Lapping a Taisol CGK742092 Heatsink/Fan ???

[CarpeDeo]

I just bought a Taisol CGK742092 Heatsink/Fan. The bottom of the heatsink is NOT smooth at all (little manufactured ripples). But it looks like Taisol made the bottom that way on purpose (it consists of many many tiny consistent manufactured grooves). Should I lap it? Or is it better to leave it that way (did Taisol intend for it to be left this way?).

 

[conlan]

lap that puppy!

 

[Stoneface]

Stupid question below:

What is lapping?

Thank you in advance.

 

[Stoneface]

Stupid question below:

What is lapping?

Thank you in advance.

 

[Stoneface]

Stupid question below:

What is lapping?


Thank you in advance.

 

[breweyez]

Who knows...maybe its on purpose. Seems strange to me. are they deep grooves?

Stone face...lapping is like machining a surface to be flat

 

[yo2tup]

they are pretty deep grooves imo, so i lapped the hell out of mine before i even installed it

 

[DaddyG]

I'll add my 2 cents. The pre-applied Phase Change Thermal Compound is heat fused to the base of the hsf and doesn't appear to be effected by the less than perfect surface. Arctic Silver works much better on a smooth flat surface so lapping is desirable. AS will work very well on the standard machined surface BUT its much more difficult to apply in a consistent manner.

 

[Regalk]

For what it is worth I noticed those grooves myself but was a bit lazy to lap. I changed the fan on the Taisol for a globalwin 4400RPM one.
With arctic silver the temps are as follows:
TBird 800 o/c to 980 (Iwill kk266)
Idle - 26C
Load - 40C (after 10 hours burn in). Tha's good enough for me.

 

[EvilDonnyboy]

The grooves are from machining in the factory. Most of the time, the bottom with be either consistently flat but with grooves or domed, curved without grooves. You can prolly guess it's better to have a flat surface with grooves than a smooth surface thats curved/domed. The grooves are a result from machining, which is a process to make the surface almost perfectly flat. Without machining, it can be sanded more cheaply for a smoother finish but most likely be domed/curvedd due to the lack of measures taked to flaten it out.

But some manufacturers go to the lenghts to machine it, then precision sand it, for a "pre-lapped" finish. Most alpha's fall into this catagory. Most GlobalWin's are just machined, no factory lapping. Most generic no-named crap are not machined at all, just crappily sanded for a domed/curved surface.

 

[SEOTAIJI]

hmm.. i just orded this hsf
is it ok if i use it stock? without sanding or lapping or whatever?
im gonna put it on my 1.2ghz chip, so should i sand it down or something?
thanx
latez

 

[xraymongral]

Mine is smoot and flat(checked with straight edge). Might be differnt runs are of differnt quality.

 

[Tarkus]

I just received mine this morning, and it's also smooth and flat. This piece is extremely well built -- can't wait to slap it on!

 

[SiliconVandal]

Just ordered mine a few hours ago. Am I going to have to sand it too?

 

[Losty]

mine came with groves...circular looking pattterns...deep? ... well ... i think it's significantly deep ... when i take off the hs ... i can see the left over marks on the cpu from the thermal paste on it...lapping it would be much better...

so...how do you go about lapping it? bare hands ... and sand paper?