As the world's most popular MOBA, League of Legends runs on a proprietary engine that has been updated for over a decade. Recently, Riot increased the minimum requirements to include AVX instruction support and dropped support for older OSs and DirectX 9. While still lightweight, modern team fights with complex particle effects can strain older integrated graphics. The game scales well with single-thread CPU performance, meaning even modern entry-level processors can deliver high frame rates.
Actual FPS may vary based on RAM speed, background processes, and other system factors
Performance Report
At 1080p, all quality settings exceed 429 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 369 FPS. At 4K, all settings exceed 234 FPS.
The GeForce RTX 4090 is 1277% above the recommended GPU (GeForce GTX 560) for League of Legends. The Ryzen Threadripper 3990X is 1147% above the recommended CPU (Core i5-3330).
The Ryzen Threadripper 3990X sets the FPS ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the GeForce RTX 4090 still has headroom.
Approximated average price on current market:
Combo price: $4499. At 1080p Ultra, this combo delivers 429 FPS, equivalent to 0.1 FPS per dollar.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p | 0.152 fps/$ | 0.125 fps/$ | 0.111 fps/$ | 0.095 fps/$ |
| 1440p | 0.130 fps/$ | 0.109 fps/$ | 0.095 fps/$ | 0.082 fps/$ |
| 4k | 0.094 fps/$ | 0.075 fps/$ | 0.065 fps/$ | 0.052 fps/$ |
* Table values represent FPS per Dollar (higher is better)
This section is based on estimated CPU/GPU FPS ceilings, not utilization percentages. Adjacent heavier settings are lightly stabilized to remove prediction jitter that would otherwise create impossible reversals.
At 1080p low, the Ryzen Threadripper 3990X sets the ceiling at about 692 FPS, while the GeForce RTX 4090 could reach 1025 FPS. In this scenario, the CPU limits the GPU potential by 32% (FPS gap: 333 FPS). Overall distribution: CPU limits 12/12 cells, GPU limits 0/12, balanced 0/12.
Your Ryzen Threadripper 3990X is the limiting side in the heaviest mismatch. This means part of the GeForce RTX 4090 rendering potential remains unused in those settings.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU Limits GPU 32% | CPU Limits GPU 32% | CPU Limits GPU 32% | CPU Limits GPU 32% |
| 1440p (2K QHD) | CPU Limits GPU 31% | CPU Limits GPU 31% | CPU Limits GPU 30% | CPU Limits GPU 29% |
| 4K (Ultra HD) | CPU Limits GPU 27% | CPU Limits GPU 27% | CPU Limits GPU 27% | CPU Limits GPU 27% |
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 and then monotonic-smoothed across heavier presets and resolutions, 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 1147% above and your GPU is 1277% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+1147%vsrecommended
+1277%vsrecommended
+3708%vsminimum
+6755%vsminimum
Yes, the Ryzen Threadripper 3990X paired with the GeForce RTX 4090 can run League of Legends smoothly up to 4k achieving around 234 FPS at Ultra quality. Your GPU is 1277% above the recommended specs, and your CPU is 1147% above the recommended requirements.
This CPU + GPU combo costs approximately $4499 ($2850 CPU + $1649 GPU). Your Ryzen Threadripper 3990X provides phenomenal top-tier performance but at a premium enthusiast price. Since you are essentially at the ceiling of current hardware capabilities, there are no meaningful performance upgrades available. However, if you wanted a more cost-effective build that still delivers a great experience, you could theoretically step down to a high-end processor with a significantly better value rating. For example, the Ryzen Threadripper 9980X is a great upgrade option for around $4999 (Rank #868 for value).
Your Ryzen Threadripper 3990X is already an incredibly powerful processor. While it's technically the first component to hit its limit (which is completely normal in state-of-the-art builds), there is no meaningful upgrade path that would drastically improve your League of Legends performance right now. CPU fully utilized at: 1080p low, 1080p medium, 1080p high, 1080p ultra, 1440p low, 1440p medium, 1440p high, 1440p ultra, 4k low, 4k medium, 4k high, 4k ultra.
League of Legends does not currently support Frame Generation technologies like DLSS 3 or FSR 3. Your performance is based entirely on native rendering. If the game adds support in a future update, newer GPUs will benefit the most.
League of Legends requires at minimum a Core i3-530 (CPU) and GeForce 9600 GT (GPU) with 2 GB RAM and 16 GB storage. For the recommended experience, you need a Core i5-3330 and GeForce GTX 560 with 4 GB RAM. Your Ryzen Threadripper 3990X and GeForce RTX 4090 both exceed the recommended specs, so you're well-positioned for a great experience.
These League of Legends 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.
