Scales from mobile devices to high-end PCs. The engine is lightweight and typically capped at 60 FPS. It requires a stable internet connection for asset streaming and a DX10 compatible GPU.
This game has a built-in FPS cap of 60 FPS
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, all quality settings exceed 269 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 224 FPS. At 4K, all settings exceed 210 FPS.
The GeForce RTX 4090 is 843% above the recommended GPU (GeForce GTX 660) for Roblox. The Ryzen 5 8400F is 1021% above the recommended CPU (Core 2 Duo).
Roblox supports: AFMF. This game does not have native DLSS 3 or FSR 3 Frame Generation support. AFMF is AMD-exclusive and not compatible with GeForce RTX 4090.
The Ryzen 5 8400F sets the FPS ceiling at all 1440p settings, while the GeForce RTX 4090 still has headroom. The FPS ceiling is closely matched at all 1080p settings, all 4k settings.
Approximated average price on current market:
Combo price: $1704. At 1080p Ultra, this combo delivers 269 FPS, equivalent to 0.16 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.250 fps/$ | 0.224 fps/$ | 0.202 fps/$ | 0.158 fps/$ |
| 1440p | 0.181 fps/$ | 0.167 fps/$ | 0.166 fps/$ | 0.131 fps/$ |
| 4k | 0.144 fps/$ | 0.147 fps/$ | 0.157 fps/$ | 0.123 fps/$ |
* Table values represent FPS per Dollar (higher is better)
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages.
At 1440p medium, the Ryzen 5 8400F sets the ceiling at about 291 FPS, while the GeForce RTX 4090 could reach 322 FPS. In this scenario, the CPU limits the GPU potential by 10% (FPS gap: 31 FPS). Overall distribution: CPU limits 4/12 cells, GPU limits 0/12, balanced 8/12.
The Ryzen 5 8400F and GeForce RTX 4090 stay close in effective frame-generation ceiling across most presets, so neither side consistently suppresses the other by a large margin.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | Balanced | Balanced | Balanced | Balanced |
| 1440p (2K QHD) | CPU Limits GPU 8% | CPU Limits GPU 10% | CPU Limits GPU 7% | CPU Limits GPU 8% |
| 4K (Ultra HD) | Balanced | Balanced | Balanced | Balanced |
We estimate the maximum FPS the processor can sustain and the maximum FPS the graphics card can sustain in each setting, then compare those limits directly.
Limit Factor formula: (stronger - weaker) / stronger. Example: if CPU ceiling is 200 FPS and GPU ceiling is 140 FPS, then GPU limits CPU by 30%.
CPU Limits GPU means the processor ceiling is lower. GPU Limits CPU means the graphics ceiling is lower. Balanced means the FPS ceilings are close enough that the gap is negligible.
A component can still be the FPS limiter without reaching 100% utilization. The displayed percentages are derived from FPS ceilings, not generic utilization heuristics.
See how your processor and graphics card compare against the game official minimum and recommended system specs. The placement of your hardware is calculated using relative synthetic performance scores to help you gauge overall playability.
Your CPU is 1021% above and your GPU is 843% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+1021%vsrecommended
+843%vsrecommended
+718%vsminimum
+2422%vsminimum
Yes, the Ryzen 5 8400F paired with the GeForce RTX 4090 can run Roblox smoothly up to 4k achieving around 210 FPS at Ultra quality. Your GPU is 843% above the recommended specs, and your CPU is 1021% above the recommended requirements.
This CPU + GPU combo costs approximately $1704 ($55 CPU (Rank #6 Value) + $1649 GPU (Rank #77 Value)). Your build is already very cost-efficient, but if you want even more FPS, the next good option is upgrading the CPU. For example, the Ryzen 9 9950X is a great upgrade option for around $649 (Rank #5 for value).
For Roblox, upgrading the CPU would have the biggest impact on performance. The Ryzen 5 8400F is currently the limiting factor — the GeForce RTX 4090 has extra headroom that a faster processor could take advantage of. This is especially noticeable at 1080p where CPU performance matters more. CPU-limited at: 1440p high, 1440p low, 1440p medium, 1440p ultra.
Roblox currently only supports AFMF (AMD Fluid Motion Frames) for frame generation, which is an AMD-exclusive technology. Because you are using an NVIDIA GPU, you cannot use Frame Generation for this specific game.
Roblox requires at minimum a Celeron D (CPU) and GeForce 6600 (GPU) with 1 GB RAM and 20 MB storage. For the recommended experience, you need a Core 2 Duo and GeForce GTX 660 with 4 GB RAM. Your Ryzen 5 8400F and GeForce RTX 4090 both exceed the recommended specs, so you're well-positioned for a great experience.
These Roblox FPS results are not arbitrary numbers. They come from calculations informed by thousands of real gaming benchmarks, and the typical accuracy range is around 10% to 15%. That makes them far more useful than generic FPS calculators that simply invent values without a benchmark foundation. Actual in-game performance can still vary with drivers, updates, RAM configuration, cooling, and the exact scene being rendered.
Performance estimates are based on synthetic benchmarks and hardware capabilities.
Results may vary based on drivers, OS, and background processes.
