Roblox

# How This Combo Ranks

The Intel Core i5-9400 paired with the NVIDIA GeForce RTX 5070 lands at rank 385 out of 1800 tested combos in Roblox, placing it in the top 21.4% of all system configurations. This is a strong showing for a combination that pairs a six-core CPU from 2018 with a current-generation Blackwell GPU.

The ranking reflects a system that is overwhelmingly GPU-limited at higher resolutions but becomes increasingly CPU-bound as resolution drops. The RTX 5070 sits at the 83rd percentile among all GPUs, while the i5-9400 sits at the 50th percentile among all CPUs. That gap matters: the processor is an average performer, yet the combo still cracks the top 400 because Roblox scales well with raw GPU throughput.

Benchmark data shows the RTX 5070 averaging 41,687 across all tests, with nearest rivals including the AMD Radeon Pro 5300 (0.2% higher), the NVIDIA Tesla M40 (0.5% lower), and the NVIDIA GeForce RTX 3090 (0.6% lower). The i5-9400's average benchmark score of 2,305 places it within 0.6% of the Intel Core i7-8809G and within 0.4% of the Intel Xeon E-2134. These are tight margins, confirming that neither component is dramatically ahead or behind its direct competitors.

The 385th rank out of 1,800 combos suggests that while this configuration is not near the top, it is comfortably above the median. The data indicates that most of the performance ceiling in Roblox is set by the GPU, and the RTX 5070 is capable of delivering very high frame rates across all tested settings and resolutions.

FAQ

Q: How does this combo rank among all tested configurations in Roblox?

A: This combo ranks 385th out of 1,800 tested combos, placing it in the top 21.4% of all configurations tested in this game.

Q: What is the highest average FPS this combo achieves in Roblox?

A: The highest measured average FPS is 541.5, achieved at 1920x1080 resolution with Low settings.

Q: What is the lowest average FPS this combo achieves in Roblox?

A: The lowest measured average FPS is 135.6, recorded at 3840x2160 resolution with Ultra settings.

Q: How does the RTX 5070 compare to its nearest rival, the RTX 3090?

A: The RTX 5070's average benchmark score of 41,687 is 0.6% higher than the RTX 3090's score of 41,441, indicating near-identical overall performance.

Q: How does the i5-9400 compare to the Intel Core i3-10305?

A: The i5-9400's average benchmark score of 2,305 is 0.2% higher than the Core i3-10305's score of 2,300, making them effectively equivalent in CPU performance.

Q: Does the GPU or CPU limit performance more in this combo?

A: The data shows the GPU has far more headroom than the CPU. The RTX 5070 is at the 83rd GPU percentile while the i5-9400 is at the 50th CPU percentile, indicating the processor is the more likely bottleneck, especially at lower resolutions.

Resolution Scaling

The measured FPS data reveals a clear pattern of diminishing returns as resolution increases. At 1920x1080 with Low settings, the combo delivers 541.5 FPS. Moving to 2560x1440 at the same settings drops that to 363.2 FPS, a reduction of 178.3 FPS. At 3840x2160, the frame rate falls further to 205.2 FPS.

The scaling from 1080p to 1440p shows a 32.9% performance drop with Low settings. From 1440p to 4K, the drop is 43.5%. This nonlinear decline indicates that the GPU is becoming the limiting factor at higher resolutions. At 1080p, the frame rates are so high that the CPU's six cores and six threads likely cannot feed the GPU fast enough to reach its full potential.

The gap between Low and Ultra settings widens with resolution. At 1080p, the difference between Low (541.5 FPS) and Ultra (356.8 FPS) is 184.7 FPS. At 1440p, the gap is 126.2 FPS. At 4K, the gap narrows to 69.6 FPS. This compression at higher resolutions is typical of GPU-bound scenarios, where the rendering workload dominates and settings differences have less proportional impact.

The data suggests that at 1080p, the i5-9400 with its 2.90 GHz base clock and 4.10 GHz boost clock is the primary constraint. At 4K, the RTX 5070's 30.87 TFLOPS FP32 throughput and 672.0 GB/s memory bandwidth become the dominant factors.

Measured FPS Breakdown

At 1920x1080, the combo delivers its highest frame rates. With Low settings, the average is 541.5 FPS. Medium settings yield 490.6 FPS, High settings produce 433.5 FPS, and Ultra settings drop to 356.8 FPS. The spread between Low and Ultra at this resolution is 184.7 FPS, showing that settings have a substantial impact when the CPU is not the sole bottleneck.

Moving to 2560x1440, frame rates remain high but show the expected decline. Low settings average 363.2 FPS, Medium settings hit 330.1 FPS, High settings reach 289.3 FPS, and Ultra settings fall to 237 FPS. The gap between Low and Ultra narrows to 126.2 FPS. All four settings remain well above 200 FPS, indicating that 1440p is still comfortably within the GPU's capability.

At 3840x2160, the performance drops become more pronounced. Low settings deliver 205.2 FPS, Medium settings achieve 189 FPS, High settings produce 164.2 FPS, and Ultra settings bottom out at 135.6 FPS. Even at 4K Ultra, the combo maintains a playable frame rate above 135 FPS, which is notable given the demanding resolution.

Across all resolutions, the ordering is consistent: Low > Medium > High > Ultra. The relative performance deltas are also consistent, with Medium averaging roughly 9-10% below Low, High averaging roughly 20% below Low, and Ultra averaging roughly 34-40% below Low depending on resolution.

CPU Role

The Intel Core i5-9400 is a six-core, six-thread processor based on the Coffee Lake architecture. It has a base clock of 2.90 GHz and a boost clock of 4.10 GHz, with 9 MB of shared L3 cache. This is a mainstream desktop processor from 2018, now end-of-life, but it remains relevant in this combo.

In Roblox, the CPU's role appears to be significant at lower resolutions. The jump from 433.5 FPS at 1080p High to 289.3 FPS at 1440p High is a 33.3% reduction, which is smaller than the resolution's pixel count increase (2.25x). This suggests that at 1080p, the CPU is limiting the frame rate, preventing the GPU from fully stretching its legs.

The i5-9400's benchmark scores support this interpretation. Its Cinebench R23 multi-core score is 7,969, and its single-core score is 1,125. These are modest numbers for a modern gaming CPU, but Roblox is not an exceptionally CPU-heavy title. The processor's 50th percentile ranking among all CPUs indicates it is average, yet it still enables frame rates above 500 FPS at 1080p Low.

At 4K, the CPU's influence diminishes. The difference between 1080p Low (541.5 FPS) and 4K Low (205.2 FPS) is primarily attributable to the GPU's rendering workload. The RTX 5070's 192-bit memory bus and 12 GB of GDDR7 memory are the key factors at this resolution.

The six cores without hyper-threading mean that heavily threaded scenes could cause frame dips, but the measured data shows no minimum FPS figures, only averages. The 65W TDP and 14nm process node indicate this is an efficient, older-generation chip that pairs reasonably well with a 250W GPU. The PCIe Gen 3 interface with 16 lanes provides sufficient bandwidth for most gaming workloads, though the RTX 5070 supports PCIe 5.0. This generational mismatch in bus interface could theoretically limit data transfer, but the measured FPS numbers suggest any such impact is minimal in Roblox.