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 92 FPS. At 1440p, all settings exceed 92 FPS. At 4K, all settings exceed 92 FPS.
The GeForce RTX 4090 is 1277% above the recommended GPU (GeForce GTX 560) for League of Legends. The Pentium Gold G5420 is 42% below recommended, but 76% above minimum.
The Pentium Gold G5420 determines the performance ceiling at all 1080p settings, all 1440p settings, all 4k settings, while the GPU has headroom.
At 1080p low, the Pentium Gold G5420 sets the ceiling at about 92 FPS, while the GeForce RTX 4090 could reach 700 FPS. In this scenario, the CPU limits the GPU potential by 87% (FPS gap: 608 FPS). Overall distribution: CPU limits 12/12 cells, GPU limits 0/12, balanced 0/12.
Your Pentium Gold G5420 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 87% | CPU Limits GPU 84% | CPU Limits GPU 81% | CPU Limits GPU 78% |
| 1440p (2K QHD) | CPU Limits GPU 86% | CPU Limits GPU 82% | CPU Limits GPU 79% | CPU Limits GPU 73% |
| 4K (Ultra HD) | CPU Limits GPU 80% | CPU Limits GPU 76% | CPU Limits GPU 70% | CPU Limits GPU 61% |
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) | CPU26% - 52% <> GPU38% - 42% <> | CPU28% - 61% <> GPU40% - 45% <> | CPU28% - 61% <> GPU40% - 45% <> | CPU25% - 58% <> GPU41% - 48% <> |
| 1440p (2K QHD) | CPU25% - 52% <> GPU43% - 50% <> | CPU28% - 59% <> GPU45% - 53% <> | CPU28% - 59% <> GPU45% - 53% <> | CPU25% - 56% <> GPU46% - 56% <> |
| 4K (Ultra HD) | CPU25% - 52% <> GPU67% - 68% <> | CPU28% - 58% <> GPU70% - 72% <> | CPU28% - 58% <> GPU70% - 72% <> | CPU25% - 56% <> GPU72% - 75% <> |
The Pentium Gold G5420 + GeForce RTX 4090 pairing runs this title with CPU utilization between 25% and 61% and GPU utilization between 38% and 75%. Pentium Gold G5420 keeps significant headroom across presets, while GeForce RTX 4090 is utilized efficiently without persistent saturation. As resolution scales, average GPU load rises from 42% at 1080p to 71% at 4K, while CPU averages move from 42% to 41%.
The utilization pattern is relatively balanced. The GeForce RTX 4090 reaches 74% average at its highest-load preset, while the Pentium Gold G5420 peaks at 44% average, with no single component consistently acting as a hard bottleneck.
At 1080p, averages sit around CPU 42% and GPU 42%. At 1440p, that shifts to CPU 42% and GPU 49%, and at 4K it reaches CPU 41% and GPU 71%. 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 40% (25-56%) and GPU 74% (72-75%), which keeps GeForce RTX 4090 well utilized without constant max-out behavior while Pentium Gold G5420 remains stable for consistent frame delivery.
Current utilization does not show an urgent upgrade requirement for either component; the Pentium Gold G5420 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 42% below recommended and your GPU is 1277% below recommended, but both meet minimum specs. Playable at Low/Medium settings, 1080p or below.
-42%vsrecommended
+1277%vsrecommended
+76%vsminimum
+6755%vsminimum
Yes, the Pentium Gold G5420 paired with the GeForce RTX 4090 can run League of Legends smoothly up to 4k achieving around 92 FPS at Ultra quality. Your GPU is 1277% above the recommended specs, and your CPU is 42% below 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.
For League of Legends, upgrading the CPU would have the biggest impact on performance. The Pentium Gold G5420 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: 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 setup meets the minimum requirements but falls short of the recommended specs. You may need to lower some settings for smooth performance.
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.
