Roblox

FAQ

Q: What is the best measured average frame rate for this combo in Roblox?

A: The highest measured average is 552.6 FPS, achieved at 1920x1080 with Low settings. The same resolution at Medium produces 537 FPS, while Ultra drops to 418.3 FPS.

Q: How does the CPU's multi-core performance compare to its nearest rivals?

A: The Intel Core i5-9400 has an average benchmark score of 2305, which is 0.2% ahead of both the Intel Core i3-10305 (2300) and the Intel Core i3-1125G4 (2299), and 0.4% ahead of the Intel Xeon E-2134 (2295). It trails the Intel Core i7-8809G (2319) by 0.6%.

Q: What is the GPU's DirectX 12 performance relative to its closest competitor?

A: The NVIDIA GeForce RTX 4080 SUPER scores 134 in the Passmark DirectX 12 test. Its overall average benchmark score of 53610 puts it 0.2% ahead of the AMD Radeon RX 6900 XT (53489) and 0.4% ahead of the AMD Radeon Pro W6600M (53414).

Q: Does the RTX 4080 SUPER support modern graphics APIs?

A: Yes, the GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This ensures compatibility with Roblox's rendering requirements across different settings.

Q: What is the frame rate difference between 4K Ultra and 4K Low?

A: At 3840x2160, Ultra settings produce 159.4 FPS average, while Low settings reach 242.5 FPS. That is a 83.1 FPS gap, or roughly 52% higher frame rate on Low compared to Ultra at 4K.

Q: How does the combo rank among all tested configurations for Roblox?

A: This specific CPU-GPU pairing ranks 156th out of 1800 tested combos in Roblox, placing it in the top 8.7% of all configurations evaluated.

Settings Recommendations

The measured data clearly shows that Roblox scales significantly with resolution and preset selection. At 1920x1080, the difference between Low (552.6 FPS) and Ultra (418.3 FPS) is substantial, but even Ultra maintains a frame rate well above what most displays can refresh. The 1080p Medium preset at 537 FPS offers a balanced approach, delivering only 15.6 FPS less than Low while providing improved visual quality.

For 2560x1440 users, High settings at 342.5 FPS present the strongest combination of visual fidelity and performance headroom. The jump from Medium (387.6 FPS) to High costs only 45.1 FPS, yet the visual upgrade is noticeable. Ultra at 279.8 FPS remains playable but begins to approach the threshold where frame time consistency could matter on high-refresh monitors.

At 3840x2160, High settings at 193.8 FPS deliver the best experience relative to the quality-to-performance trade-off. Medium (218.7 FPS) offers only 24.9 FPS more than High, while Low (242.5 FPS) sacrifices significant visual detail for a 48.7 FPS gain over High. Ultra at 159.4 FPS is the only measured preset that drops below 160 FPS, making it the least desirable option for competitive or fast-paced gameplay.

The data suggests that High settings provide the most consistent experience across all three resolutions, with frame rates ranging from 193.8 FPS at 4K to 515.7 FPS at 1080p. Players prioritizing maximum smoothness should select Low at their native resolution, but the performance overhead is so large that Medium or High will typically be the better choice.

GPU Role

The NVIDIA GeForce RTX 4080 SUPER is built on the Ada Lovelace architecture using TSMC's 5 nm process, housing 45,900 million transistors on a 379 mm² die. Its 16 GB of GDDR6X memory operates across a 256-bit bus, delivering 736.3 GB/s of bandwidth. The GPU's boost clock reaches 2550 MHz, with a base clock of 2295 MHz.

In Roblox, the GPU's raw compute power translates into exceptional frame rates. The card's 52.22 TFLOPS of FP32 performance and 816.0 GTexel/s texture rate allow it to handle Roblox's blocky geometry with ease, even at 4K resolution. The 80 RT cores and 320 tensor cores provide headroom for any future rendering enhancements, though Roblox's current visual style does not heavily stress ray tracing.

The GPU's memory configuration is particularly relevant at higher resolutions. At 3840x2160, the 16 GB frame buffer ensures that texture streaming and draw calls never become a bottleneck, as evidenced by the 193.8 FPS average on High settings. The 736.3 GB/s bandwidth supports rapid asset loading in user-generated worlds, where content variety can be extreme.

The 88th percentile ranking among all GPUs places this card firmly in the high-end segment. Its average benchmark score of 53610 is 2.1% ahead of the AMD Radeon RX 7700S and 2.9% ahead of the NVIDIA GeForce RTX 5070 Ti. In Roblox specifically, the GPU's capabilities are far beyond what the game typically demands, resulting in CPU-limited scenarios at lower resolutions — the 552.6 FPS at 1080p Low suggests the graphics processor is not the constraining factor.

How This Combo Ranks

This Intel Core i5-9400 + RTX 4080 SUPER combination ranks 156th out of 1800 tested combos in Roblox. This places the pairing in the top 8.7% of all configurations evaluated, indicating strong overall suitability for the game.

The ranking reflects a significant imbalance between the CPU and GPU. The RTX 4080 SUPER sits at the 88th percentile among all GPUs, while the i5-9400 rests at the 50th percentile among all CPUs. In a game like Roblox, which tends to be more CPU-sensitive due to its physics simulation and scripting, this gap matters. At lower resolutions, the CPU's 6 cores and 6 threads become the limiting factor, preventing the GPU from reaching its full potential.

The measured frame rates support this interpretation. At 1920x1080, increasing settings from Low to Ultra only reduces frame rate from 552.6 to 418.3 FPS — a 24.3% drop. In contrast, at 3840x2160, the same settings change reduces frame rate from 242.5 to 159.4 FPS, a 34.3% drop. This indicates that the GPU becomes more relevant at higher resolutions, where its strengths can be utilized.

The combo's rank of 156 out of 1800 suggests that many other pairings achieve better Roblox performance, likely those with stronger CPUs paired with mid-range GPUs. However, the absolute frame rates are so high that the rank difference may not translate into perceptible gameplay advantages beyond a certain point.

CPU Role

The Intel Core i5-9400 is a 6-core, 6-thread processor based on the Coffee Lake architecture, manufactured on Intel's 14 nm process. It runs at a base clock of 2.90 GHz with a boost clock of 4.10 GHz, and includes 9 MB of shared L3 cache. The CPU's dual-channel DDR4 memory support provides 42.7 GB/s of bandwidth.

In Roblox, the CPU's role is critical because the game's physics, scripting, and world simulation run primarily on the processor. The i5-9400's single-core performance, measured at 1125 in Cinebench R23, determines how quickly individual game logic threads execute. The multi-core score of 7969 in the same test indicates that the 6 physical cores can handle parallel workloads, but the lack of hyper-threading means only 6 threads are available.

The CPU's 50th percentile ranking among all CPUs places it at the median, which is modest compared to the GPU's 88th percentile. This disparity explains why the combo's Roblox ranking (156th of 1800) is not higher. At 1080p, the CPU becomes the bottleneck, as evidenced by the relatively small frame rate differences between settings — Low (552.6 FPS) to Ultra (418.3 FPS) represents only a 134.3 FPS spread, suggesting the CPU limits overall throughput.

The nearest rivals in CPU performance are tightly clustered. The i5-9400's average benchmark score of 2305 is within 0.6% of all four nearest competitors, indicating that CPU choice in this performance class has minimal impact on Roblox frame rates. The 0.2% advantage over the i3-10305 and i3-1125G4, and the 0.4% edge over the Xeon E-2134, are statistically negligible in real-world gaming.

For Roblox specifically, the CPU's 6 threads may be insufficient for heavily populated servers where many player scripts run simultaneously. The boost clock of 4.10 GHz helps with single-threaded performance, but users seeking higher frame rates in complex user-generated worlds may find the CPU limiting, especially at 1080p where the GPU has ample headroom.