Roblox

Roblox is not a typical stress test for an NVIDIA GeForce RTX 4090, and the data for this AMD Ryzen 7 5800X3D pairing reflects that unusual dynamic. The measured frame rates are extraordinarily high across all resolutions, but the scaling patterns reveal a system that is heavily constrained by the CPU in many scenarios, with the GPU only becoming a significant factor at 4K with the highest settings. This combination of a top-tier consumer GPU with a high-cache gaming CPU produces a benchmark profile that tells a clear story about where the bottleneck lies.

Resolution Scaling

The frame rate drop from 1080p to 4K is dramatic but uneven, indicating a shift in the primary limiter. At 1080p with Low settings, the system produces an average of 712.1 FPS. Moving to 1440p drops that to 475.4 FPS, and at 4K it falls to 269.9 FPS. This represents a 62% reduction from 1080p to 4K, which is a substantial decline, but it is not as steep as what a pure GPU-bound workload would typically show. The fact that the 4090 is capable of over 200 FPS at 4K in this title suggests that the game engine itself is not demanding enough to fully saturate the GPU at lower resolutions.

The scaling pattern changes when you look at Ultra settings. Here, the 1080p result is 465.3 FPS, which drops to 312.6 FPS at 1440p and then to 175.2 FPS at 4K. The percentage drop from 1080p to 4K on Ultra is about 62% as well, but the absolute numbers are much lower. This indicates that the Ultra preset introduces enough graphical load to start engaging the GPU more meaningfully, but even then, the RTX 4090 is not being pushed to its limits. The data suggests that at 1080p and 1440p, the Ryzen 7 5800X3D is the limiting factor, as the FPS differences between settings are relatively small compared to the massive headroom the GPU has. At 4K Ultra, the GPU begins to take on a more prominent role, but the overall frame rates remain high enough to suggest this is still far from a worst-case scenario for the hardware.

The most telling insight is the gap between Low and Ultra at each resolution. At 1080p, the difference is 246.8 FPS (712.1 vs 465.3). At 4K, the difference narrows to 94.7 FPS (269.9 vs 175.2). This compression of the settings gap as resolution increases is a classic sign of a CPU bottleneck at lower resolutions and a GPU bottleneck at higher resolutions. The data shows that players are far more likely to be limited by the processor than the graphics card in this specific combination.

FAQ

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

A: The highest average is 712.1 FPS, achieved at 1920x1080 resolution with Low settings. This is over 2.4 times the performance of the 4K Ultra result.

Q: How much faster is the Ryzen 7 5800X3D compared to its nearest rival in synthetic benchmarks?

A: According to the average benchmark score, the Ryzen 7 5800X3D scores 26574, which is 0.2% higher than the AMD Ryzen 5 7600 and 0.1% higher than the Intel Core i9-11900K. Its performance is effectively tied with these processors in general compute tasks.

Q: What is the GPU's percentile ranking among all GPUs?

A: The NVIDIA GeForce RTX 4090 is in the 91st percentile for all GPUs, based on its average benchmark score of 66473. This places it well above the majority of graphics cards.

Q: Is the RTX 4090's performance in Roblox consistent with its high benchmark scores?

A: No. While the GPU scores in the 91st percentile overall, the measured FPS in Roblox shows it is not the primary bottleneck at 1080p. The data indicates that the CPU is limiting performance in many scenarios, as the frame rates do not scale with settings as much as they would if the GPU were the constraint.

Q: What is the difference in average FPS between Medium and High settings at 1440p?

A: At 2560x1440, the Medium preset averages 432.1 FPS, while the High preset averages 384.5 FPS. This is a difference of 47.6 FPS, or roughly an 11% performance reduction for the higher quality setting.

Q: How does the 4K Ultra performance compare to the 1080p Low performance?

A: The 4K Ultra result of 175.2 FPS is significantly lower than the 1080p Low result of 712.1 FPS. The 4K Ultra setting requires 4.1 times more rendering work per frame, which explains the substantial drop in frame rate.

GPU Role

The NVIDIA GeForce RTX 4090 is a massive piece of hardware with 24 GB of GDDR6X memory on a 384-bit bus, providing 1.01 TB/s of bandwidth. Its base clock is 2235 MHz with a boost clock of 2520 MHz. In most games, this would be the dominant component, but the Roblox data shows it is frequently underutilized. The benchmark results show that the GPU is not the limiting factor until you reach 4K with the Ultra preset. The fact that the 4090's PassMark G3D score is 38194, placing it in the 91st percentile, does not translate to proportional gains in this title.

The 24 GB VRAM capacity is far beyond what Roblox requires, even at 4K Ultra. The data does not show any memory-related performance cliffs, which suggests that the game is not allocating a significant portion of the available VRAM. The boost clock of 2520 MHz is high, but the game's engine seems to be limiting the draw calls and geometry processing in a way that prevents the GPU from reaching its full potential. The 16384 shading units and 512 tensor cores are effectively idle in many of the tested scenarios. The GPU's role becomes more apparent when comparing the Low and Ultra presets at 4K, where the 94.7 FPS gap is the largest across all resolutions, indicating that the graphics card is finally being asked to do more work. However, even at 4K Ultra with 175.2 FPS, the RTX 4090 is still not being pushed to its limits, as this is a frame rate that many lower-tier GPUs would struggle to achieve in other titles.

Settings Recommendations

The measured data shows that the Low preset offers the highest frame rates at every resolution, but the differences between Low and Medium are small enough that the visual upgrade is likely worth the performance cost. At 1080p, Low averages 712.1 FPS, while Medium averages 647.1 FPS. This is a mere 9% reduction, which is imperceptible on most high-refresh monitors. The step from Medium to High is slightly larger, dropping to 572.6 FPS, which is a 12% reduction from Medium. The Ultra preset is the outlier, costing 28% of the Medium performance at 1080p (465.3 FPS vs 647.1 FPS), which may not be justified for the visual gains in a game like Roblox.

At 1440p, the pattern holds. Medium provides 432.1 FPS, which is still exceptionally high and likely exceeds the refresh rate of most monitors. The Ultra preset drops to 312.6 FPS, which is still playable but represents a significant reduction from the other presets. At 4K, the choice becomes more critical. Medium at 245.9 FPS and High at 217.5 FPS are both excellent, but Ultra drops to 175.2 FPS. Given that the RTX 4090 is capable of these high frame rates, the best experience per the measured rows is likely the Medium preset at 1080p or 1440p, as it offers a good balance of quality and performance without the steep penalty of Ultra. For 4K users, Medium is the recommended starting point, as it maintains a high average frame rate while still providing a solid visual experience.

Measured FPS Breakdown

At 1920x1080, the data shows a clear hierarchy. Low settings produce 712.1 FPS, Medium produces 647.1 FPS, High produces 572.6 FPS, and Ultra produces 465.3 FPS. The performance gap between Low and Ultra is 246.8 FPS, but the largest single step is from High to Ultra, which is a 107.3 FPS drop. This suggests that the Ultra preset introduces a significant rendering overhead that the CPU or GPU must handle.

At 2560x1440, the results are lower but still impressive. Low averages 475.4 FPS, Medium averages 432.1 FPS, High averages 384.5 FPS, and Ultra averages 312.6 FPS. The drop from Low to Ultra is 162.8 FPS. The relative performance difference between Low and Medium is 9.1%, which is similar to the 1080p result, indicating a consistent CPU limit.

At 3840x2160, the frame rates become more moderate. Low averages 269.9 FPS, Medium averages 245.9 FPS, High averages 217.5 FPS, and Ultra averages 175.2 FPS. The gap between Low and Ultra is 94.7 FPS, which is the smallest absolute gap across all resolutions. This indicates that the GPU is starting to become the limiting factor at 4K, as the settings changes have a more pronounced effect on the frame rate. The data shows that this combo is capable of delivering a 4K Ultra experience at 175.2 FPS, which is well above the 60 FPS standard for most games.

CPU Role

The AMD Ryzen 7 5800X3D is an 8-core, 16-thread processor based on the Zen 3 architecture, with a base clock of 3.40 GHz and a boost clock of 4.50 GHz. Its most notable feature is the 96 MB of shared L3 cache, which is a key factor in gaming performance. The benchmark data shows that this CPU is the primary bottleneck in Roblox at 1080p and 1440p. The measured frame rates are extremely high, but they do not scale as much as they would if the GPU were the limiting factor. The 3DMark 16-thread score of 7299 and the single-thread score of 884 indicate that the CPU has strong multi-threaded and single-threaded performance, but the game may not be fully utilizing all 16 threads.

The Cinebench R23 multi-core score of 24063 and single-core score of 3397 place it in a competitive position, with the average benchmark score of 26574 putting it in the 83rd percentile of all CPUs. Its nearest rivals include the AMD EPYC 8024P with a delta of 0.1% and the Intel Core i9-11900K with a delta of 0.1%. This means that in synthetic benchmarks, the 5800X3D is essentially tied with these processors. However, the large L3 cache is designed to improve gaming performance specifically, and the Roblox data suggests that it helps maintain high frame rates even when the graphics settings are lowered.

The fact that the 1080p Low result of 712.1 FPS is so close to the 1080p Medium result of 647.1 FPS suggests that the CPU is hitting a limit at around 700 FPS. This is not a limitation of the processor's raw compute power, but rather a limitation of the game engine's ability to issue draw calls and update game logic. The 5800X3D's boost clock of 4.50 GHz is sufficient to keep up with the game's demands, but the data shows that the CPU is the ceiling for performance in this title. For players seeking the absolute highest frame rates, this CPU is well-matched with the RTX 4090, but the GPU will often be waiting for the processor to catch up.