Why does my new HSF give me horrible preformance?

MrBond

Diamond Member
Feb 5, 2000
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Bought parts to make another HSF last week, finally got them yesterday and put it together.

HSF can be seen here.

It's a Thermalright SK6+ heatsink attached to a Akasa Aluminum 60-80mm adapter, with a Zalman fan on top. My old heatsink was a Globinwin FOP38.

CPU temp with the Globalwin is about 50°C average. With the other cooler, it was 60°, and I'd get BSOD's left and right. The Globalwin is back on and the system runs fine now.

I can't understand why the other heatsink isn't preforming better then my old one. Is it the large air gap due to the adapter? Do I need a 60mm fan directly on the heatsink blowing up towards the 80mm fan? I had the 80mm fan blowing up, do I need to reverse it so it blows down on the heatsink?

What am I doing wrong here? Should I just scrap the 80mm adapter and just get a 60mm panflow or something similar? The idea was to eliminate noise, which the Zalman fan did well. This FOP38 is WAY too loud for me :disgust:
 

HiTek21

Diamond Member
Jul 4, 2002
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Try using your stock heatsink fan and see what kind of results you get, if you get better results than the 80mm w/ adapter maybe you should try looking for a quiter 60mm fan to put on the sink. It looks to me like there are quite a few gaps between the heatsink & fan adapter and between the adapter and the fan. Try putting some tape over the gaps and see if it does anything. Also try flipping the fan over maybe its a blow not an exhaust heatsink.
I've seen quite a few reviews about the Sk6+ and they all have temps in the mid 40's at full load. Good luck with your Heatsink
 

Fallen Kell

Diamond Member
Oct 9, 1999
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Yeah, check that it is blowing into the heatsink. Also, if you are going to put tape around the fan/duct, make sure the tape you use can take temperatured up to 70-80 degree's C without melting/burning. Last thing that you want is for some cheap tape to melt and catch on fire or melt off onto your video card and burn/short out something.
 

mechBgon

Super Moderator<br>Elite Member
Oct 31, 1999
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Also, with reference to the CPU socket, you want to slide the heatsink as far down the clip AWAY from the solid end of the CPU socket as possible, so it's clear of the solid part and doesn't get hung up on it. I think an SK-7 would be a better choice if you want to use an 80mm fan, since it's designed for them.
 

MrBond

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Feb 5, 2000
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I tried it blowing on the Heatsink, but I'm at 53°C and rising, the alarm will hit at 59 and the pc will shut down...I'm logging off now, don't trust this HSF in its current state
 

Fallen Kell

Diamond Member
Oct 9, 1999
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MrBond, its suppose to blow onto the heatsink!!! All ( well about 99.5%) heatsinks blow air onto the heatsink.
 

MrBond

Diamond Member
Feb 5, 2000
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Originally posted by: Fallen Kell
MrBond, its suppose to blow onto the heatsink!!! All ( well about 99.5%) heatsinks blow air onto the heatsink.
I remounted the fan so its blowing down now, I still had temps near 55°C at idle (or with one copy of IE running). With this FOP38, I'm currently at 51°C and it's not climbing (where before it started out at about 45°C and cliimbed ~1°C/minute till 55°, at which point I shut the pc down and reswapped heatsinks.

This adapter has two sides that are 90° to the fan, according to the directions, they're supposed to be like that. I don't want to bend them in at this point, although it might come to that.

I *love* the low sound I get with the other fan, I wish I'd just get low temps too :)
 

OulOat

Diamond Member
Aug 8, 2002
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Are you sure you didn't install the hs wrong? Why don't you try removing the adapter and holding the fan in place while you run some benches. Adapters do reduce airflow and increase noise produced by the fan because there is more backpressure and turbulance. You might want to just get a hs that is made for 80mm fans.