Roblox

The Intel Core i5-9400 paired with the AMD Radeon RX 9070 XT delivers an exceptionally strong performance profile in Roblox, with the data showing a clear trend where the GPU dominates the workload across all tested configurations. This combination ranks 512th out of 1,800 tested combos in this game, placing it in the upper third of all systems benchmarked, which is a notable achievement given the CPU’s age relative to the GPU. The Core i5-9400 is a six-core, six-thread processor from the Coffee Lake architecture, running at a base clock of 2.90 GHz and a boost clock of 4.10 GHz, with 9 MB of shared L3 cache. Its single-core performance, as measured by a Cinebench R23 score of 1,125, is modest by modern standards, yet the benchmark results indicate that Roblox does not heavily stress the CPU, as the frame rates achieved are consistently high even at lower resolutions where CPU overhead typically becomes more apparent.

CPU Role — cores, clocks, and how they relate to this game's results

The Core i5-9400’s six physical cores without hyper-threading are sufficient for Roblox’s workload, as the game’s engine does not appear to scale with high thread counts. The processor’s Cinebench R23 multi-core score of 7,969 and single-core score of 1,125 place it at the 50th percentile of all CPUs tested, with its nearest rivals being the Intel Core i3-10305 (0.2% higher average score) and the Intel Core i3-1125G4 (0.2% higher), while the Intel Xeon E-2134 is 0.4% ahead and the Intel Core i7-8809G is 0.6% behind. These margins are negligible, indicating that the i5-9400’s computational power is essentially on par with these alternatives in synthetic tests, but the measured FPS data suggests that the CPU is rarely the limiting factor in Roblox. At 1080p with Low settings, the combo achieves 502.2 FPS, which is a clear indication that the processor can feed the GPU at high rates even with reduced graphical load, and the fact that this score drops only modestly to 403.5 FPS at High settings further reinforces that the CPU is not a bottleneck in this scenario. The 6-thread design, combined with a 65W TDP, keeps thermals manageable, allowing the boost clock of 4.10 GHz to sustain performance without throttling, which is critical for maintaining high frame rates in a game that is often bound by single-thread responsiveness.

GPU Role — VRAM, clocks, and how they relate to this game's results

The AMD Radeon RX 9070 XT is the clear performance driver in this pairing, and its specifications explain why the frame rates scale so aggressively with resolution and settings. The GPU features 16 GB of GDDR6 memory on a 256-bit bus, providing a bandwidth of 644.6 GB/s, which is more than sufficient for Roblox’s relatively modest texture and geometry demands at any resolution. Its boost clock of 2970 MHz and game clock of 2400 MHz, combined with 4096 shading units, deliver a pixel rate of 380.2 GPixel/s and a texture rate of 760.3 GTexel/s, which translate directly into the high fill rates needed for the game’s blocky but numerous draw calls. The GPU’s 82nd percentile ranking among all GPUs, with an average benchmark score of 39,647, places it far above the CPU’s relative standing, and its nearest rivals—the AMD Radeon Pro 575 (-0.1%), NVIDIA RTX A500 Mobile (0.2%), and AMD Radeon Pro 575X (-0.5%)—are all within a fraction of a percent, but the RX 9070 XT’s real-world advantage is evident in the measured FPS. At 4K Ultra, the combo still manages 121.9 FPS, which shows that even at the highest settings the GPU has ample headroom, and the 16 GB VRAM capacity ensures that no memory-related stutters occur, as Roblox rarely exceeds a few gigabytes of video memory usage. The GPU’s 304W TDP and dual-slot design are typical for a high-end card, and its PCIe 5.0 x16 interface provides more than enough bandwidth for the game’s data transfer needs.

FAQ

Q: How does the Intel Core i5-9400 compare to its nearest rival, the Intel Core i3-10305, in terms of synthetic benchmark scores?

A: The Core i5-9400 has an average benchmark score of 2,305, which is 0.2% lower than the Core i3-10305’s average score of 2,300, a difference that is effectively negligible in real-world performance.

Q: What is the GPU’s percentile ranking and what does it indicate about its overall performance?

A: The AMD Radeon RX 9070 XT sits at the 82nd percentile of all GPUs tested, meaning it outperforms 82% of GPUs in the database, which is consistent with its high measured FPS in Roblox.

Q: What is the highest average FPS achieved by this combo in the measured data?

A: The highest average FPS is 502.2, achieved at 1920x1080 resolution with Low settings, indicating that the CPU and GPU combination can push extremely high frame rates when graphical load is minimized.

Q: How much does the average FPS drop from 1080p Ultra to 4K Ultra?

A: The average FPS drops from 328.2 at 1080p Ultra to 121.9 at 4K Ultra, representing a reduction of 206.3 FPS or roughly 63% of the 1080p performance.

Q: Is the Core i5-9400 a bottleneck for the RX 9070 XT in Roblox?

A: Based on the measured data, the CPU is not a significant bottleneck, as the combo achieves 403.5 FPS at 1080p High and 269.6 FPS at 1440p High, which are high enough to indicate that the GPU is still the primary performance driver.

Q: What is the combo’s rank in the game and how many total combos are tested?

A: The combo ranks 512th out of 1,800 tested combos in Roblox, placing it in the top 28% of all systems benchmarked for this game.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

The measured FPS data reveals a consistent pattern across all resolutions: higher settings reduce frame rates, but the absolute numbers remain high enough for smooth gameplay even at 4K. At 1920x1080, the combo delivers 502.2 FPS on Low, 457.2 FPS on Medium, 403.5 FPS on High, and 328.2 FPS on Ultra. These figures show a linear decline of roughly 50-75 FPS per settings tier, which is typical for a game that scales primarily with GPU load. Moving to 2560x1440, the frame rates drop to 334.4 FPS on Low, 303.8 FPS on Medium, 269.6 FPS on High, and 215.3 FPS on Ultra, representing a reduction of about 33-35% compared to 1080p at each settings level. At 3840x2160, the performance is still impressive, with 190.3 FPS on Low, 169.4 FPS on Medium, 152.9 FPS on High, and 121.9 FPS on Ultra. The gap between Low and Ultra widens as resolution increases: at 1080p, Ultra is 34.7% slower than Low, while at 4K, Ultra is 36.0% slower, indicating that the GPU’s memory bandwidth and pixel throughput are the limiting factors at higher resolutions, rather than the CPU. The lowest measured FPS is 121.9 at 4K Ultra, which still exceeds the refresh rate of most standard monitors, making this combo capable of driving high-refresh displays at any settings combination.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The resolution scaling data clearly identifies the GPU as the primary limiting component, as the FPS drop from 1080p to 4K is substantial but not catastrophic, which is expected when moving from a 2.07 million pixel count to an 8.29 million pixel count. At Low settings, the frame rate falls from 502.2 FPS at 1080p to 334.4 FPS at 1440p and 190.3 FPS at 4K, representing a 62.1% reduction from 1080p to 4K. At Ultra settings, the drop is from 328.2 FPS at 1080p to 215.3 FPS at 1440p and 121.9 FPS at 4K, a 62.9% reduction. The consistency of this percentage across settings suggests that the GPU’s rasterization and pixel processing capabilities are the bottleneck, as the CPU’s workload remains relatively constant regardless of resolution. The fact that the combo still achieves over 120 FPS at 4K Ultra indicates that the RX 9070 XT has substantial headroom, and the 16 GB VRAM ensures that texture loading does not cause frame dips at higher resolutions. The scaling behavior also shows that the Core i5-9400 is not limiting performance, as the FPS at 1080p Low (502.2) is far above what a CPU-bound scenario would produce, given that the processor’s single-core score is only at the 50th percentile.

Settings Recommendations — which preset gives the best experience per the measured rows

For users targeting the highest possible frame rates, the Low preset at 1080p delivers 502.2 FPS, which is ideal for competitive play on high-refresh monitors, but the visual quality degradation may not be worth the extra 100 FPS over Medium. The Medium preset at 1080p offers 457.2 FPS, a 9% reduction from Low, which is a reasonable trade-off for improved graphics. However, the data suggests that the High preset at 1080p, at 403.5 FPS, provides the best balance for most users, as it delivers frame rates well above the 240Hz threshold while still maintaining good visual fidelity. At 1440p, the High preset at 269.6 FPS is the sweet spot for high-refresh 1440p monitors, as it offers a 25% improvement over Ultra’s 215.3 FPS with only a minor visual penalty. For 4K displays, the Medium preset at 169.4 FPS is recommended, as it provides a 39% improvement over Ultra’s 121.9 FPS, and the difference between Medium and High (152.9 FPS) is less pronounced, making Medium the more efficient choice. The Ultra preset should be avoided unless users prioritize maximum graphics over frame rate, as the performance drop from High is consistently around 20-30% across all resolutions.

How This Combo Ranks — use comboRankInGame vs other tested combos

The Intel Core i5-9400 and AMD Radeon RX 9070 XT combination ranks 512th out of 1,800 tested combos in Roblox, placing it in the 71.6th percentile of all systems benchmarked. This rank is notably higher than the CPU’s individual 50th percentile ranking, which indicates that the GPU’s strong performance is the primary driver of the combo’s success. The rank of 512 means that 1,288 other combos perform worse in this game, which is a significant achievement given that the CPU is a 2018-era processor. The gap between the CPU’s modest synthetic scores and the combo’s high in-game rank suggests that Roblox is not a CPU-intensive title, and users with this setup can expect performance that rivals much more modern CPU-GPU pairings. The fact that this combo achieves over 120 FPS at 4K Ultra and over 400 FPS at 1080p High places it in the top tier of systems for this game, and the rank of 512 out of 1,800 confirms that the RX 9070 XT is capable of compensating for the i5-9400’s limitations in this specific title.