Roblox

Roblox is a notoriously CPU-bound sandbox title, but this pairing of an Intel Core i5-10400F with an NVIDIA GeForce RTX 4080 flips the script in a surprising way. The benchmark data shows a system that is capable of extraordinarily high frame rates at every resolution, yet the scaling patterns reveal that the processor—not the graphics card—is the primary architect of the experience. This combo ranks 368th out of 3,711 tested configurations, placing it in the top 10% of all pairings, but the specific numbers tell a more nuanced story about where the bottlenecks live and how to best configure the game.

Resolution Scaling

The frame rate data from 1080p to 4K shows a clear pattern of diminishing returns that is typical of a CPU-limited scenario at lower resolutions. At 1920x1080 with Low settings, the system produces 581 FPS, which drops to 429 FPS at 2560x1440, and further to 243 FPS at 3840x2160. That is a 58% drop from 1080p to 1440p, and a 58% drop again from 1440p to 4K. The consistency of these percentage drops suggests that while the GPU is being tasked more heavily at higher resolutions, the CPU’s single-thread performance is still the limiting factor even at 4K.

Look at the Medium settings row for a clearer picture. At 1080p Medium, the average is 563 FPS with a minimum of 478 FPS. At 1440p Medium, the average falls to 390 FPS, and at 4K Medium, it drops to 221 FPS. The gap between 1080p and 1440p is 173 FPS, while the gap between 1440p and 4K is 169 FPS. This nearly linear scaling indicates that the RTX 4080 has ample headroom to handle the increased pixel count; the real constraint is how fast the i5-10400F can feed it draw calls and physics updates.

The High settings row shows the same pattern with slightly lower absolute numbers: 517 FPS at 1080p, 345 FPS at 1440p, and 195 FPS at 4K. The Ultra preset tells the most interesting story. At 1080p Ultra, the system still manages 420 FPS, but at 4K Ultra, it falls to 158 FPS. The percentage drop from 1080p to 4K on Ultra is 62%, which is steeper than the Low preset’s 58%. This suggests that at Ultra settings, the GPU is finally starting to become a more significant contributor to the bottleneck, though the CPU still has the final say.

What this data says about the limiting component is that the i5-10400F is the ceiling for most of the range. The RTX 4080 is capable of far more than 581 FPS in this game, as evidenced by the fact that lowering the resolution does not produce massive jumps in performance. In a purely GPU-bound scenario, you would expect to see a much larger delta between 1080p and 1440p, but here the deltas are consistent, pointing to a CPU that is running near its maximum effective output.

CPU Role

The Intel Core i5-10400F is a 6-core, 12-thread processor from the Comet Lake architecture, built on a 14 nm process. Its base clock is 2.90 GHz, and it boosts to 4.30 GHz. The benchmark data shows a single-thread score of 688 in 3dmark and 1451 in Cinebench R23, which places it in the 68th percentile of all CPUs. This is a processor that was mid-range at launch in 2020, and its performance in Roblox is directly tied to its single-core capabilities.

Roblox is a game that historically relies heavily on a single main thread for game logic, physics, and rendering setup. The i5-10400F’s boost clock of 4.30 GHz is respectable, but it is not exceptional by modern standards. The data shows that the CPU’s 3dmark single-thread score of 688 is the key metric here. Compare that to its 3dmark max-threads score of 4735, which is nearly 7 times higher. This disparity indicates that the game is not leveraging the full multithreading capability of the processor.

The Cinebench R23 multicore score of 10283 shows that the CPU has solid overall throughput, but that is not what matters for Roblox. The game’s performance is governed by the single-thread score, and the i5-10400F’s 1451 in R23 single-core is what keeps the frame rates from going even higher. If you look at the measured FPS at 1080p Low (581 FPS), that number is likely very close to the maximum that this CPU can physically push in this game, regardless of how powerful the GPU is.

The CPU’s 12 MB of shared L3 cache and 64 KB of L1 cache per core are adequate for Roblox’s modest data footprint. The dual-channel DDR4 memory support with 42.7 GB/s bandwidth is not a bottleneck either, as the game’s memory access patterns are relatively simple. The data suggests that the i5-10400F is doing exactly what it is designed to do, but it is simply not fast enough to fully unlock the RTX 4080’s potential in this specific title.

Settings Recommendations

The measured FPS rows provide a clear picture of which settings preset offers the best experience. The Medium preset at 2560x1440 is the sweet spot for this combo. It delivers an average of 390 FPS with a minimum of 332 FPS, which is well above the refresh rate of any current monitor. The jump from Medium to High at 1440p costs 45 FPS (from 390 to 345), while the jump from High to Ultra costs 65 FPS (from 345 to 280). The visual difference between Medium and High in Roblox is often subtle, but the performance cost is measurable.

At 1920x1080, the Medium preset is also the recommended choice. It produces 563 FPS average with a minimum of 478 FPS, which is only 18 FPS slower than the Low preset (581 FPS). The gap between Medium and High at 1080p is 46 FPS (from 563 to 517), and the gap between High and Ultra is 97 FPS (from 517 to 420). The Low preset offers only a marginal advantage over Medium, so it is not worth the visual downgrade.

For 4K, the Medium preset at 221 FPS is the only sensible option if you want to stay above 200 FPS. The High preset at 195 FPS is still playable, but the Ultra preset at 158 FPS starts to dip into territory where you might notice stuttering on a high-refresh-rate display. The minimum FPS recorded for Medium at 4K is 188, which is still very smooth. The data shows that Medium is the best balance between visual quality and performance across all three resolutions.

The Ultra preset is the only one that shows a significant performance penalty, and it is not worth the cost in this game. Roblox’s visual effects at Ultra do not justify a 25% frame rate reduction when the difference between Medium and Ultra is often imperceptible in fast-paced gameplay. Stick with Medium for the most consistent experience.

How This Combo Ranks

This specific combination of the Intel Core i5-10400F and the NVIDIA GeForce RTX 4080 ranks 368th out of 3,711 tested combos in Roblox. That places it in the top 9.9% of all configurations. The CPU’s percentile of 68% and the GPU’s percentile of 86% would suggest a balanced pairing, but the actual in-game rank is lower than the GPU’s percentile alone would predict. This is because Roblox is so heavily CPU-bound that the GPU’s raw power is not fully utilized.

The nearest rivals to the i5-10400F in the benchmark database all have similar average scores, with deltas of less than 1%. The Intel Xeon 6756E is 0.2% faster, the AMD Ryzen 3 7320C is 0.6% slower, and the AMD EPYC 7552 is 0.5% faster. These are all server or low-power parts, which highlights that the i5-10400F’s gaming performance is competitive with much more expensive hardware in this specific game.

The RTX 4080’s nearest rivals show a similar clustering. The RTX 4080 SUPER is 0.1% faster, while the AMD Radeon Pro W5700X is 1.1% slower, and the AMD Radeon RX 6750 GRE 12 GB is 2.6% slower. The fact that the RTX 4080 is only 0.1% slower than the RTX 4080 SUPER confirms that the GPU is not the limiting factor here. If it were, we would see a larger gap between these two cards.

The combo rank of 368 out of 3,711 is a strong showing, but the data suggests that a faster CPU would push this configuration much higher. The GPU is essentially coasting, and the entire performance envelope is defined by the i5-10400F’s single-thread speed. If you were to pair this GPU with a processor that has a higher single-thread score, the rank would improve dramatically.

GPU Role

The NVIDIA GeForce RTX 4080 is a 5 nm Ada Lovelace part with 16 GB of GDDR6X memory on a 256-bit bus, delivering 716.8 GB/s of bandwidth. Its base clock is 2205 MHz, and it boosts to 2505 MHz. The benchmark data shows a 3dmark Steel Nomad score of 6567 and a Passmark G3D score of 34457, which places it in the 86th percentile of all GPUs. This is an exceptionally powerful card, but in Roblox, its role is more about consistency than raw output.

The GPU’s 16 GB of VRAM is entirely irrelevant for Roblox, as the game’s textures and geometry are simple enough to fit in a fraction of that capacity. The 716.8 GB/s of memory bandwidth is also overkill for this title. The data shows that the RTX 4080 is never the bottleneck at any resolution or settings preset. The minimum FPS at 4K Medium is 188, which is still far above what most players would consider a playable threshold.

The GPU’s 48.74 TFLOPS of FP32 performance is not being utilized to its full extent because the CPU cannot feed it enough work. The 3dmark Steel Nomad score of 6567 is a measure of raw DX12 performance, but Roblox’s rendering pipeline is not that demanding. The RTX 4080 is effectively running at a fraction of its capacity, which is why the frame rates are so high but also why the scaling between resolutions is so linear.

The GPU’s clock behavior is also noteworthy. The boost clock of 2505 MHz is maintained easily, but the card is likely spending most of its time at lower power states because it is waiting for the CPU. The 320 W TDP and 700 W suggested PSU are more than sufficient for this workload, but the card’s triple-slot cooler and 310 mm length are overkill for a game that does not stress it. This is a case where the GPU is the wrong tool for the job, not in terms of capability, but in terms of what the game actually needs.

Measured FPS Breakdown

The complete set of measured FPS data is as follows. At 1920x1080, the Low preset averages 581 FPS, the Medium preset averages 563 FPS with a minimum of 478 FPS and a maximum of 647 FPS, the High preset averages 517 FPS, and the Ultra preset averages 420 FPS. The spread from Low to Ultra is 161 FPS, which is a 28% reduction in performance for the highest visual quality.

At 2560x1440, the Low preset averages 429 FPS, the Medium preset averages 390 FPS with a minimum of 332 FPS and a maximum of 449 FPS, the High preset averages 345 FPS, and the Ultra preset averages 280 FPS. The spread from Low to Ultra is 149 FPS, which is a 35% reduction. The percentage drop from Low to Ultra increases with resolution, confirming that the GPU becomes more involved at higher pixel counts.

At 3840x2160, the Low preset averages 243 FPS, the Medium preset averages 221 FPS with a minimum of 188 FPS and a maximum of 254 FPS, the High preset averages 195 FPS, and the Ultra preset averages 158 FPS. The spread from Low to Ultra is 85 FPS, which is a 35% reduction. The consistency of the percentage drop from 1440p to 4K (both around 35%) indicates that the system is hitting a balanced point where both CPU and GPU are contributing to the bottleneck.

The Medium preset is the only one with recorded minimum and maximum FPS values across all resolutions, which suggests it is the most stable setting. The minimum FPS at 4K Medium (188) is higher than the average FPS at 4K Ultra (158), which reinforces the recommendation to use Medium for the best experience. The data shows that this combo is capable of over 500 FPS at 1080p, over 400 FPS at 1440p, and over 200 FPS at 4K, which is exceptional by any standard. The limiting factor is always the CPU, and the RTX 4080 is merely along for the ride, delivering consistent frame times without ever breaking a sweat.