Roblox

Roblox is not a typical GPU stress test, and the data for the Intel Core i5-14400F + NVIDIA GeForce RTX 5090 combo proves it. With frame rates ranging from 181.8 FPS at 4K Ultra to 737.8 FPS at 1080p Low, this pairing produces an excess of performance that most displays cannot even utilize. The benchmark results indicate that the RTX 5090 is the dominant force here, but the CPU keeps pace well enough to avoid becoming the primary constraint until you drop to lower resolutions or settings.

Resolution Scaling

The most telling metric in this dataset is how average FPS scales when moving from 1080p to 4K. At 1080p High, the combo delivers 592.5 FPS. Stepping up to 1440p High drops that to 394.3 FPS, and at 4K High it falls further to 222.3 FPS. That is a 62.5% reduction in frame rate from 1080p to 4K at High settings, which is a massive drop that points directly at the GPU becoming the limiting factor. The RTX 5090 is working progressively harder as pixel count rises, and the data shows this clearly.

The trend is consistent across all settings. At Low settings, 1080p yields 737.8 FPS, 1440p yields 493.9 FPS, and 4K yields 282 FPS. At Ultra, the numbers are 479.6 FPS, 324.1 FPS, and 181.8 FPS respectively. The scaling ratio remains similar regardless of quality preset, which suggests that resolution is the dominant variable. The gap between 1080p and 1440p is larger than the gap between 1440p and 4K in percentage terms, but the absolute FPS loss is substantial at every step.

What this means practically is that the limiting component shifts with resolution. At 4K, the 222.3 FPS High result and 181.8 FPS Ultra result indicate that the GPU is the bottleneck, as the CPU has plenty of headroom at those lower frame rates. At 1080p Low, the 737.8 FPS result approaches the point where the CPU's single-thread performance could start to matter, but the i5-14400F handles it without capping the GPU. The data suggests this combo is overkill for 1080p in Roblox, but it remains smooth at every tested resolution and setting.

GPU Role

The NVIDIA GeForce RTX 5090 is the centerpiece of this configuration, and its specifications align with the measured results. It features 32 GB of GDDR7 memory on a 512-bit bus, delivering 1.79 TB/s of bandwidth. That memory subsystem is far beyond what Roblox requires, but it ensures there is no VRAM limitation at any resolution or setting tested. The GPU also carries 21760 shading units, 680 TMUs, and 176 ROPs, which are the raw resources that drive the high frame rates seen in the data.

Clock speeds are modest relative to the GPU's size, with a base clock of 2017 MHz and a boost clock of 2407 MHz. The memory runs at 1750 MHz, which translates to 28 Gbps effective. These clocks are not the story here; the sheer scale of the chip is. With 92,200 million transistors on a 750 mm² die built on TSMC's 5 nm process, the RTX 5090 has the compute throughput to push Roblox to 737.8 FPS at 1080p Low and still manage 282 FPS at 4K Low.

The GPU's benchmark percentile of 94 versus all GPUs is reflected in the game results. It sits near the top of the performance hierarchy, and the nearest rivals in synthetic benchmarks—the RTX 5090 D and RTX 5050 Mobile—score within 0.2% of it, but the measured FPS in Roblox shows the 5090 pulling far ahead of any typical gaming GPU. The 104.8 TFLOPS of FP32 performance is the kind of raw power that makes 4K Roblox at 222.3 FPS High possible, which is a result most other GPUs cannot approach.

How This Combo Ranks

The comboRankInGame field places this specific pairing at rank 3 out of 1800 tested combos. That is an elite position, putting it in the top 0.17% of all configurations tested for Roblox. The data shows that only two other CPU-GPU combinations deliver higher average FPS in this game, which is remarkable given the i5-14400F is not a flagship processor. The RTX 5090 is clearly doing the heavy lifting, but the CPU is not holding it back enough to drop the combo out of the top tier.

This rank makes sense when you consider the individual component percentiles. The GPU sits at the 94th percentile against all GPUs, while the CPU sits at the 88th percentile against all CPUs. Neither component is the absolute best in its class, but together they are near the top of the pile for Roblox specifically. The combination of a strong 10-core CPU and the fastest consumer GPU available creates a pairing that only a handful of other setups can beat.

The nearest CPU rivals in synthetic benchmarks—the Intel Core i7-12800H, AMD Ryzen 5 PRO 7645, AMD Ryzen 7 250, and Intel Core i7-13705H—all score within 0.2% of the i5-14400F on average. This suggests the CPU is not the differentiator here; the GPU is. If you were to swap in one of those rival CPUs with the same RTX 5090, the combo rank would likely stay similar. The data indicates that the GPU choice matters more for Roblox performance than the CPU choice, as long as the CPU is strong enough to feed it.

FAQ

Q: What frame rate can I expect at 4K Ultra with this combo?

A: The measured average FPS at 3840x2160 with Ultra settings is 181.8 FPS. That is the lowest result in the entire dataset, but it is still well above 144 Hz for most monitors.

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

A: At 1920x1080 Low, the combo hits 737.8 FPS. This is close to the ceiling where CPU single-thread performance could become a factor, but the data shows the i5-14400F keeps up with the RTX 5090 without causing a significant bottleneck.

Q: How much performance do I lose going from 1080p to 4K?

A: At High settings, the average FPS drops from 592.5 at 1920x1080 to 222.3 at 3840x2160. That is a 62.5% reduction in frame rate, which highlights the GPU's workload increase at higher resolutions.

Q: How does this combo rank compared to other tested systems?

A: It is ranked 3rd out of 1800 combos tested in Roblox. This places it in the top 0.17% of all configurations, meaning only two other CPU-GPU pairings deliver higher average FPS.

Q: Does the RTX 5090's 32 GB of VRAM matter for Roblox?

A: The 32 GB of GDDR7 memory with 1.79 TB/s bandwidth is far more than Roblox needs. The data shows no VRAM-related frame drops at any resolution or setting, so the memory size is not a limiting factor in this game.

Q: What is the difference between Low and Ultra settings at 1440p?

A: At 2560x1440, Low settings yield 493.9 FPS while Ultra yields 324.1 FPS. That is a 34.4% reduction in average FPS when moving from the lowest to the highest quality preset.

Measured FPS Breakdown

The full dataset provides a complete picture of performance across three resolutions and four quality presets. At 1920x1080, the average FPS ranges from a low of 479.6 at Ultra to a high of 737.8 at Low. Medium settings deliver 672.8 FPS, and High delivers 592.5 FPS. The scaling from Low to Ultra is a 35% drop, which is significant but leaves the system far above any display refresh rate.

At 2560x1440, the numbers are 493.9 FPS at Low, 447.5 FPS at Medium, 394.3 FPS at High, and 324.1 FPS at Ultra. The drop from Low to Ultra is 34.4%, nearly identical to the 1080p scaling. This consistency suggests that setting changes affect the GPU workload similarly across resolutions, with the pixel count being the primary differentiator.

At 3840x2160, the results are 282 FPS at Low, 251.5 FPS at Medium, 222.3 FPS at High, and 181.8 FPS at Ultra. The drop from Low to Ultra is 35.5%, again matching the pattern. However, the absolute values are much lower than at 1080p or 1440p, reinforcing that 4K is where the GPU is pushed hardest. Even at its worst, this combo never dips below 181.8 FPS, which is exceptional for a sandbox game.

CPU Role

The Intel Core i5-14400F is a 10-core, 16-thread processor based on Raptor Lake architecture, with a base clock of 2.50 GHz and a boost clock of 4.70 GHz. It has 20 MB of shared L3 cache and supports DDR4 and DDR5 memory. In synthetic benchmarks, it scores 21914 in Cinebench R23 multi-core and 3093 in single-core, placing it at the 88th percentile against all CPUs. These numbers show a strong mid-range performer that can handle modern games without issue.

In Roblox, the CPU's role is less prominent than the GPU's because the game is not heavily threaded. The 10 cores and 16 threads provide ample headroom, but the single-core performance is what matters most for frame rate generation. The 3093 single-core score in Cinebench R23 is solid, and the data shows it is sufficient to keep the RTX 5090 fed even at 1080p Low where the CPU is most likely to become a bottleneck.

The nearest CPU rivals all score within 0.2% of the i5-14400F in average synthetic benchmarks, which means the CPU is not a differentiator in this combo. The Intel Core i7-12800H, AMD Ryzen 5 PRO 7645, AMD Ryzen 7 250, and Intel Core i7-13705H all perform nearly identically. The fact that this combo ranks 3rd out of 1800 despite using a mid-range CPU suggests that the GPU is the dominant factor in Roblox performance, and the CPU simply needs to be good enough to avoid holding it back.