sk-6 problem :-(

[elimcpheron]

im never gonna buy an asus again if that is the problem

 

[Blain]

I've read before about Asus MBs giving high temp reports. Is your system locking up or chugging along like a champ?
At 65C, I would think you'd notice some problems.

I've lapped (ok, sanded), HS using some wet/dry (wet) sandpaper on a thick piece of glass. Water on both sides of the sandpaper will make it "stick" to the glass pretty well. I start with 320 and go to 400 or 600 grit.

 

[Mikewarrior2]

You're never gonna buy an Asus board again because it "reads" temps hotter (not run hotter, but read hotter, due to different correction schemes implemented by Asus)?

Despite the fact that the Asus boards, despite supposedly reading "too high as everyone likes to claim" still under-reads the DIE temp?



Mike

 

[WarCon]

As far as I know, lapping is done on a specialized lapping table. A lapping table.......link......link2.......link3.

The principle is similar to placing an abrasive (sandpaper) on a flat surface and rotating the lapping plate while apply pressure to the object so its surface gets smooth (lapped). Lapping is used to obtain a smoother precisely polished surface. Gems are lapped, so are the slices of silicon disks used for chip making (or they use to be, not sure if they still are). I just can't think of anyway of using a lathe to lap a surface. Won't say it isn't possible, but not standard.

So technically since we are not using a "lap" maybe we are just sanding. But so no one gets confused and just takes a piece of sandpaper to the bottom of their heatsink, maybe we ought to just continue to use the term, since for computer enthusiasts it means a special process.

 

[sygyzy]

I have the SK6 and have tried installing it many times. Yes I have the clip on right and yes I have it as far away from the SOCKET A ledge as possible. No matter what I do my temps are 46-50 C consistently. What a POS!

 

[Mikewarrior2]

sygyzy,

you do realize that every motherboard reads temps differently? Some mb's, couple with whatever your ambient case temp is, may not read under 46-50C. Dont' call the hsf a POS unless you have a low-reading mb and a low case temp.... it just may be your particular setup that shows you temps that are inline with others with teh same hardware you have.



Mike

 

[NathanD]

Sinful Weeper, I think you need to talk to a machinist about how they make a surface flat, and have a look at Warcon's post and links. And I do know the difference between a metal lathe and a wood lathe, as I've used both.

A problem I had with my SK-6 (besides the machining grooves on the base) was the clip's bend that contact's the heatsink wasn't centered above the die, it was a little over a 1/2 cm off. I'm not sure if that was designed that way intentionally but bending the leg on the short side in a little, made a difference of several degrees. Also the contact patch of AS is considerably more even. I can see all the writing from the die in it instead of just half.

 

[MisterDuck]

Trusting the temps that your motherboard provides (with the exception of thermal diodes on the CPU) is a seriously worthless assesment of your overall cooling setup, in my opinion. I'm willing to bet money that your temps are perfectly fine and it's just the Asus board - if it's really that much of an issue, you should set up another thermostat inside your case to get accurate temps. I bet the system instability you're experiencing is due to the power supply, not the cpu overheating - or another part of your system.

Or better yet, return your sk6 and get an alpha 8045 or something (which is arguably just as good) and see if your temps drop. If they don't, then it's probably just a high reading on your MB.

Cheers,
MisterDuck

 

[sygyzy]

mike,

Athlon XP 1800 not o/c
Soyo Dragon Plus.

I think that is a very typical setup. Temps have been 49-50 for the last few hours.

Two other temps (mb and ambient, cannot figure out which is which) is 34 and 37. Yeah that's high right now but normally it's like 23/mid 30's. So even when they are low, the temps are the same.

 

[SinfulWeeper]

Well I have used a lathe to do some lapping and it is very common, especially on things like disk brakes. There is an attachment that is used by simply controlling the ammount of metal it cuts by slowly moving a blade towards the center. You can control the depth for how deep it cuts.

Those lapping machine that were all linked do the exact same thing, except the it was specifically meant for the job. True given the fact that the lathe method I am talking about is not in stock form a lapping machine. But the price of the attachment and the lathe cost less than a lapping machine and the end results are 100% the same.
If done properly it will come out with a flat surface. Otherwise a person would see a lot of dead engines or vehicles around. I mean can you imagine what would happen on a engine if the cylinder is not round? Or the brake disks are not round either?

Anyway enough. They both end up doing the same thing to get the same result. Only differently like 2+2=4 and 2*2=4

 

[WarCon]

Well, I am guessing since your using a blade and lapping machines typically use ultra fine particles (much like sandpaper has), then I am guessing that they don't work the same. Also lapping machines work to tolerances your lathe and a blade never could. On a microscopic scale (which is what lapping machines are designed to polish to, the surface a blade would leave would look something like Mount Everest and the rest of the Himalaya's versus a lapped surface that would look like rolling hills.

As far as I know turning (not lapping) a brake rotor requires much less tolerance than polishing a surface, but I could be wrong.

 

[elimcpheron]

no, im not gonna buy asus again because of that fact, i want my temp to read the same as other brand boards, i dont care if its actually lower than what it reads.

the only time ive been below 40 celcius with it was when i was running the delta screamer in it with the side open and it right next to an open window in mid december, i was freezing my balls off, my motherboard read 10 celcius flat... thats cold!!!!!!!!!

 

[NathanD]

I hadn't realized that double-disc grinding could achieve such flat parallel surfaces, and possibly you could rig one of these machines up to do the base of a HS. But the machine to do this is not a lathe.



<< Typically, however, double-disc grinding can hold size tolerances to as close as 0.0001 inch and flatness to within 50 microinches, while achieving surface finishes as fine as 5 rms with conventional abrasive discs. (Polishing discs typically produce surfaces of 1 to 2 rms.) >>



On-car, high end, specifically for rotors, turning:



<< <a target=new class=ftalternatingbarlinklarge href="http://www.procutinternational.com/html/awards/chrysler_review.html">.025 mm (.001") disc flatness
.051 mm (.002") lateral run out, as measured at the center of the braking surface
.0051 mm (.0002") rotor thickness variation</a> >>



0.001" is between 320 to 400 grit (average), and this is on a high end rotor turning machine. On my SK-6 400 grit paper very quickly removed the machining marks, why would you want to make this worse? I suppose you could make a mounting system to mount your HS on a lathe with the base perpendicular to the chuck, and come up with some way to mount some kind of mirror polishing system parallel to that, but that's a lot of work. You can get lapping compound down to 1 000 000 grit.

You know, I have no idea what the point of this post was originally supposed to be! I'm going to call around and see how many shops in my city (population 100 000 aprox.) have a lapping machine - and what it would cost to have the base of my SK-6 lapped.