A hot laptop is usually air, a fan, or the cooler not sitting on the die. People jump to paste because paste is cheap and YouTube loves it. I get more machines back to normal by cleaning the path first. The paste posts are for after you’ve already proved the air can move.
1. Make sure it can breathe
- Lap, bed, couch cushion: those pack the intake. Table, or a cheap stand that opens the bottom. Try that for one gaming session before you buy anything.
- Look at the exhaust. Gray felt in the grille is a packed heatsink. You can often see it without opening the machine.
- Power settings: Windows “Best performance” on a thin laptop with the charger in will cook it. You asked it to do that. It’s not a broken cooler.
I still use HWInfo or the laptop maker’s own temp tool when I want numbers. Idle in the 40s–50s C on a modern CPU is normal. 90s+ in a browser with one tab is not. What happens in a game depends on the chip. Context matters.
Intel vs AMD: 90°C is not the same panic
Old desktop advice was “keep it under 80.” That doesn’t fit a thin laptop. Both brands boost until they hit a thermal limit, then they drop clocks. Hitting that number in a game with the fans on is the chip doing its job, not dying.
| Chip | With cooling actually working | When I worry |
|---|---|---|
| AMD laptop (Ryzen) | Often 90–100°C in a game. A lot of these chips like using that whole range. Fans on, clocks holding, no shutdown: that’s just how they run. | Idle or a browser sitting in the 90s. Or it hits the wall in a few seconds with the fan quiet / cooler not on the die. |
| Intel laptop | Also runs hot in a thin chassis. Burst to the 90s (sometimes ~100), then power limit drops and temps come down. 85°C in a game is not automatically broken. | Same tells: idle heat, instant spike, fan not spinning. Don’t use a 2012 desktop “max 70°C” chart on a 2024 ultrabook. |
| Either one, desktop tower | A decent air cooler usually lives in the 60s–80s under load. They have room the laptop does not. | 100°C on a tower with a working cooler and clean fins is worth a look. Paste and a seated cooler still come after dust and fan. |
I don’t memorize every official max temp. If you want the spec, it’s in the chip’s datasheet, and the laptop maker may cut power earlier so the keyboard doesn’t burn you. What I actually check: is the fan working, is the air path open, and did it take minutes to get there or seconds. Brand doesn’t change that order. It only changes whether “95 in a game” makes me reach for paste.
2. Listen to the fan
Silent under load, temps climbing? Fan’s not spinning, or the board isn’t calling for it. Clicking, grinding, a fan that ramps and dies: bearing. Those I replace. Don’t oil a laptop fan with 3-in-1. You’ll have a worse mess in a month.
Bottom off (battery disconnected if you can). Look at the fan hub. Hair, pet fur, a carpet fiber wound around the shaft. Pull that and it often runs true again. Hold the blades if you’re blowing dust so you don’t overspin it. Same rule as the desktop dust guide.
On the bench
Laptop stand that opens the intake
Not magic cooling. It just stops the machine sitting on a blanket. I use one at the table so the bottom vents aren’t sealed. Skip the RGB gaming pillow.
- A couple of books under the back edge is the free version.
- If the vents are on the back hinge, a stand helps less. Side exhaust still wants the bottom clear.
3. Dust in the fins
Heatsink fins pack into a felt. Air goes around the cooler instead of through it. Paste can’t fix that. Compressed air or an electric duster, blades held, from the exhaust side if you can. I take the bottom off for this. Blowing into the grille from outside just drives the mat deeper on some chassis.
If the sink is still caked after a blow-out, the heat pipes and fan come off as one assembly on most laptops. That’s the same job as a paste job, so you might as well do both. Don’t pry pipes off the die and then “see how it goes” with no compound.
4. Now paste — and only now
Load temps high, fan spinning, fins clean, cooler seated. Then I look at the paste. Dried, pumped out, or a rice-grain on a big die. I wrote two guides for that: When thermal paste is the problem (should you even open it) and Thermal paste and pads (VRAM, VRMs, thickness). Don’t smear paste on the memory chips. That’s how those cards die.
| What you see | What I check | What I don’t buy yet |
|---|---|---|
| Hot on a bed, fine on a table | Intake blocked | Paste, a new fan, “cooling pads” with fans that dump dust into the chassis |
| Silent, temps climb fast | Fan not spinning or unplugged | A tube of compound |
| Grille looks fuzzy, fans loud | Packed fins | A motherboard |
| Clean, fans on, still 95C+ in a browser / idle climb | Paste / pads / cooler not seated | A new CPU. You can’t socket-swap a laptop CPU anyway. |
| Hot only on charger, fine on battery | Power limit, not a broken cooler | Anything. Lower the power mode first. |
When I stop
Warped bracket, missing standoff, liquid in the fan bearing, a heat pipe that’s been bent. That’s shop territory if you’re not comfortable reseating a cooler. Runaway to the limit and shutoff in under a minute with the fan quiet or the cooler not on the die is a heat-path or power problem, not “needs a new tube.” Time-to-spike and whether the fan is working, not the number on its own.
On the bench
A known non-conductive paste (if you already proved the air path)
Same tube I keep for the paste guide. Only after vents and fan. A small syringe. Not liquid metal on a first laptop.
- If you pulled pads around the die, put the same thickness back. See the long paste-and-pads guide.
- Battery unplugged before the cooler comes off.
Verdict
Blanket off, vents open, fan actually spinning, fins not felt. Then paste. Buy a stand or a duster before you buy a compound, and don’t buy a motherboard because the laptop was on your duvet.