PSA: Don't trust cheap thermal paste from Amazon bundles

I ordered a $12 repair kit off Amazon last month that came with a syringe of thermal paste. Figured it was fine for an old laptop I was reviving. After the CPU hit 95C under load and started throttling, I repasted with some Arctic Silver I had from 2019. Drop went to 72C. That cheap stuff was basically grease. Lesson learned: never use mystery paste from a random kit. Anyone else get burned by these bundle deals?

3 comments

3 Comments

green.noah10d ago

Yeah the "mystery paste" thing is real. One thing I don't see brought up - those cheap kits sometimes use thermal paste that's actually meant for LED drivers or power transistors, not CPUs. Those compounds have totally different thermal specs and can be way too thick or thin for a processor. I checked the datasheet on one random syringe once and it was rated for like 2W/mK, which is basically nothing. Your Arctic Silver from 2019 is probably still fine too, I've used tubes years past their "best by" date and they still worked great.

henryt1810d ago

That 2W/mK paste might actually be fine for older low-power chips though.

wright.leo10d ago

Wait, isnt this the same kind of thing that happens with cheap phone chargers and extension cords? I swear the "old stuff was better" thing applies to so much random junk we buy now. People think if its shiny and cheap it'll work fine, but theres a reason the good brands cost twice as much. That cheap paste is probably thick enough to stop a leaky pipe but thin like water when it gets hot. Ive seen the same problem with dollar store hand tools that snap the first time you put real force on them. It all points to the same lesson - you get what you pay for, especially with stuff designed to handle heat or stress.