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Heatsinks and lapping

sxr7171

Diamond Member
So I personally have experiences where a much vaunted CPU cooler (Tuniq Tower) performed nothing like what it was supposed to.

Reading some overclocking diaries over at PCper and other places I keep hearing about large drops (I've seen 10C drops) in CPU temps after lapping the heatsink.

It's becoming very clear to me that manufacturers are putting out shoddy product. How can you charge $50-70 for a heatsink and market it up to high heaven with descriptions of the metals used, the number and placement of heatpipes and all sorts of little shticks the heatsink makers are using these days and not get the basics right? So obviously they are claiming that a certain amount of engineering thought and manufacturing detail has gone into making these heatsinks.

That's all well and good - BUT WHAT ABOUT GETTING THE DAMN CPU CONTACT AREA FLAT?

What a boatload of fail.


What is the point of all this NASA level technology in the heatsink when they can't even get the CPU contact area flat? Then we have 3rd parties charging $20 to lap the base. Why can't this be done during manufacture? I don't care if it adds $10 to my purchase price because that $10 is the difference between a $60 heatsink that performs like a $60 heatsink or one that is beaten by a $25 heatsink in actual use. There is no excuse for any heatsink vying for "best air cooling solution" to come with a bent out of shape contact base.


We as consumers need to let manufacturers know that we are outraged by this behavior (well at least I am and I think you should be too). It's like putting cheap $30 tires on $1500 forged alloy lightweight rims. This just needs to stop. Everyone just lap the base and add a few dollars to the price. Mention it in the specs/features and your price will be competitive since you are putting out a product that actually functions in the purpose it was designed for. I would happily pay an extra $5-10 for a heatsink that actually works to its potential.
 
The performance of this air cooler is beyond reproach, but we did find installation was often not much fun. You have to use a bottom plate for attaching the Tuniq through the Socket 775 mounting holes. This means the motherboard must be removed from the case to install the Tuniq. We wish Sunbeam could find a better way to mount, but we do prefer secure mounting of this large and heavy cooler to an easier solution that might be less secure.
 
I have seen problems on both ends. One cpu I had, Intel retail boxed had a serious dip in the center. I applied compound and raked a credit card across it to smooth it and the center was like a pothole 🙂

Also had a heatsink with the same issue. Hard to fix when the center is lower than the sides, only so much heatsink you can sand off.
 
Originally posted by: Modelworks
I have seen problems on both ends. One cpu I had, Intel retail boxed had a serious dip in the center. I applied compound and raked a credit card across it to smooth it and the center was like a pothole 🙂

Also had a heatsink with the same issue. Hard to fix when the center is lower than the sides, only so much heatsink you can sand off.
It's easier to flatten if it's concave, though.
 
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