Roblox

# Roblox with Intel Core i5-13400F + NVIDIA GeForce RTX 4090

The Intel Core i5-13400F paired with the NVIDIA GeForce RTX 4090 delivers extreme frame rates in Roblox, with the data showing this combination ranks 144th out of 3,711 tested combos, placing it in the top 4% of all systems tested for this game. The RTX 4090's raw graphics power is so overwhelming for Roblox that the performance ceiling shifts almost entirely to the CPU, as evidenced by frame rates ranging from 175 FPS at 4K Ultra to 711 FPS at 1080p Low. This is a case where the GPU is massively over-provisioned, and the i5-13400F's 10 cores and 16 threads become the primary factor determining whether the system can push past the 500 FPS mark at lower resolutions.

Resolution Scaling

The frame rate scaling from 1080p to 4K reveals a system where GPU load increases dramatically but never becomes a bottleneck, even at the highest resolution. At High settings, the average frame rate drops from 572 FPS at 1080p to 382 FPS at 1440p, then to 216 FPS at 4K — a 62% reduction from 1080p to 4K. This steep drop across resolutions is typical of a GPU-bound scenario, but the absolute values remain so high that the RTX 4090 is still delivering over 200 FPS at 4K, which is far beyond what Roblox's engine needs for smooth gameplay.

The scaling pattern at Low settings shows a similar trend but with higher absolute numbers: 711 FPS at 1080p, 474 FPS at 1440p, and 268 FPS at 4K. The drop from 1080p to 1440p is 33%, while the drop from 1440p to 4K is 43%. This non-linear scaling suggests that at 1080p Low, the system is partially CPU-limited, as the frame rate of 711 FPS is extraordinarily high and likely approaching the engine's practical limits. At 4K, the GPU is doing more work, but the RTX 4090's 24 GB of GDDR6X memory and 1.01 TB/s bandwidth keep it well ahead of what Roblox demands.

Medium settings show the most complete data with min and max FPS recorded. At 4K Medium, the average is 244 FPS with a range of 208 to 281 FPS, while at 1080p Medium, the average jumps to 647 FPS with a range of 550 to 744 FPS. The gap between min and max FPS widens at lower resolutions (194 FPS at 1080p versus 73 FPS at 4K), which indicates that at 1080p, CPU fluctuations have more impact on frame pacing, while at 4K, the GPU maintains a more consistent output. The data suggests that for Roblox, 4K is where this combo is most balanced, as the GPU is sufficiently loaded to prevent CPU-related frame spikes, yet the average FPS remains high enough for any display.

GPU Role

The NVIDIA GeForce RTX 4090 is the dominant component in this pairing, with its 24 GB of GDDR6X memory, 384-bit memory bus, and 82.58 TFLOPS of FP32 compute power. In Roblox, the GPU's role at 4K Ultra is to render complex scenes with shadows, lighting, and post-processing effects, which explains why Ultra settings produce the lowest average FPS of 175 at 4K, compared to 268 at Low settings. The 24 GB VRAM is far more than Roblox requires, meaning memory capacity is never a limiting factor, but the GPU's clock speeds — base 2235 MHz and boost 2520 MHz — are what drive the high frame rates across all settings.

The RTX 4090's nearest rivals in the benchmark database include the Intel Arc Pro A60 with an average score of 60,326 (0% deltaPct), the AMD Radeon Pro W6600M at 61,896 (-2.5% deltaPct), and the AMD Radeon PRO V710 at 58,657 (2.9% deltaPct). The RTX 4090's average benchmark score of 60,347 places it just ahead of the Arc Pro A60, but the delta percentages are so small that these GPUs are effectively tied in synthetic benchmarks. However, in Roblox, the RTX 4090's performance is defined less by these synthetic scores and more by its ability to maintain 175 to 711 FPS depending on resolution and settings, which confirms its real-world gaming capability.

The GPU's 128 RT cores and 512 tensor cores are largely irrelevant for Roblox, as the game does not use ray tracing or DLSS in a meaningful way. Instead, the RTX 4090's 16,384 shading units and 512 TMUs handle the game's relatively simple geometry and textures with ease. The pixel rate of 443.5 GPixel/s and texture rate of 1,290.2 GTexel/s ensure that even at 4K, the GPU can fill pixels faster than the CPU can feed it draw calls. The data shows that at 4K Ultra, the GPU is finally being exercised enough to drop the average FPS to 175, which is still 2.5 times higher than a standard 60 Hz display's refresh rate.

Settings Recommendations

The measured FPS data points to Medium settings as the optimal choice for this combo, as it offers the best balance between visual quality and frame rate consistency across all resolutions. At 4K Medium, the system delivers 244 FPS average with a minimum of 208 FPS and maximum of 281 FPS, which means even the worst-case frame time stays above 200 FPS — more than enough for smooth gameplay on any current display. In contrast, 4K Ultra drops the average to 175 FPS, and while that is still high, the lack of min/max data suggests potential variability that Medium settings mitigate.

At 1440p, Medium settings produce 432 FPS average with a range of 367 to 496 FPS, which is 22 FPS higher than High settings at the same resolution. The 39% improvement from Ultra to Medium at 1440p (310 to 432 FPS) comes with minimal visual sacrifice in Roblox, as the game's art style does not heavily rely on the advanced effects that Ultra settings enable. For 1080p users, Medium settings at 647 FPS average with a 550 to 744 FPS range is the clear winner, as Low settings only add 64 FPS (711 FPS) but remove visual features that make the game more immersive.

The data shows that High settings are a reasonable middle ground for users who want better visuals without the performance hit of Ultra. At 4K High, the system achieves 216 FPS, which is 41 FPS higher than Ultra but 28 FPS lower than Medium. The difference between High and Medium is more pronounced at lower resolutions: at 1080p, High delivers 572 FPS versus Medium's 647 FPS, a 13% difference. Given that Roblox is a sandbox game where frame rate consistency matters more than marginal visual upgrades, Medium settings provide the most stable experience, especially when considering that the minimum FPS at Medium is 208 at 4K, 367 at 1440p, and 550 at 1080p — all well above the threshold for competitive play.

How This Combo Ranks

This combo ranks 144th out of 3,711 tested combinations for Roblox, placing it in the top 3.9% of all systems in the benchmark database. This ranking is remarkable when considering that the RTX 4090 is an end-of-life product and the i5-13400F is a mid-range 13th-gen Core processor, yet together they outperform the vast majority of systems tested in this game. The combo's position suggests that Roblox is not particularly demanding on hardware, and that the i5-13400F's 20 MB of L3 cache and 4.60 GHz boost clock are sufficient to feed the RTX 4090's massive frame-producing capacity.

The CPU's nearest rivals in the benchmark database include the AMD Ryzen 9 6900HS, which scores 25,284 (0% deltaPct compared to the i5-13400F's 25,292 average), and the Intel Core 5 120 at 25,362 (-0.3% deltaPct). These tiny delta percentages indicate that the i5-13400F is performance-parity with several other CPUs in synthetic tests, but in Roblox, the combination of 10 cores, 16 threads, and high boost clocks gives it an edge in maintaining high frame rates at lower resolutions where CPU bound becomes more likely. The GPU's ranking at the 88th percentile of all GPUs, combined with the CPU's 77th percentile ranking, produces a system that is better than the sum of its parts for this specific game.

Given that Roblox is a CPU-light game with simple graphics, the combo's rank of 144 is more a reflection of the RTX 4090's overwhelming power than the i5-13400F's contribution. The data shows that this combo sits above 3,567 other tested systems, and the only ways to achieve higher ranks would involve even faster CPUs or more exotic configurations. For the vast majority of Roblox players, this combo delivers frame rates that are 2 to 11 times higher than what a standard 60 Hz or 144 Hz display can show, meaning the system is effectively future-proofed for any Roblox update.

CPU Role

The Intel Core i5-13400F plays a critical role in this combo, particularly at lower resolutions where the GPU has spare capacity and the CPU becomes the limiting factor. With 10 cores (6 performance and 4 efficiency), 16 threads, and a boost clock of 4.60 GHz, the i5-13400F is well-suited to Roblox's multi-threaded workload, which can utilize multiple cores for physics, scripting, and world generation. The CPU's 20 MB of shared L3 cache and 1.25 MB L2 cache per core help reduce memory latency, which is important for maintaining consistent frame times in a game where player-created content can cause sudden CPU spikes.

The CPU's benchmark scores show strong multi-threaded performance, with a Cinebench R23 multi-core score of 22,604 and a single-core score of 3,191. The PassMark multi-thread score of 25,032 and single-thread score of 3,634 indicate that the i5-13400F can handle both lightly-threaded and heavily-threaded workloads, which is crucial for Roblox's mixed rendering and simulation tasks. At 1080p Low settings, the system achieves 711 FPS, which is likely near the CPU's practical limit for this game; the fact that increasing resolution to 4K Low only drops the frame rate to 268 FPS (a 62% reduction) confirms that the CPU can feed the GPU with enough data to saturate it at any resolution.

The data reveals that the CPU becomes more of a bottleneck at lower resolutions and lower settings, as evidenced by the 194 FPS spread between minimum and maximum at 1080p Medium (550 to 744 FPS) compared to 73 FPS at 4K Medium (208 to 281 FPS). This indicates that at 1080p, the CPU's frame delivery is less consistent, likely due to Roblox's single-threaded aspects that can cause occasional stalls. However, the i5-13400F's single-core performance, as measured by PassMark at 3,634 and Geekbench at 1,996, is strong enough to keep average frame rates above 460 FPS even at Ultra settings across all resolutions, which is more than sufficient for any practical use case.

Measured FPS Breakdown

At 1920x1080, the system delivers its highest frame rates across all settings. Low settings produce an average of 711 FPS, Medium settings average 647 FPS with a range of 550 to 744 FPS, High settings average 572 FPS, and Ultra settings average 464 FPS. The 1080p results show a clear progression: each step from Low to Ultra reduces the average frame rate by roughly 60 to 80 FPS, with the largest drop occurring from High to Ultra (108 FPS). The minimum FPS at Medium (550) is higher than the average FPS at Ultra (464), demonstrating that Medium settings provide a more consistent experience than Ultra.

At 2560x1440, frame rates remain exceptionally high, with Low settings averaging 474 FPS, Medium averaging 432 FPS (range 367 to 496 FPS), High averaging 382 FPS, and Ultra averaging 310 FPS. The scaling from 1080p to 1440p reduces frame rates by 25-34% depending on settings, with Low settings showing the largest drop (237 FPS) and Ultra showing the smallest (154 FPS). The minimum FPS at 1440p Medium (367) is still above the maximum FPS at 4K Ultra (175 FPS), highlighting the resolution's significant impact on performance.

At 3840x2160, the system still delivers very high frame rates, with Low settings averaging 268 FPS, Medium averaging 244 FPS (range 208 to 281 FPS), High averaging 216 FPS, and Ultra averaging 175 FPS. The 4K results show the smallest gap between Low and Ultra (93 FPS) compared to 1080p (247 FPS), confirming that the GPU is more heavily utilized at this resolution. The Medium settings at 4K produce a minimum FPS of 208, which is the lowest minimum recorded across all resolution/setting combinations, but it still represents a smooth experience. The data shows that this combo can handle any resolution or setting Roblox offers, with the weakest performance being 175 FPS at 4K Ultra — a figure that most systems cannot achieve even at 1080p.