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 450 FPS, suitable for 144Hz+ monitors. At 1440p, all settings exceed 450 FPS. At 4K, all settings exceed 304 FPS.
The GeForce RTX 4090 is 1277% above the recommended GPU (GeForce GTX 560) for League of Legends. The Core i9-9990XE is 371% above the recommended CPU (Core i5-3330).
The GeForce RTX 4090 determines the performance ceiling at 1080p ultra, all 1440p settings, all 4k settings, executing at maximum capacity. The system is well balanced at 1080p (low/medium/high).
At 1440p ultra, the GeForce RTX 4090 sets the ceiling at about 345 FPS, while the Core i9-9990XE has headroom up to 450 FPS. In this scenario, the GPU limits the CPU potential by 23% (FPS gap: 105 FPS). Overall distribution: GPU limits 9/12 cells, CPU limits 0/12, balanced 3/12.
Your GeForce RTX 4090 is the limiting side in the heaviest mismatch. This means part of the Core i9-9990XE frame-generation potential remains unused in those settings.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | Balanced | Balanced | Balanced | GPU Limits CPU 7% |
| 1440p (2K QHD) | GPU Limits CPU 7% | GPU Limits CPU 13% | GPU Limits CPU 14% | GPU Limits CPU 23% |
| 4K (Ultra HD) | GPU Limits CPU 15% | GPU Limits CPU 14% | GPU Limits CPU 17% | GPU Limits CPU 23% |
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.
The displayed percentages are derived from FPS ceilings, not generic utilization heuristics.
| Resolution | Low | Medium | High | Ultra |
|---|---|---|---|---|
| 1080p (Full HD) | CPU8% - 27% <> GPU29% - 34% <> | CPU14% - 37% <> GPU29% - 36% <> | CPU14% - 37% <> GPU29% - 36% <> | CPU13% - 35% <> GPU31% - 37% <> |
| 1440p (2K QHD) | CPU10% - 22% <> GPU34% - 40% <> | CPU15% - 32% <> GPU33% - 42% <> | CPU15% - 32% <> GPU33% - 42% <> | CPU14% - 30% <> GPU35% - 43% <> |
| 4K (Ultra HD) | CPU10% - 22% <> GPU69% - 75% <> | CPU15% - 32% <> GPU73% - 75% <> | CPU15% - 32% <> GPU73% - 75% <> | CPU14% - 30% <> GPU74% - 77% <> |
The Core i9-9990XE + GeForce RTX 4090 pairing runs this title with CPU utilization between 8% and 37% and GPU utilization between 29% and 77%. Core i9-9990XE keeps significant headroom across presets, while GeForce RTX 4090 is utilized efficiently without persistent saturation. As resolution scales, average GPU load rises from 33% at 1080p to 74% at 4K, while CPU averages move from 24% to 22%.
The utilization pattern is relatively balanced. The GeForce RTX 4090 reaches 76% average at its highest-load preset, while the Core i9-9990XE peaks at 26% average, with no single component consistently acting as a hard bottleneck.
At 1080p, averages sit around CPU 24% and GPU 33%. At 1440p, that shifts to CPU 22% and GPU 38%, and at 4K it reaches CPU 22% and GPU 74%. This shows that GPU demand scales sharply with resolution while CPU load remains comparatively stable.
4K (Ultra HD) Ultra is the most balanced preset based on this dataset. It runs around CPU 22% (14-30%) and GPU 76% (74-77%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Core i9-9990XE remains stable for consistent frame delivery.
Current utilization does not show an urgent upgrade requirement for either component; the Core i9-9990XE and GeForce RTX 4090 remain reasonably matched for this title.
Understanding Hardware Utilization & Bottlenecks: These percentages represent how much of your component's maximum processing power is actively being used during gameplay. This is the key to identifying performance bottlenecks in any system.
Data generated by our Machine Learning engine trained on real-world benchmarks. Shows the approximate average utilization at each setting.
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 371% above and your GPU is 1277% above the recommended specs. Ultra settings at 1080p, or High at 1440p/4K.
+371%vsrecommended
+1277%vsrecommended
+1338%vsminimum
+6755%vsminimum
Yes, the Core i9-9990XE paired with the GeForce RTX 4090 can run League of Legends smoothly up to 4k achieving around 304 FPS at Ultra quality. Your GPU is 1277% above the recommended specs, and your CPU is 371% above the recommended requirements.
Price data is not currently available for this combination. In general, look for setups where the CPU and GPU are balanced — this ensures you're not overspending on one component that the other can't keep up with.
Your GeForce RTX 4090 is already a top-tier graphics card. While it's technically the limiting factor here (which means you are fully utilizing your GPU's visual horsepower exactly as intended), there is no meaningful upgrade path that would drastically improve your League of Legends performance right now. GPU fully utilized at: 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 Core i9-9990XE 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.
