Roblox

# Roblox Performance Analysis: Intel Core i5-11400F + NVIDIA GeForce RTX 5090 D

The pairing of Intel's six-core Core i5-11400F with NVIDIA's flagship RTX 5090 D produces an unusual bottleneck profile in Roblox, where frame rates scale dramatically with resolution but remain exceptionally high across all settings. The measured data shows this combination ranks 50th out of 3,010 tested combos in this game, placing it in the top 1.7% of all configurations. The RTX 5090 D sits in the 92nd percentile among all GPUs, while the i5-11400F lands in the 71st percentile among all CPUs, suggesting a substantial performance gap between components that manifests clearly in Roblox's CPU-light workload.

Resolution Scaling

The frame rate progression from 1080p to 4K reveals a system that remains GPU-bound even at the highest resolution, though the margin narrows considerably. At Low settings, the average FPS drops from 682 at 1920x1080 to 518 at 2560x1440, then further to 293 at 3840x2160. This represents a 24% reduction from 1080p to 1440p, followed by a 43% reduction from 1440p to 4K. The total scaling from 1080p to 4K at Low settings is a 57% performance loss, which is substantial but still leaves the system delivering nearly 300 FPS at 4K.

The High settings preset follows a similar pattern with slightly steeper drops. From 625 FPS at 1080p, the average falls to 417 FPS at 1440p (a 33% reduction) and then to 236 FPS at 4K (a 43% reduction from 1440p). The 1080p to 4K scaling at High settings shows a 62% loss, indicating that higher graphical fidelity amplifies the resolution penalty. Medium settings show the gentlest curve between 1080p and 1440p, with only a 29% drop from 660 to 471 FPS, but then suffer a 43% reduction when moving to 4K at 267 FPS.

Ultra settings produce the most dramatic resolution scaling, with 507 FPS at 1080p falling to 338 FPS at 1440p (a 33% reduction) and then to 191 FPS at 4K (a 43% reduction). The consistency of the 43% penalty between 1440p and 4K across all settings presets suggests a clear GPU limitation emerging at higher pixel counts. However, the fact that even the worst case (Ultra at 4K) still exceeds 190 FPS indicates that the RTX 5090 D's enormous computational resources—its 104.8 TFLOPS FP32 throughput and 1.79 TB/s memory bandwidth—are never fully stressed by Roblox's rendering demands.

FAQ

Q: Why does the RTX 5090 D, a 92nd-percentile GPU, only reach 236 FPS at 4K High settings?

A: Roblox is a sandbox game with relatively simple geometry and shading requirements compared to modern AAA titles. The measured data shows the RTX 5090 D's Passmark G3D score of 44,065, which is only 1.1% ahead of the AMD Radeon RX 6650M XT in the nearestRivals comparison. This suggests Roblox's workload does not scale with the GPU's raw compute capabilities, limiting the benefit of the 5090 D's massive specifications.

Q: Is the Core i5-11400F holding back the RTX 5090 D in this game?

A: The data indicates the CPU is not the primary bottleneck at 4K, where frame rates drop by 43% compared to 1440p across all settings. However, at 1080p Low settings, the system reaches 682 FPS, and the i5-11400F's Cinebench R23 single-core score of 2,024 and Passmark single-thread score of 2,981 suggest it can drive high frame rates. The CPU's 71st percentile ranking versus the GPU's 92nd percentile indicates some imbalance, but Roblox's relatively light CPU load means the six cores and 12 threads are sufficient.

Q: What is the best resolution for competitive play based on the data?

A: At 1920x1080 with Low settings, the system achieves 682 FPS, which is the highest average across all measured configurations. This represents a 2.3x advantage over 4K Low settings at 293 FPS. For maximum frame rates, the 1080p Low preset is the clear choice, though even 4K Low at 293 FPS exceeds the refresh rate of most displays.

Q: How does the RTX 5090 D's memory configuration affect Roblox performance?

A: The GPU's 32 GB of GDDR7 memory on a 512-bit bus provides 1.79 TB/s of bandwidth, which is far beyond Roblox's requirements. The memory clock runs at 1750 MHz with 28 Gbps effective speed. The measured FPS at 4K Ultra (191 FPS) versus 4K Low (293 FPS) shows only a 35% penalty for maximum settings, indicating that memory bandwidth is not a limiting factor even at the highest resolution.

Q: Does the i5-11400F's boost clock of 4.40 GHz contribute to the high frame rates?

A: The boost clock, combined with the base clock of 2.60 GHz, allows the CPU to scale performance dynamically. The 3DMark single-thread score of 868 and 2-thread score of 1,691 demonstrate solid single-core performance. In Roblox, where physics and game logic often run on single threads, this boost capability likely helps maintain the 507 FPS minimum at 1080p Ultra, though the CPU's 14 nm process node and 65 W TDP limit its ceiling compared to newer architectures.

Q: What does the combo's rank of 50 out of 3,010 signify?

A: This ranking places the configuration in the 98.3rd percentile of all tested combinations for Roblox. The GPU's 92nd percentile ranking and the CPU's 71st percentile ranking combine to produce a system that outperforms the vast majority of alternatives, despite the apparent component mismatch. The deltaPct values in nearestRivals show the i5-11400F is within 0.6% of the AMD Ryzen 3 PRO 8300G and 0.4% of the Intel Core i5-12450H in average benchmark scores.

GPU Role

The RTX 5090 D's specifications are almost absurdly over-provisioned for Roblox. Its 21,760 shading units, 680 texture mapping units, and 176 ROPs provide massive parallel processing capability, while the 170 ray tracing cores and 680 tensor cores offer features that Roblox's rendering engine likely does not utilize. The GPU's pixel rate of 423.6 GPixel/s and texture rate of 1,636.8 GTexel/s are theoretical maximums that the game's modest visual complexity never approaches.

The 32 GB of GDDR7 memory is another example of extreme over-provisioning. Roblox's blocky environments and simple textures require far less memory capacity, and the 512-bit memory bus delivering 1.79 TB/s bandwidth ensures that memory bandwidth is never a constraint. The measured FPS data supports this: at 4K Ultra, the system still produces 191 FPS, which indicates the GPU is operating well within its capabilities. The difference between Low and Ultra settings at 4K is 102 FPS (293 vs 191), showing that even the most demanding preset in Roblox cannot stress this GPU.

The GPU's benchmark data reveals interesting characteristics. Its 3DMark Steel Nomad DX12 score of 14,326 and Passmark G3D score of 44,065 place it in the 92nd percentile, yet its nearestRivals include the AMD Radeon RX 6650M XT (1.1% slower) and RX 6850M XT (1.6% faster). This clustering suggests that in Roblox, the GPU's performance is not determined by its raw compute power but rather by factors like driver overhead and game engine efficiency. The Geekbench OpenCL score of 310,674 and Vulkan score of 376,915 indicate strong compute performance, but Roblox's DirectX 11 rendering path (as evidenced by the Passmark DirectX 11 score of 371) may not fully leverage these capabilities.

Measured FPS Breakdown

At 1920x1080, the system delivers its highest frame rates across all presets. Low settings produce 682 FPS average, Medium settings 660 FPS (with a minimum of 561 and maximum of 759), High settings 625 FPS, and Ultra settings 507 FPS. The spread from Low to Ultra is 175 FPS, representing a 26% performance penalty for maximum visual quality. The Medium preset's minimum of 561 FPS ensures smooth gameplay even in demanding scenes, while the maximum of 759 FPS shows the GPU's headroom at this resolution.

The 2560x1440 results show a significant step down. Low settings average 518 FPS, Medium 471 FPS (minimum 401, maximum 542), High 417 FPS, and Ultra 338 FPS. The penalty from 1080p ranges from 24% at Low to 33% at High and Ultra. The Medium preset's minimum of 401 FPS still comfortably exceeds 240 Hz refresh rate displays, while the Ultra preset's 338 FPS average remains highly playable. The 180 FPS difference between Low and Ultra at 1440p is proportionally similar to the 1080p spread, indicating consistent scaling.

At 3840x2160, the frame rates drop more dramatically. Low settings produce 293 FPS, Medium 267 FPS (minimum 227, maximum 307), High 236 FPS, and Ultra 191 FPS. The 4K Ultra result is the only measured configuration that falls below 200 FPS, though it remains well above standard 144 Hz displays. The Medium preset's minimum of 227 FPS ensures no frame rate dips below the refresh rate of most high-end monitors. The scaling from 1080p to 4K at each preset shows a consistent 57-62% performance loss, confirming that resolution is the primary factor limiting frame rates.

CPU Role

The Intel Core i5-11400F provides six cores and 12 threads based on the Rocket Lake architecture, manufactured on Intel's 14 nm process. Its base clock of 2.60 GHz boosts to 4.40 GHz, and the 12 MB of shared L3 cache (with 80 KB L1 and 512 KB L2 per core) provides adequate data locality for game workloads. The CPU's memory support for DDR4 with dual-channel configuration delivers 51.2 GB/s bandwidth, which is sufficient for Roblox's requirements.

The CPU's benchmark results show a balanced profile. Its Cinebench R23 multicore score of 14,340 and single-core score of 2,024 indicate strong performance for a 65 W part. The Passmark multithread score of 16,908 and single-thread score of 2,981 further confirm this. The 3DMark results show scaling from 868 (single-thread) to 5,652 (max threads), demonstrating good multi-threading efficiency. The Geekbench multicore score of 7,737 and single-core score of 1,777 place it in the 71st percentile of all CPUs.

In Roblox specifically, the CPU's role is to handle game logic, physics simulations, and draw call submission. The measured FPS at 1080p Low (682 FPS) suggests the CPU can process frames faster than the GPU can render them at lower resolutions. However, the i5-11400F's nearestRivals show it is essentially tied with the AMD EPYC 7H12 (0.3% faster), Intel Core i5-12450H (0.4% slower), and AMD Ryzen 3 PRO 8300G (0.6% slower) in average benchmark scores. This tight grouping indicates that the CPU's performance in Roblox is not exceptional but adequate, with the GPU handling most of the rendering workload.

Settings Recommendations

For players prioritizing maximum frame rates, the 1080p Low preset delivers the best measured performance at 682 FPS average. This configuration is ideal for competitive gameplay where every frame counts, though the visual quality reduction may be noticeable. The 1440p Low preset at 518 FPS offers a strong balance between resolution and speed, providing 76% of the 1080p Low performance while nearly doubling the pixel count.

The Medium presets provide the most consistent experience across resolutions. At 1080p, Medium delivers 660 FPS with a minimum of 561 FPS and maximum of 759 FPS, representing a 3% reduction from Low but with better visual fidelity. The 1440p Medium preset at 471 FPS (minimum 401, maximum 542) is the highest frame rate option that maintains a 240 Hz refresh rate lock, while the 4K Medium preset at 267 FPS (minimum 227, maximum 307) ensures smooth gameplay on high-refresh 4K displays.

For visual quality enthusiasts, the Ultra preset at 1440p provides 338 FPS, which is still exceptionally high and offers the best balance of image quality and performance in the measured data. The 4K Ultra preset at 191 FPS is the only configuration that drops below 200 FPS but remains perfectly playable on 144 Hz monitors. The High presets offer marginal improvements over Medium in visual terms but show 5-12% lower frame rates, making Medium the more efficient choice across all resolutions. The data clearly indicates that Medium settings provide the best experience per frame rate cost, with the 1440p Medium configuration standing out as the sweet spot for this hardware combination.