Applying thermal paste for the 1st time

MSgherzi

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I need to re-attach a heat sink onto a processor and I'm wondering what type of thermal compound is best. Are the names thermal grease, thermal compound, and thermal paste all synonymous? On newegg.com I found thermal compound with the following specs:

Model
Brand ZEROtherm
Model ZT100
SPEC
Specifications Grade AA, premium thermal paste
Thermal Conductivity: 3.1 W/mK
UL Rating: 94VO pending
Density: 2.73 g/cc

http://www.newegg.com/Product/Product.aspx?Item=N82E16835887010

I don't know what any of the conductivity, ratings, or density means, but would this do or does it depend on the processor or heat sink?

Thanks.
 
Last edited:
Thanks. I canceled my order and bought the arctic silver instead.

Two other questions:

1. Do I need to scrape off the remaining bits and pieces of the dried up thermal paste left over? If so, what's the best tool to use so I don't damage the housing or the heat sink?
2. Once I apply the compound, how long do I wait, after I apply the heat sink, to power up the machine?

Thanks again.
 
Use a q-tip/paper towel and isopropyl alcohol (rubbing alcohol) to get the old stuff off. Don't get fingerprints, dust, etc on it before you apply the paste. You don't have to wait any time at all, though they say after several hundred hours you will get slightly lower temps as it sets in. It's important that there isn't anything in between your two surfaces, and I've read from manufactures that even finger prints will hurt the performance of heat transfer, and technically you should apply the paste and heat sink is a clean room environment (yeah right!). Unless you are sending out space probes or going for world records I think it's overkill, and a waste of money on the expensive arctic silver stuff as well.

All that being said I've tried the thermal paste by the book approach, and I've tried my approach. Mine being a finger and a cheap ass 150 gram tube for $10. Apply a little paste to a clean finger, smear around a light coating over the whole contact area, and apply heatsink and twist it back and forth to get the excess out. Haven't noticed any issues on any of them that I've done like this. If you're over clocking/phase changing your system a degree or two might be critical, but otherwise as long as you use some sense anything works.
 
Warning

Should never touch thermal paste with your bare skin. As all thermal pastes contain metal oxides which can seep into your body and poison you.

Especially in the Computer Industry where we are dealing with this stuff on a daily basis.
 
Should never touch thermal paste with your bare skin. As all thermal pastes contain metal oxides which can seep into your body and poison you.

Especially in the Computer Industry where we are dealing with this stuff on a daily basis.

So what should I use to spread it around? Or do I need to? I was thinking, from what I seen and read, that once you put some on there and put the heat sink on it, that twisting and turning the heat sink will now only get the excess out, but spread it as well.
 
I use Arctic Silver and apply a BB sized drop of it in the middle of the processor. Then I just let the pressure of the heat sink spread it out.
 
Just make sure to put the thermal paste on the top side of the processor unlike this.

Though, we later determined that it was phase change cooling which kind of killed the fun :(
 
Just make sure to put the thermal paste on the top side of the processor unlike this.

Wow - I haven't laughed that hard for ages..:D

I clean CPU and heatsink with Fuelite and a rag, then squeeze and small drop of Arctic Silver on the CPU and rub it in with my finger. (for best thermal transfer, the paste needs to get into 'grain' of the metal.).

Most current CPU's don't run all that ho, but those 3.6GHz Prescott, and Pentium D's were real cookers!
 
Arctic Silver is all I use. The thing to always keep in mind is
more is not better. Only a little applied is all that is needed to
get the proper heat tranfer to work best.
 
Should never touch thermal paste with your bare skin. As all thermal pastes contain metal oxides which can seep into your body and poison you.

Especially in the Computer Industry where we are dealing with this stuff on a daily basis.

I am going to call you on this... I want proof. Looking up thermal compound and other related terms turned up zilch for any health or toxicological effects. Looking up the common compound used in thermal pastes produced very little, and you'd need to inhale the oxide in order to do anything in the one mention I found. Another one states something about inhaled nano particles.

What about the emissions when you walk outside your door, or even inside your house. How about the vapors given off in your car from the vinyl and other items, I read they cause that film on your windshield that is so hard to completely clean. What about new homes where you are supposed to live with your windows open for so long due to out gassing, much the same as your car. How about the microwave plastic scare. What about people being afraid of irradiating food as a safety measure, yet these idiots are afraid of it being radioactive when there isn't a chance in hell. Perhaps I should ask how many people smoke, live with smokers, hang out with smokers... or perhaps do onsite work where someone is smoking? THAT HAS BEEN PROVEN TO CAUSE HEALTH EFFECTS! What about the lead in solder on those old boards you handle, do you religiously wash your hands afterward? What about breathing, oxygen causes free radicals that cause DNA damage which could lead to cancer. Are you overweight? Diabetes, heart issues, etc. Do you exercise regularly? Do you eat red meat? I hear that's not the best for you. What about the stuff in the water you drink, it's not pure H2O you know, plus there is a bit about fluoride in the water that it's not necessarily good for you as some people claim. Do you have any florescent lights where you work or live? Did you know it's damn near impossible to clean all the mercury up if you break one? You need to throw out carpet, clothes, etc that comes in contact with anything near that breakage. You can vacuum it up, you can't get it all up, it may linger in any air conditioning/heating system you have for years and years.

Yet you have an issue with thermal paste on my finger for 5 seconds that I wash off. Perhaps if I lathered up with it and left it on for life... but then maybe it would block all the UV rays outside and prevent skin cancer, you do use sun block every time you step outside right?

Don't post scare mongering without some kind of proof, especially when there are things out there that will hurt you much more, and more surely.
 
I use OCZ Freeze from Tiger Direct and 91% isopropyl alcohol to remove the old stuff. Put a drop of the paste in the middle and then spread it to the outside with a single edge razor blade. I get almost perfect coverage and no mess. ;)
 
Alright thanks everyone. I'll buy some rubbing alcohol from Walgreen's or something and use that with a q-tip to take off the paste already on there. When my compound arrives, I'll put a dab the size of a BB and I'm going to use the heat sink to spread it around once it's on there and I'll be careful to make sure it doesn't spill out of the sides onto the board and damage other parts.

Thanks!
 
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