Roblox

Roblox is not a typical GPU stress test, and this combo proves it. With an Intel Core i5-10400F paired with an NVIDIA GeForce RTX 5070 Ti, the measured frame rates are extraordinarily high across all settings, but the data reveals a clear bottleneck that shifts depending on where you look. This combination ranks 187th out of 1800 tested combos for this game, placing it in the top 10.4% of all configurations tested. That ranking is impressive, but the real story is how the CPU limits the GPU’s potential at lower resolutions, while the GPU takes over as the primary constraint at 4K.

How This Combo Ranks

The 187th place ranking out of 1800 combos is a strong result, but it does not tell the whole story. The data shows that this system is capable of frame rates that far exceed the refresh rates of most displays. At 1080p, the average FPS ranges from 403.5 on Ultra to 583.9 on Low. These numbers are so high that the ranking is likely determined more by the CPU’s ability to feed the GPU than by the GPU’s raw rendering power. The RTX 5070 Ti sits in the 87th percentile of all GPUs, with an average benchmark score of 52086. It sits nearly identical to the NVIDIA GeForce RTX 4080, which has a deltaPct of 0.0, and is 2.5% ahead of the NVIDIA RTX A1000. The i5-10400F, however, is in the 73rd percentile of all CPUs with an average score of 14168. It is 0.4% ahead of the AMD EPYC 7552 but 1.1% behind the Intel Core i5-8500. This gap in percentile ranking between the CPU and GPU suggests the processor is the weaker link in this pairing, which becomes evident in the measured FPS data.

Settings Recommendations

The measured rows show that the "Ultra" preset provides the most visually demanding experience, but it comes with a significant performance cost. At 1080p, dropping from High to Ultra reduces the average FPS from 495.6 to 403.5, a loss of 92.1 frames per second. The jump from Medium to High is smaller, from 561.9 to 495.6. For the best balance of visual fidelity and raw speed, the "High" preset appears to be the sweet spot. It delivers 495.6 FPS at 1080p, which is still far beyond any display's refresh rate, while offering a substantial visual upgrade over Medium. At 1440p, High still holds 329.7 FPS, and at 4K it maintains 187.9 FPS. The data suggests that High is the most efficient preset, as it offers a significant visual improvement over Medium without the steep performance penalty seen when moving to Ultra. For players with high-refresh-rate 1080p or 1440p monitors, High is the recommended starting point.

Resolution Scaling

The FPS drop from 1080p to 4K is dramatic, but the pattern reveals a critical insight about the limiting component. At 1080p High, the system produces 495.6 FPS. Moving to 1440p High drops that to 329.7 FPS, a 33.5% decrease. Going from 1440p to 4K High drops the frame rate to 187.9 FPS, another 43.0% decrease. This scaling is not linear, and it indicates that at 1080p, the CPU is likely the limiting factor. The i5-10400F simply cannot issue draw calls fast enough to keep the RTX 5070 Ti fully occupied. As resolution increases, the GPU has to work harder on pixel shading, which shifts the bottleneck toward the graphics card. At 4K, the RTX 5070 Ti is finally being pushed, and the frame rates drop to a level that is more consistent with its raw compute capabilities. The data suggests that the CPU bottleneck is severe at 1080p, moderate at 1440p, and nearly resolved at 4K. The difference between the 1080p Low (583.9 FPS) and 4K Low (235.3 FPS) further confirms this, as the GPU becomes the clear constraint at higher resolutions.

Measured FPS Breakdown

Looking at the data resolution by resolution, the pattern is consistent. At 1920x1080, the average FPS ranges from a low of 403.5 on Ultra to a high of 583.9 on Low. The Medium preset sits at 561.9, and High at 495.6. These numbers are all above 400 FPS, which makes them practically indistinguishable on most monitors. The spread from Low to Ultra is 180.4 FPS, which is a significant range, but even the lowest number is far beyond playable. At 2560x1440, the performance drops noticeably. Low yields 408.7 FPS, Medium 373.4, High 329.7, and Ultra 265.9. The spread here is 142.8 FPS. The scaling from 1080p to 1440p is roughly a 30% reduction across all settings, which is typical for GPU-bound scenarios. At 3840x2160, the numbers become more grounded. Low produces 235.3 FPS, Medium 213.8, High 187.9, and Ultra 153.9. The spread is 81.4 FPS. The jump from 1440p to 4K is another steep drop, with High losing 141.8 FPS. These 4K numbers are still exceptionally high for Roblox, but they show the GPU is finally becoming the primary bottleneck, as the frame rate differences between settings become more pronounced relative to the resolution scaling.

GPU Role

The RTX 5070 Ti is a massive piece of hardware, and its specifications explain why it is not the limiting factor at lower resolutions. It has 16 GB of GDDR7 memory on a 256-bit bus, providing 896.0 GB/s of bandwidth. Its base clock is 2295 MHz with a boost clock of 2452 MHz. The card features 8960 shading units, 280 TMUs, and 96 ROPs. These numbers are all in the top tier of GPUs, and its benchmark results confirm this. It scores 32974 in Passmark G3D and 231226 in Geekbench OpenCL. In Roblox, however, the GPU’s massive compute power is underutilized at 1080p. The game’s rendering engine is not demanding enough to saturate the card’s capabilities. The data shows that at 1080p Low, the system achieves 583.9 FPS, which is likely close to the CPU’s maximum output. The GPU is essentially waiting for the CPU to send more work. At 4K, the GPU’s role becomes more critical. The 153.9 FPS on Ultra shows that the card is finally doing heavy lifting, but it is still not breaking a sweat given its 43.94 TFLOPS of FP32 compute power. The 16 GB of VRAM is more than enough for Roblox, and the 28 Gbps effective memory speed ensures that texture bandwidth is never a concern.

CPU Role

The Intel Core i5-10400F is the more modest component in this pairing, and the data shows it is the primary limiter in most scenarios. It has 6 cores and 12 threads, with a base clock of 2.90 GHz and a boost clock of 4.30 GHz. This Comet Lake processor has 12 MB of shared L3 cache and supports DDR4 memory. Its benchmark scores are respectable, with a Cinebench R23 multi-core score of 10297 and a single-core score of 1453. In Passmark, it scores 12115 in multi-thread and 2541 in single-thread. In Roblox, the CPU’s single-thread performance is what matters most. Roblox is known for being heavily single-threaded, and the i5-10400F’s 688 score in 3DMark single-thread indicates it can handle the game’s logic, but it is not a high-end part. The measured FPS at 1080p shows this clearly. The fact that 1080p Low (583.9 FPS) is barely higher than 1080p Medium (561.9 FPS) suggests that the CPU is the bottleneck. If the GPU were the limit, the frame rate would scale more directly with the graphical workload. Instead, the CPU is maxed out, and the GPU is waiting. At 4K, the CPU still has to feed the GPU, but the increased pixel workload gives the GPU more to do, which is why the frame rates drop more sharply. The 4.30 GHz boost clock is decent, but the 14 nm process node and older architecture mean it cannot match the per-core performance of newer CPUs. This is the classic case of a modern GPU being held back by an older mid-range CPU.