Roblox

Resolution Scaling

The measured FPS data for Roblox with the AMD Ryzen 7 5800XT and NVIDIA GeForce RTX 4080 SUPER reveals a pattern that is almost entirely GPU-bound at higher resolutions, with the CPU becoming a significant factor only at 1080p. The frame rate deltas from 1080p to 4K are substantial. At Low settings, the average FPS drops from 640 at 1920x1080 to 241 at 3840x2160, a reduction of 399 FPS (or roughly 62%). At Ultra settings, the drop is from 417 at 1920x1080 to 158 at 3840x2160, a reduction of 259 FPS (or about 62%).

This consistent proportional drop across all settings suggests that the RTX 4080 SUPER's rendering workload scales predictably with pixel count. The 4K results, while lower, remain exceptionally high for a game like Roblox; even the lowest 4K average of 158 FPS at Ultra is far beyond what most displays can refresh. The scaling behavior indicates that at 4K, the GPU is the primary limiting component, as the CPU has ample headroom to feed frames. Moving from 2560x1440 to 3840x2160 at High settings, the average FPS falls from 343 to 194, a 149 FPS drop (43%), confirming that the GPU's fill rate and bandwidth are being taxed by the increased resolution.

However, the scaling from 1080p to 1440p tells a slightly different story. At Low settings, the FPS drops from 640 at 1920x1080 to 427 at 2560x1440, a 213 FPS decline. At High settings, the drop is from 515 to 343, a 172 FPS decline. These absolute drops are larger than the ones seen between 1440p and 4K, which suggests that the CPU is starting to become a bottleneck at 1080p. The Ryzen 7 5800XT, with its 8 cores and 16 threads, is capable, but the extremely high frame rates at 1080p (e.g., 640 FPS on Low) approach the limits of what the CPU can process for game logic and draw calls. The data indicates that at 1080p, the scaling is less efficient than at higher resolutions because the CPU is nearing its maximum throughput, whereas at 4K, the GPU is clearly the limiting factor.

Settings Recommendations

Based on the measured rows, the best experience hinges on the target resolution and refresh rate. For 4K displays, the High preset at an average of 194 FPS is the most balanced choice. It offers a significant improvement over the Ultra preset's 158 FPS (a 36 FPS gain) while maintaining visual fidelity far above Medium (220 FPS) and Low (241 FPS). The data shows that the Ultra preset's cost in performance (from 194 to 158 FPS) is steep for what is likely a marginal visual gain in Roblox's stylized graphics. The Medium preset at 4K, with 220 FPS average and a minimum of 187 FPS, is also a strong contender, especially for users who prioritize smoothness over maximum detail.

At 2560x1440, the High preset delivers an average of 343 FPS, which is excellent for high-refresh-rate monitors. The Ultra preset drops to 279 FPS, still very high, but the jump from High to Ultra costs 64 FPS. Given that the Medium preset at 1440p yields 388 FPS, the High preset appears to be the sweet spot, offering a balance between visual quality and the raw speed needed to push a 240Hz or 360Hz panel. For 1920x1080, the High preset's 515 FPS average is already so high that it will exceed the refresh rate of virtually all monitors. The Ultra preset at 417 FPS is also more than sufficient. The data suggests that Medium (582 FPS) and Low (640 FPS) at 1080p are only useful for competitive scenarios where every frame counts, but the visual degradation is likely not worth the performance gain for most players.

The clear verdict from the data is to avoid the Ultra preset at all resolutions. The performance cost is consistent (e.g., 417 to 515 FPS at 1080p, 279 to 343 at 1440p, 158 to 194 at 4K) and does not align with the principle of maximizing frame rate for a given visual target. High settings provide the best measured balance, offering the highest average FPS that still maintains a substantial visual upgrade over Medium.

GPU Role

The NVIDIA GeForce RTX 4080 SUPER plays a dominant role in this game's performance, particularly at higher resolutions. The GPU's 16 GB of GDDR6X memory on a 256-bit bus, delivering 736.3 GB/s of bandwidth, is more than sufficient for Roblox, which is not a memory-intensive title. The benchmark results show that the GPU's compute capabilities are immense; its Passmark G3D score is 34245, and it achieves a 3DMark Steel Nomad DX12 score of 6600. These high scores correlate with the GPU's ability to handle the high frame rates observed in Roblox, even at 4K.

The GPU's clock speeds, with a base of 2295 MHz and a boost of 2550 MHz, are high, and they contribute to its exceptional rasterization performance. The data indicates that at 4K, the RTX 4080 SUPER is the bottleneck, as the average FPS at High settings (194) is far below what the CPU could theoretically support. The GPU's pixel rate of 285.6 GPixel/s and texture rate of 816.0 GTexel/s are key metrics that explain its ability to fill those 4K frames quickly. In contrast, at 1080p, the GPU is often idle waiting for the CPU, evidenced by the fact that the FPS at Low (640) is almost 3.3 times higher than at 4K Low (241), but still not as high as the raw compute potential suggests, indicating CPU limitations.

The RTX 4080 SUPER's percentile rank of 86 among all GPUs and its average benchmark score of 54209 place it in the top tier of hardware. Its nearest rivals, such as the RTX 4080 (with a deltaPct of -0.1%), show that it is virtually tied in raw performance. This means that in Roblox, the 4080 SUPER's role is to provide an almost absurd level of headroom; it is not the component that will limit the experience in most scenarios, except when pushing 4K Ultra.

Measured FPS Breakdown

The measured FPS data provides a comprehensive view of performance across three resolutions and four settings presets.

1920x1080: At Low settings, the average FPS is 640. Medium settings yield an average of 582 FPS, with a minimum of 495 FPS and a maximum of 669 FPS. High settings produce an average of 515 FPS. Ultra settings result in an average of 417 FPS. The data shows a clear and consistent performance hierarchy, with a 223 FPS difference between Low and Ultra.

2560x1440: Low settings average 427 FPS. Medium settings average 388 FPS, with a minimum of 330 FPS and a maximum of 447 FPS. High settings average 343 FPS. Ultra settings average 279 FPS. The performance gap between Low and Ultra at this resolution is 148 FPS.

3840x2160: Low settings average 241 FPS. Medium settings average 220 FPS, with a minimum of 187 FPS and a maximum of 253 FPS. High settings average 194 FPS. Ultra settings average 158 FPS. The gap between Low and Ultra here is 83 FPS, which is the smallest absolute difference across all resolutions, highlighting the GPU's increased load.

The Medium preset is the only one with recorded minimum and maximum FPS values. At 1080p, the variation is from 495 to 669 FPS, a range of 174 FPS. At 1440p, the range is from 330 to 447 FPS, a range of 117 FPS. At 4K, the range is from 187 to 253 FPS, a range of 66 FPS. This decreasing variance as resolution increases is a classic sign of the GPU becoming the primary performance limiter, reducing the impact of CPU-driven frame time spikes.

FAQ

Q: Can this system run Roblox at 4K with high refresh rates?

A: Yes. The data shows an average of 194 FPS at 3840x2160 with High settings, and even 158 FPS at Ultra. This is well above the 60Hz standard and sufficient for many high-refresh-rate 4K displays.

Q: What is the best settings preset for competitive play at 1080p?

A: For maximum frame rate, the Low preset at 1920x1080 yields an average of 640 FPS. However, the High preset at 515 FPS is a better balance, providing significantly better visuals while still exceeding the refresh rate of any consumer monitor.

Q: How does the RTX 4080 SUPER compare to its closest rival in terms of overall performance?

A: The RTX 4080 SUPER has an average benchmark score of 54209, while its nearest rival, the NVIDIA GeForce RTX 4080, has an average score of 54247. This represents a deltaPct of -0.1%, meaning they are essentially identical in performance.

Q: Is the Ryzen 7 5800XT a bottleneck for the RTX 4080 SUPER in this game?

A: At 1080p, yes. The frame rates are very high (e.g., 640 FPS on Low), and the scaling from 1080p to 1440p suggests the CPU is reaching its limit. At 4K, the GPU is the clear bottleneck, as the FPS drops are more proportional to resolution scaling.

Q: What is the frame time consistency like at 1440p on Medium settings?

A: At 2560x1440 with Medium settings, the average FPS is 388, with a minimum of 330 and a maximum of 447. This indicates a stable frame delivery with a variance of 117 FPS, which is typical for a GPU-bound scenario.

Q: How much performance is lost when moving from High to Ultra settings at 1440p?

A: At 2560x1440, High settings average 343 FPS, while Ultra settings average 279 FPS. This is a performance drop of 64 FPS, or approximately 19%.

CPU Role

The AMD Ryzen 7 5800XT, with its 8 cores and 16 threads based on the Zen 3 architecture, has a significant role in this game, particularly at lower resolutions. The CPU's high single-thread performance, evidenced by a 3DMark single-thread score of 959 and a Cinebench R23 single-core score of 3359, is critical for Roblox, which is often limited by game logic and draw call processing on a few threads. The CPU's boost clock of 4.80 GHz and base clock of 3.80 GHz are high, contributing to its ability to handle the massive frame rates seen at 1080p.

The benchmark results show the processor is a strong all-around performer. Its Cinebench R23 multicore score of 23794 and Passmark multithread score of 28053 indicate that it has substantial headroom for multi-threaded tasks, but Roblox's engine likely does not leverage all 16 threads effectively. The data from the measured FPS suggests that at 1920x1080, the CPU is the limiting factor. The fact that the FPS at Low (640) is not significantly higher than at High (515) — a 125 FPS difference — despite the GPU having far less work to do, points to the CPU being unable to issue draw calls fast enough.

The CPU's percentile rank of 81 among all CPUs and its average benchmark score of 29879 place it in a strong position. Its nearest rival, the AMD Ryzen 7 7840H, has an average score of 29868 (deltaPct of 0%), showing similar overall performance. However, in Roblox, the 5800XT's strength is its single-core speed. The 3DMark 2-thread score of 1879 and 4-thread score of 3603 are particularly relevant, as they show the CPU's ability to handle the few critical threads that a game like Roblox depends on. While the GPU is the star of the show at 4K, the CPU's performance is the reason why 1080p frame rates can exceed 500 FPS, making it a balanced partner for the RTX 4080 SUPER in this specific title.