How much Thermal Paste to apply?

Leopardos

Senior member
Jul 15, 2009
332
2
81
Hello,

Im getting a new motherboard with i7 2600k ...
i dont want to ruin the parts like the last time ...

Last time i bought ‎Zalman Super Thermal Grease ZM-STG1 (3.5g)‎
i applies all the bottle which is 3.5g ... and then after 2-3 months ... i noticed that there was a leak to my CPU slot on the the motherboard between the pins ..

im getting the Antec Silver 5 ... do i have to put all the bottle or just 3/4 or 1/2 ?

Thanks
 

Rifter

Lifer
Oct 9, 1999
11,522
751
126
you put 3.5g on one CPU? seriously?

On to the point of the post a very small sized drop is more than enough. Maybe the size of a few grains of rice. You could get away with less if you manually spread it onto the CPU/HSF prior to installing the HSF, perhaps a single grain of rice sized amount but if you are going to rely on the pressure of the HSF to spread it out i would use a little more.
 

Leopardos

Senior member
Jul 15, 2009
332
2
81
you put 3.5g on one CPU? seriously?

On to the point of the post a very small sized drop is more than enough. Maybe the size of a few grains of rice. You could get away with less if you manually spread it onto the CPU/HSF prior to installing the HSF, perhaps a single grain of rice sized amount but if you are going to rely on the pressure of the HSF to spread it out i would use a little more.

Ye seriously im afraid ....
Okey .. so i will put the amount you saied , but ... should i spread it with old credit card or something ? or its risky ? (I will be applying on the CPU only ... not on the HSF)
 

Rifter

Lifer
Oct 9, 1999
11,522
751
126
a CC works fine to spread it thats what i usually use. You just need enough on there to fill the small ridges in the metal, not enough to cover the whole surface. If you see it seeping out of the edges you have used to much.
 

kaihonsou

Member
Jul 30, 2010
85
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0
Half a pea-sized blob in the middle and your sorted!

Applying thermal paste used to be the scariest thing for me to do. If your slightly compulsive its not easy. Im actually considering reapplying the paste on my CPU because I used some generic paste and found a tube of OCZ Freeze in my room :(

Kai.
 

Leopardos

Senior member
Jul 15, 2009
332
2
81
Okey ... Thank you guys very much...
I now realize how crazy i was applying 3.5g paste..
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,389
8,547
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I don't know if I would recommend a CC. I use a cotton ball to spread gently.

and you don't get cotton fibers stuck in it?

a credit card gives a rather uniform and thin layer.

a razor blade would be even better. though might scrape off too much
 

Gigantopithecus

Diamond Member
Dec 14, 2004
7,664
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I've found the difference between just laying down a rice-grain sized trail and actually taking 10-15 minutes to spread it out with a scalpel results in a temperature difference of at most 2-3 degrees under load.

Unless you're a benchmark-crazed hardcore overclocker, a grain of rice in the center of the chip and you're done.
 

SickBeast

Lifer
Jul 21, 2000
14,377
19
81
OP: the size of a small grain of rice.

Then, seran wrap your finger to spread it.

Have a nice day. :)
 

polarmystery

Diamond Member
Aug 21, 2005
3,888
8
81
Remember, the point of thermal paste is to maximize the metal surface to surface contact areas of the heat sink and the CPU. You want a small amount (such as pea sized) just enough to cover the die, and no more.
 

Rvenger

Elite Member <br> Super Moderator <br> Video Cards
Apr 6, 2004
6,283
5
81
I noticed with some coolers like the Hyper 212+ you need a little more to fill in the voids of the heatpipes. I make (2) .75" narrow lines towards each end with a little dab in the center. It always seems to have good results.
 

Leopardos

Senior member
Jul 15, 2009
332
2
81
Well thanks guys ..
i bought my new rig ...
i used just a pea-sized blob without CC or any thing ..
my 2600K temp with MINI Fan speed 28C Idle ...
i didnt try the Prime95 ;O afraid .. haha
its could be 50C max with full load ..

And im more than happy :D 2600k and GTX570 , Super fast PC :D
Here i come BF3 :D
 

SickBeast

Lifer
Jul 21, 2000
14,377
19
81
I noticed with some coolers like the Hyper 212+ you need a little more to fill in the voids of the heatpipes. I make (2) .75" narrow lines towards each end with a little dab in the center. It always seems to have good results.
There is no need for that.

I did not do that and my Phenom II does not exceed 50C when highly overclocked.

Less is more with thermal paste.

Put on a small rice grain sized drop, then spread it using your seran-wrapped finger. It's like putting on a thin coat of paint.
 

Rvenger

Elite Member <br> Super Moderator <br> Video Cards
Apr 6, 2004
6,283
5
81
There is no need for that.

I did not do that and my Phenom II does not exceed 50C when highly overclocked.

Less is more with thermal paste.

Put on a small rice grain sized drop, then spread it using your seran-wrapped finger. It's like putting on a thin coat of paint.



Great but I have not had any issues with how I used the thermal paste but I am using Ceramique and that stuff is really hard to spread. If I put a little pea size in the middle, I will end up with a smashed blob in the middle.
 

Ferzerp

Diamond Member
Oct 12, 1999
6,438
107
106
APPLY ALL THE THERMAL PASTE!

(ok, not really, but that was my gut response).
 
Jul 10, 2007
12,041
3
0
i put a thin layer in a cross pattern on the CPU, then i press the base of the HS against it and twist in both directions a couple of times.