Temperature goes up after adding a bigger fan?

[Jugernot]

I Just took apart the stock heatsink on my Duron and replaced the small 50mm fan with a YS Tech 60mm. My temp is about 3-5F higher now. What gives?

I replaced the thermal phase change pad to some generic silicon based heatsink compound is the only thing I can think of that would have caused it?

Any ideas?

 

[Mikewarrior2]

The orignal pad(also known as a phase change thermal compound(pctc for short)) is probably better than the generic grease.



Mike

 

[DaddyG]

Have to agree with MikeW. PCTCs claim to fame is not necessarly lower temps initially, but the ability to handle high temps over the long haul. One thing that PCTC does very well is to fill micro gaps when it goes through the change, so if your hs is not too flat and smooth, this could be the reason for your temp diffs. Many generic greases will just squeeze out, JonnyGURU had some good pics on his site.

 

[HecDTec]

Get Arctic Silver thermal grease. It will effeciently transfer heat from cpu to hsf thus lowering cpu temps. Ask anyone who's tried it. I being one of them. I have another friend thank me for reccomending it.

 

[jonnyGURU]

Jugernot: Your temp raised 3-5F by JUST swapping out the fan and not because you replaced the pad with grease, right?

Fact is, just because a fan is 10mm larger in dia, doesn't mean it moves more air.

 

[Jugernot]

Yah I figured it was the heatsink compound, but wanted a second opinion.

jonnyGURU, actually if you had read my message it stated I used a YS Tech 60mm fan, which pushes 27CF/M of air. This is more than any 50mmx50mmx15mm fan can do.

btw: I switched the cheap stuff with some Circuitworks Silver heatsink compound and my temps are back down to my previous levels.

 

[ride525]

Well, perhaps the new 60 mm fan is now overlapping the heatsink....and much of the air is now going down the outside of the heatsink, instead of into the heatsink.....

(or if the fan is set the other way, blowing out, then perhaps it is pulling significant air from outside the heatsink, and not through the heatsink)

 

[jonnyGURU]

Actually, I did read your original message which is why I said:

"Fact is, just because a fan is 10mm larger in dia, doesn't mean it moves more air."

You see, 60MM - 50MM = 10MM.

You now have switched to CircuitWork's Silver AND you have a larger diameter fan and you're ONLY down to the SAME temp as your 50MM fan and PCTC? There's obviously still an issue here. What if you put the 50MM back on?