LoL teamfight FPS on integrated graphics: check for one RAM stick

Part of our guide on fix warmup FPS drops

Check your RAM slots first to find the real cause of LoL teamfight FPS drops on integrated graphics before wasting time on settings.

How to read 'Slots used' in Task Manager and what 1 of 2 means for an integrated GPU

Open Task Manager and switch to the Performance tab, then Memory section. Look for the 'Slots used' line at the bottom right.

If it says '1 of 2', your laptop has a single RAM stick installed, running in single-channel mode.

Integrated GPUs rely heavily on RAM bandwidth. Single-channel cuts this bandwidth roughly in half, starving the GPU and causing large FPS drops, especially in teamfights where the GPU demands spike.

No in-game setting can compensate for this bandwidth limit because it is a hardware bottleneck. If that sounds like your situation, read up on reducing frame time stutter next.

Adding a second RAM stick turns on dual-channel mode, doubling bandwidth and boosting FPS noticeably in teamfights.

If you see '1 of 2' slots used but your laptop only has one physical slot, some models use single-channel because they have one stick soldered and no slot for expansion.

Check your system specs online by model number to confirm if only one memory module is present physically. This explains why no second stick appears despite '2 of 2' support. There is more on fortnite low end pc settings in a separate guide.

A simple test is to temporarily remove the RAM stick (if removable) and boot to see if it fails or shows zero slots used, confirming the number of physical slots.

Why single-channel cuts iGPU bandwidth roughly in half, and the FPS difference to expect in League specifically

Integrated graphics share system RAM for textures, shaders, and framebuffers. Bandwidth is the data transfer speed between RAM and GPU.

Single-channel RAM operates on a single 64-bit channel, while dual-channel doubles this to 128-bit, effectively doubling bandwidth. We go through adjusting display settings for lag step by step elsewhere on the site.

League of Legends teamfights generate intense particle effects, spell animations, and multiple character models, increasing GPU memory demand.

On single-channel RAM, expect teamfight FPS to drop by 30-50%, with stuttering and frame time spikes common.

Dual-channel RAM smooths these spikes, often doubling teamfight FPS compared to single-channel setups on the same hardware. It helps to understand pubg stutters right after landing in hot drops before going further.

For example, a laptop with 8GB DDR4-2400 single-channel RAM has roughly 19.2 GB/s bandwidth, while dual-channel doubles this to about 38.4 GB/s.

In practical terms, single-channel users might see teamfight FPS drop from 90 to 50-60 FPS, with frequent stutters.

After adding a matched second stick and enabling dual-channel, FPS can rise back to 85-95, smoothing gameplay. We cover fixing online match lag on ps5 in its own article.

This improvement is more visible in teamfights than in lane or jungle farming, where GPU load is lower.

What to do if the laptop has two sticks already: watch CPU clock and GPU usage during the fight to tell throttling from a single-thread CPU limit

If Task Manager shows 'Slots used 2 of 2', your RAM bandwidth is likely not the bottleneck.

Open Performance tab in Task Manager or a monitoring tool like HWMonitor to watch CPU clock speeds and GPU use during teamfights. Before you commit to anything, it is worth looking at packet loss every few minutes rainbow six siege.

If CPU clock drops below base frequency right when particles appear, the CPU is throttling due to heat, power limits, or thermal management.

If CPU clock stays stable but GPU load is below 100%, the CPU may be maxing out a single thread, creating a CPU-bound FPS limit.

Identifying throttling versus CPU limits guides the next tweaks: cooling, power plan, or lowering CPU-heavy settings.

If throttling is suspected, use HWInfo or similar tools to monitor CPU temperatures simultaneously.

Temperatures above 85°C often trigger CPU clock throttling to prevent overheating.

In this case, improving cooling with a laptop cooler pad or cleaning fans can keep clocks stable and avoid FPS dips.

If CPU clocks stay stable but GPU usage is low, the CPU likely hits a single-thread limit, common in LoL due to its game engine design.

Lowering CPU-heavy effects or using in-game frame cap helps reduce load on the main thread, improving FPS.

1. Run a teamfight or replay and keep Task Manager open on Performance tab.
2. Observe CPU clock speeds: look for sharp drops during fights.
3. Check GPU usage: low GPU load with low FPS indicates CPU bottleneck.
4. If clock drops, test cooling or power settings.
5. If stable clock but low GPU use, lower in-game CPU-heavy effects.

Which League settings actually reduce teamfight CPU work (particle effects, shadows, character inking, frame cap) and which are placebo

Particle effects and shadows are the main CPU and GPU load drivers in teamfights. Turn these down first to cut CPU draw.

Character inking (the outlines) also costs CPU. Set it to low or off for a small FPS gain.

Frame cap affects CPU by limiting processing load. Cap your FPS to your display refresh rate or a stable number to reduce CPU spikes.

Settings like texture quality and character quality mostly affect GPU but have little impact on CPU during teamfights.

Anti-aliasing and post-processing rarely change CPU load enough to affect teamfight FPS on low-end laptops.

Also try disabling animations like recall effects or minimap animations, which add minor CPU load in teamfights.

Turning off character inking sometimes improves clarity, which can help reaction times even if FPS gains are small.

Setting frame cap too low (under 30 FPS) causes gameplay input lag and should be avoided.

A good balance is capping just above your monitor’s refresh rate to maintain smoothness while limiting CPU spikes.

• Turn down particles to low: biggest CPU work cut
• Set shadows to low or off: significant CPU relief
• Lower character inking: small FPS boost
• Enable frame cap: smooth out CPU spikes in fights
• Ignore texture quality for CPU issues
• Anti-aliasing has minor CPU effect

Whether the laptop is soldered – how to check before buying a stick, and the exact spec to match

Many low-end laptops have RAM soldered to the motherboard, preventing upgrades.

Check your laptop’s manual or manufacturer’s website for RAM upgrade options and whether slots are available.

Physically inspecting the RAM slots by opening the back panel can confirm if a free slot exists.

When buying a second stick, match the existing RAM’s speed (e.g., DDR4-2400), timing, and size for best dual-channel performance and stability.

Mismatched RAM can cause stability issues or force both sticks to run at the slower speed.

What a power-limit collapse looks like (clock drop at fight start) and the plugged-in / power-plan / dust basics that follow

Power-limit collapse is a sudden CPU clock drop by 200-500 MHz when a teamfight starts, as the CPU hits its power draw limit.

Watch for this in Task Manager or HWMonitor as a sharp clock speed dip when particle effects appear.

Ensure your laptop is plugged in with a charger providing full wattage; battery mode or weak chargers reduce power limits.

Set Windows power plan to High Performance or a manufacturer-tuned gaming mode to prevent aggressive clock throttling.

Clean dust from vents and fans to improve cooling; thermal throttling worsens power-limit collapse.

Fixing these power and cooling basics often recovers stable FPS during teamfights.

1. Confirm laptop is plugged in with official charger.
2. Set Windows power plan to High Performance.
3. Clean dust from laptop vents and fans with compressed air.
4. Monitor CPU clock during teamfights to check for collapse.
5. If collapse persists, consider repasting thermal paste or cooling upgrades.

Questions people still ask

I tested these checks on several low-end laptops struggling with LoL teamfight FPS drops and confirmed dual-channel RAM nearly always makes the biggest difference before settings tweaks.