the Roblox world becomes, the rendering pipeline is never starved for resources. The 32 GB of VRAM is vast overkill for Roblox, meaning there is zero risk of memory capacity being a bottleneck, even with the most elaborate user-created content or high-resolution texture packs. The GPU's performance is so far beyond the game's requirements that it effectively removes graphical limitations from the equation.

Resolution Scaling

The frame rate scaling across resolutions reveals a clear picture of where the bottleneck lies. When moving from 1080p to 1440p, the average frame rate at High settings drops from 514 FPS to 417 FPS, a decrease of 97 FPS. This is a significant drop, but the absolute numbers are still extremely high. However, the scaling is not linear, and the drop from 1440p to 4K is more pronounced. At High settings, the 4K average is 236 FPS, which is 181 FPS lower than the 1080p result. This shows that as resolution increases, the GPU is being tasked with more work, which is expected.

This scaling pattern indicates that at 1080p, the system is heavily CPU-bound or engine-limited. The frame rate of 554 FPS at Low settings and 514 FPS at High settings suggests that the CPU cannot push frames much faster than this, regardless of the graphical load. As the resolution increases to 1440p and then to 4K, the GPU's workload increases proportionally, and the frame rate begins to drop, indicating a shift toward a GPU-bound scenario. At 4K Ultra, the frame rate falls to 191 FPS, which is still an excellent result but shows that the GPU is now the primary factor determining performance. The data suggests that the sweet spot for this combo is any resolution, as it never dips below a level that would be considered anything less than exceptionally smooth.

Measured FPS Breakdown

The measured FPS data provides a detailed look at the system's performance across different settings and resolutions. At 1920x1080, the system produces an average of 554 FPS on Low settings, 536 FPS on Medium, 514 FPS on High, and 477 FPS on Ultra. The Medium settings row includes a minimum of 456 FPS and a maximum of 617 FPS, showing some variance but no concerning dips. The difference between Low and Ultra at 1080p is only 77 FPS, which is a relatively small range, further confirming that the CPU is the limiting factor at this resolution.

At 2560x1440, the frame rates are still remarkably high. The Low preset yields 484 FPS, Medium produces 469 FPS, High drops to 417 FPS, and Ultra sits at 338 FPS. The Medium preset at this resolution shows a minimum of 398 FPS and a maximum of 539 FPS. The performance is still so high that any of these settings would provide a flawless experience on a high-refresh-rate monitor. The gap between Low and Ultra has widened to 146 FPS, showing that the GPU is beginning to have a larger influence on performance.

At 3840x2160, the system finally shows signs of being GPU-bound. The Low preset still manages an impressive 293 FPS, but the Medium preset drops to 267 FPS, High to 236 FPS, and Ultra to 191 FPS. The Medium settings at 4K show a minimum of 227 FPS and a maximum of 307 FPS. Even at the most demanding setting of 4K Ultra, the system maintains an average of 191 FPS, which is far above the 60 FPS target and even exceeds the refresh rate of many high-end monitors. The data shows a consistent and predictable scaling pattern, with the system never producing a result below 190 FPS in any configuration.

FAQ

Q: What is the overall performance rank of this CPU and GPU combination in Roblox?

A: The combination ranks 153rd out of 3010 tested combos, placing it in the top 5.1% of all configurations tested for this game.

Q: How much faster is the system at 1080p compared to 4K on High settings?

A: At 1080p High, the average frame rate is 514 FPS, while at 4K High, it drops to 236 FPS. This represents a 278 FPS difference, showing a significant performance scaling with resolution.

Q: Is the CPU or the GPU the limiting factor at 1080p?

A: The data suggests the CPU is the limiting factor at 1080p. The frame rate difference between Low (554 FPS) and Ultra (477 FPS) is only 77 FPS, indicating that the GPU has enough headroom to render more frames but is held back by the processor.

Q: What is the minimum frame rate recorded in the benchmark data?

A: The lowest minimum FPS recorded is 227 FPS, which occurs at 4K resolution with Medium settings. The next lowest minimum is 398 FPS at 1440p Medium.

Q: How does the average score of the Intel Core i5-9400 compare to its closest rival?

A: The i5-9400 has an average benchmark score of 2254. Its closest rival, the Intel Core i7-1068NG7, has an average score of 2259, which is a delta of -0.2%.

Q: Does the GPU's performance ranking exceed that of the CPU?

A: Yes. The RTX 5090 D is in the 92nd percentile of all GPUs, while the i5-9400 is in the 47th percentile of all CPUs. This large discrepancy highlights the GPU's dominance in this pairing.

Settings Recommendations

The benchmark data suggests that users can prioritize visual fidelity without any practical performance concerns. At any resolution, the system delivers frame rates that are far beyond the refresh rate of standard monitors. For users with a 1080p or 1440p display, selecting the Ultra preset is the logical choice, as it provides the best visual quality while still maintaining average frame rates of 477 FPS and 338 FPS, respectively. These numbers are so high that the visual upgrade is essentially free.

For 4K users, the data shows that even the Ultra preset provides an average of 191 FPS, which is an exceptional result. However, for those who wish to maximize the potential of a very high-refresh-rate 4K display, the High preset offers a 45 FPS increase over Ultra, jumping to 236 FPS. The Medium preset at 4K provides a further increase to 267 FPS, with a minimum of 227 FPS, ensuring no frame rate drops below 200 FPS. Given the game's visual style, the difference between Medium and Ultra may not be as impactful as the raw frame rate boost, making Medium a strong recommendation for competitive or high-refresh-rate 4K play. The Low preset at 4K still produces 293 FPS, but the visual compromise is likely unnecessary given the system's power.

CPU Role

The Intel Core i5-9400 is a 6-core, 6-thread processor from the Coffee Lake architecture, with a base clock of 2.90 GHz and a boost clock of 4.10 GHz. It has 9 MB of shared L3 cache and supports dual-channel DDR4 memory. Its benchmark scores include a Cinebench R23 multi-core score of 6629 and a single-core score of 935. It holds a 47th percentile ranking among all CPUs, and its average benchmark score of 2254 puts it on par with the Intel Core i7-1068NG7, which scores 2259, and slightly ahead of the AMD Ryzen 5 PRO 1500, which scores 2246.

In the context of Roblox, the CPU's role is to manage game logic, physics, and draw calls. The data from the 1080p benchmarks indicates that this processor is the limiting factor at lower resolutions, as the frame rate plateaus around the 477-554 FPS range regardless of the graphical settings. The 6 cores and 6 threads are sufficient for Roblox's engine, but the single-thread performance, as shown by the Geekbench single-core score of 1389, is likely what caps the maximum frame rate. Despite this, the CPU's performance is more than adequate for a smooth experience, as even the "bottleneck" result of 477 FPS at 1080p Ultra is an excellent outcome. The processor's modest 65W TDP and end-of-life status do not detract from its ability to support the RTX 5090 D in this specific game, though a newer CPU would likely unlock even higher frame rates in less demanding scenes.