Roblox

Roblox is a notoriously lightweight sandbox title, and the measured results for the Intel Core i5-11400F paired with the AMD Radeon RX 6800 XT reflect that, showing massive frame rates across all tested configurations. The data indicates a system that is overwhelmingly GPU-bound at higher resolutions but transitions into a more CPU-sensitive state at 1080p, where the processor's single-thread performance becomes the limiting factor. This analysis breaks down the measured FPS rows to explain how the resolution and settings interact with this specific hardware combination.

Resolution Scaling

The resolution scaling pattern in this dataset reveals a classic transition from a CPU-limited state at 1080p to a GPU-limited state at 4K. At 1920x1080 with High settings, the combo produces an average of 376 FPS. Moving to 2560x1440 drops that to 251 FPS, a reduction of 125 FPS (approximately 33%). The jump to 3840x2160 yields 142 FPS, another 109 FPS drop (approximately 43%). This steep decline as resolution increases indicates that the Radeon RX 6800 XT is the primary bottleneck at 4K, while the Core i5-11400F’s capabilities are being stretched at lower resolutions.

The Low preset data tells a similar story but with different magnitudes. At 1080p Low, the system reaches 468 FPS, which is the highest recorded average in the entire dataset. At 1440p Low, it drops to 312 FPS, and at 4K Low, it falls to 176 FPS. The percent drop from 1080p to 1440p is about 33%, and from 1440p to 4K it is approximately 44%. These figures are close to the High preset deltas, suggesting that even at Low settings, the GPU's workload scales predictably with pixel count.

What is more revealing is the gap between Low and High at each resolution. At 1080p, the difference between Low (468 FPS) and High (376 FPS) is 92 FPS, or about 20%. At 1440p, the gap narrows to 61 FPS (312 vs. 251), and at 4K, it shrinks to 34 FPS (176 vs. 142). This shrinking delta shows that as resolution rises, the GPU becomes so saturated that the additional work required by High settings has a smaller relative impact. The limiting component shifts decisively from the CPU at 1080p to the GPU at 4K, where even the RX 6800 XT's 16 GB of GDDR6 memory and 512.0 GB/s bandwidth are pushed hard by the pixel count.

The Medium preset results reinforce this trend. The 4K Medium row is the only one with complete min and max FPS data (136 min, 185 max), which shows a 49 FPS variance. At 1080p Medium, the average is 425 FPS, with a min of 362 and max of 489, a variance of 127 FPS. This wider variance at lower resolution suggests frame pacing is less consistent when the CPU is more involved, as the i5-11400F's six cores and twelve threads work to feed the GPU.

Settings Recommendations

The measured rows show that the Ultra preset is the most demanding, but the frame rates remain exceptionally high for a game like Roblox. At 4K Ultra, the average is 115 FPS, which is still above the standard 60 FPS target. At 1440p Ultra, it climbs to 204 FPS, and at 1080p Ultra, it reaches 305 FPS. Given these numbers, Ultra is a viable option even at 4K for this title, provided the user prioritizes visual fidelity over raw frame rate.

However, the best experience per the measured data appears to be the Medium preset at 1440p or 4K. At 1440p Medium, the system averages 284 FPS with a min of 241 and max of 327. This provides a very high refresh rate experience with minimal risk of dropping below 240 FPS. At 4K Medium, the average is 161 FPS with a min of 136, which still supports smooth gameplay on high-refresh-rate 4K displays. The High preset sits between Medium and Ultra, offering 251 FPS at 1440p and 142 FPS at 4K, but it does not provide a meaningful advantage over Medium in terms of stability, as the min FPS data is missing for High.

For competitive play where frame rate is paramount, the Low preset at 1080p is the clear choice, delivering 468 FPS average. This is nearly 100 FPS higher than High at the same resolution, and it minimizes the CPU bottleneck. The data suggests that Low at 1080p is the optimal configuration for esports-style gameplay, while Medium at 1440p offers the best balance of visual quality and performance for most users. The Ultra preset, while playable, sees the largest performance cost—about 19% lower than High at 1080p (305 vs. 376 FPS)—which may not justify the visual gains in a blocky sandbox aesthetic.

GPU Role

The AMD Radeon RX 6800 XT is a high-end graphics card with 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. Its boost clock is rated at 2250 MHz, with a game clock of 2015 MHz and a base clock of 1825 MHz. These specifications place it in the 85th percentile of all GPUs in the benchmark database, and its average benchmark score of 48477 is notably higher than its nearest rivals, including the NVIDIA RTX A1000 Mobile (47743, +1.5%) and the Intel Arc A550M (49737, -2.5%).

In Roblox, the GPU's role is heavily dependent on resolution. At 4K, the card is the primary bottleneck, as evidenced by the significant FPS drops when moving from 1440p to 4K. The jump from 251 FPS (1440p High) to 142 FPS (4K High) represents a 43% reduction, which is consistent with the pixel count increase from 3.7 million to 8.3 million. The RX 6800 XT's 20.74 TFLOPS of FP32 performance and 288.0 GPixel/s pixel rate are sufficient to drive these frame rates, but the data shows that Roblox's rendering demands scale almost linearly with resolution.

The VRAM capacity of 16 GB is more than adequate for Roblox, which is not a VRAM-intensive title. Even at 4K Ultra, the game does not appear to be limited by memory capacity, as the frame rate only drops to 115 FPS, which is still playable. The 2000 MHz memory clock (16 Gbps effective) and 512.0 GB/s bandwidth provide ample headroom for the game's texture and geometry data. The GPU's DirectX 12 Ultimate support (12_2) and Vulkan 1.4 API compatibility ensure it can handle the game's rendering paths efficiently, though Roblox's engine is not known for pushing modern graphics features.

The GPU's benchmark data shows strong compute performance, with a Passmark G3D score of 24980 and a Geekbench OpenCL score of 171304. These numbers indicate that the RX 6800 XT is capable of far more demanding workloads than Roblox presents, but the measured FPS shows that at 4K Ultra, the card is still working hard to maintain 115 FPS, suggesting that the game's shader complexity or draw calls are more demanding than expected for its visual style.

FAQ

Q: What is the highest average FPS recorded for this combo?

A: The highest average FPS is 468, achieved at 1920x1080 resolution with the Low preset. This is significantly higher than the next best config, which is 425 FPS at 1080p Medium.

Q: How does the combo perform at 4K Ultra settings?

A: At 3840x2160 with Ultra settings, the combo averages 115 FPS. This is the lowest average in the dataset but still exceeds the 60 FPS threshold for smooth gameplay.

Q: Is the CPU or GPU the bottleneck at 1440p?

A: The data shows a 33% drop from 1080p to 1440p at High settings (376 to 251 FPS), which is less severe than the 43% drop from 1440p to 4K. This indicates the GPU becomes more of a limiting factor at 4K, while the CPU is more involved at 1440p, though neither is a hard bottleneck.

Q: What is the frame time variance at 1080p Medium?

A: At 1080p Medium, the measured min FPS is 362 and max FPS is 489, resulting in a 127 FPS variance. This is the widest variance in the dataset, suggesting less consistent frame pacing at lower resolutions.

Q: How does the RX 6800 XT compare to its nearest rival in raw benchmark score?

A: The RX 6800 XT has an average benchmark score of 48477, which is 1.5% higher than the NVIDIA RTX A1000 Mobile (47743) and 2.5% lower than the Intel Arc A550M (49737). This places it in the 85th percentile of all GPUs.

Q: Does the combo support high refresh rate gaming at 4K?

A: Yes, at 4K High settings, the combo averages 142 FPS, which is sufficient for 144Hz displays. At 4K Medium, it averages 161 FPS, and at 4K Low, it reaches 176 FPS, all of which exceed standard 60Hz and 120Hz refresh rates.

How This Combo Ranks

In the benchmark database for Roblox, this specific combination of the Intel Core i5-11400F and AMD Radeon RX 6800 XT ranks 1165 out of 3711 tested combos. This places it in the top 31.4% of all configurations, which is a solid position given that the CPU is a mid-range 11th Gen part while the GPU is a high-end RDNA 2 card. The ranking suggests that the GPU is doing most of the heavy lifting for this game, as the CPU's percentile is 71% among all processors, while the GPU's percentile is 85% among all graphics cards.

The combo's rank of 1165 out of 3711 indicates that there are many systems with faster CPUs that achieve higher frame rates in Roblox, particularly at 1080p where the CPU becomes more relevant. However, the measured FPS data shows that this combo still delivers extremely high frame rates, with even the worst case (4K Ultra) exceeding 115 FPS. The rank is likely pulled down by systems with newer or higher-end CPUs that can push 1080p Low beyond the 468 FPS mark seen here, as the i5-11400F's single-thread score of 868 in 3DMark and 2024 in Cinebench R23 are decent but not top-tier.

Relative to its nearest CPU rivals, the i5-11400F performs within 0.6% of the AMD EPYC 7H12 and Intel Core Ultra 7 164U, and within 0.4% of the Intel Core i5-12450H. This tight grouping suggests that the CPU's performance is well-balanced, and the combo's overall rank is more influenced by the GPU. The RX 6800 XT's nearest rivals include the RTX A1000 Mobile (+1.5%) and Arc A550M (-2.5%), which are all within a 3% delta, indicating that the GPU is competitive with its peers. For Roblox specifically, the combo rank of 1165 out of 3711 is respectable, and the data shows that it can handle the game at maximum settings with high frame rates at all tested resolutions.

CPU Role

The Intel Core i5-11400F is a 6-core, 12-thread processor from the Rocket Lake architecture, with a base clock of 2.60 GHz and a boost clock of 4.40 GHz. It has 12 MB of shared L3 cache and supports DDR4 memory in a dual-channel configuration, providing 51.2 GB/s of memory bandwidth. The CPU's percentile ranking is 71% among all processors, and its average benchmark score is 17177, which is nearly identical to its nearest rivals, including the AMD EPYC 7H12 (17120, +0.3%) and the Intel Core i5-12450H (17239, -0.4%).

In Roblox, the CPU's role is most pronounced at 1080p, where the frame rates are highest. The jump from 376 FPS at 1080p High to 251 FPS at 1440p High indicates that the CPU is capable of pushing the GPU to its limits at lower resolutions, but the GPU becomes the bottleneck as resolution increases. The 1080p Low result of 468 FPS is particularly telling, as it approaches the theoretical maximum that the CPU can feed to the GPU. This suggests that the i5-11400F's single-thread performance (868 in 3DMark single-thread, 2024 in Cinebench R23 single-core) is sufficient for Roblox's game logic and physics, which are typically single-threaded.

The CPU's multi-threaded capabilities are less relevant for Roblox, as the game does not scale well across many cores. However, the i5-11400F's 6 cores and 12 threads ensure that background tasks and the game's audio and networking threads do not cause stutters. The 65W TDP and 14nm process node are modest by modern standards, but they do not appear to limit performance in this title. The CPU's Cinebench R23 multi-core score of 14340 is strong for a 6-core part, but Roblox's frame rates are more dependent on the single-core score, which is why the 1080p results are so high.

The memory bandwidth of 51.2 GB/s is adequate for Roblox, as the game does not require high bandwidth. The dual-channel DDR4 configuration is standard for this platform, and the data shows no signs of memory bottlenecking, as the FPS scales predictably with resolution. The CPU's PCIe Gen 4 support (20 lanes) provides sufficient bandwidth for the RX 6800 XT, which uses a PCIe 4.0 x16 interface. Overall, the i5-11400F plays a supporting role in this combo, enabling the GPU to perform at its best at 1440p and 4K, while being the primary limiter at 1080p where frame rates exceed 400 FPS.

Measured FPS Breakdown

The measured FPS data for this combo covers four settings presets across three resolutions, providing a comprehensive view of performance. At 1920x1080, the Low preset delivers the highest average of 468 FPS, followed by Medium at 425 FPS (min 362, max 489), High at 376 FPS, and Ultra at 305 FPS. The spread from Low to Ultra is 163 FPS, which shows that Roblox's settings have a significant impact on performance at this resolution.

At 2560x1440, the same pattern holds but with lower absolute numbers. Low averages 312 FPS, Medium averages 284 FPS (min 241, max 327), High averages 251 FPS, and Ultra averages 204 FPS. The spread is 108 FPS, which is narrower than at 1080p, indicating that the GPU is starting to become more of a limiting factor.

At 3840x2160, the averages drop further. Low is 176 FPS, Medium is 161 FPS (min 136, max 185), High is 142 FPS, and Ultra is 115 FPS. The spread is 61 FPS, which is the smallest of the three resolutions, confirming that the GPU is the bottleneck at 4K. The Medium preset at 4K has the only complete min/max data for that resolution, showing a 49 FPS variance, which is the tightest of any setting, indicating more stable frame pacing at higher resolutions.

The data also shows that the difference between Low and Medium is consistent across resolutions: 43 FPS at 1080p, 28 FPS at 1440p, and 15 FPS at 4K. This suggests that Medium adds a moderate amount of visual quality for a relatively small performance cost, especially at higher resolutions. The jump from High to Ultra is more costly, with a 71 FPS drop at 1080p, 47 FPS at 1440p, and 27 FPS at 4K. These numbers show that Ultra is a significant step up in workload, but the RX 6800 XT still handles it comfortably in Roblox.