Topic: Swedish ASIC miner company kncminer.com - page 315. (Read 3049515 times)

Mining btc is final hobby

just curious, any reason to use 90^o fittings versus straight in fittings to the waterblock?

Are you in this to get a little money back or just fooling around and tinkering like a hobby?

The VRM heat goes from VRM -> foam -> plate ->  some radiates off the plate some may transfer down from the plate into ASIC heatsink but that would depend on temperature of each part.
The heat only goes to cooler places, if the base of heatsink is hotter than the plate(not VRM temp BTW) it will warm it(plate) too.

(second law of thermodynamics??)

If the 'heatsink base' is cooler than the plate, adding a dab of grease between plate and heatsink would help.
Else the ASIC will contribute to VRM temp issues.

Would need to attach thermocouple to a small probe  and measure plate and base of heatsink to 'know'.

The plate is WELL MANUFACTURED.
They are almost perfectly flat.
Turns out IMneverHO that flat is not ideal.
I bend the ends of the outer legs down for better contact of plate/foam/VRM.

Easy no parts needed improvement in VRM temps!
You can look at imprint in foam and determine where it needs more pressure.

It can be done without unsticking heatsink from ASIC if you bend the fan back and carefully pry plate up from VRM's.
The foam acts like doublesided tape.
It's more like clay or plumbers putty than foam.

I also squeezed the foam/clay a bit to make it taller before reinstall of plate.

YMMV


EDIT there is also foam below PCB under same challenged VRM's.
Raising cubes up a bit will help bottom of case radiate some of the heat.

The whole foam thing is an OK idea but poorly implimented.

true, somewhat, if a bit backwards......  the 8 VRM Jupiters were the "early" ones.  
Mostly, people got the 4 VRM Jupiters, which "overclocked" just fine tho.
The "lucky" few people who got the early 8VRM Jupiters normally had dead VRM's... unless you did some tweaking.
Now, with Neptune's power requirements, all come with 8 VRM's, with all 8 nearly "maxed out".

We now have shipping confirmations on KnC forum from today; still nobody has confirmed receiving a Neptune since Q2.

As I understand it to cool Neptune VRM's there is a poorly manufactured aluminum plate in the form of an "E" with the outer legs on the VRM's and the middle leg holding the heat sink in place.

There is some kind of thick heat foam between the VRM's and the plate to transfer the heat to the plate but then where does the heat go? Is it dissipated by the metal plate or is it thermally bonded to the top of the heat pipe sink?

Thanks

 Of course, you're right.  I hadn't consider the fact that they said, "We have a 500 machine here for you."
Also, the earliest customers got either the 4VRM or crippled 8VRM machines and those ordering later got 8VRM machines which run cooler and faster and overclock really well.
AND the people hashing in their data center were (allegedly) compensated 4 BTC due to delays but the people having miners shipped a week late got none.
The more I think about it the worse it gets.
 

A slight misfortune has visited tolips secret watercooling lair.

First WB install went almost perfect.
Slight problem with ASIC temp. Not bad just no improvement.
Turns out there is sand in the vaselene that came with waterblocks.
Was prepared with other grease anyways.
I had hoped stock grease was adequate for testing, guess not.
So far trivial expected issues.

Move on to second waterblock install and lady luck exits left stage.
One of the 90's I attached to the waterblock FAILED.
It did not seperate completely, I would have had water everywhere.
(yes I was working on it with loop running and other ASICs hashing away)
I have so much flow I have to run only one pump out of two else air bubbles do not collect in resivour.
Woulda been like turning on a garden hose if it had seperated completely.

After I replaced the failed part my PCB only indicated 5 VRMs.
If you ever had a hard disk failure on a PC you may know how I was feeling at the time.
I did not panic, just got out the vacuume and PC crevace tool.
It took a few tries to get the VRMs to go again.
I also let the working VRM's help boil away the water.

All is well now and I'll (much more carefully) install the other 3 today sometime.

Come monday it's time to throw more money at it and get better 90's for all the waterblocks.
I'll also try and extract a pound of flesh from vendor for selling such shit.

Second time I had an issue with 90's from this vendor.
First issue was restricted flow in otherwise bulletproof  cool lookin 90's.
With the leak I am done playing nice, the shit is too fragile for the application.

What's interesting about this adventure is that it is same PCB that challenged me installing 12AWG power wires onto.
I ended up bypassing the PCB 12V copper and running wires directly to each VRM.
The good news is that it was not my mods failed only a temorary shit new part/rain delay.

All in all, for me, it's fun to visit the bleeding edge.

YMMV

Am I reading the information right?
After KNC announced in the news of a chip shortage, we will have all of batch one shipped within the next few days?
After finally convincing my brother to refund over this "chip shortage" , they'll probably deny it and ship them anyway. I Hope not.
All this deception is to "keep the competition guessing"?   What about the customers? WTF? This is getting too deep.
Here I go again, not knowing if I should get on the plane or what?

At the end of the day when you consider, the BFL's of the BTC world, sometimes fraud 10 times doesn't look too bad. 

Its 240 CFM.  

http://www.newegg.com/Product/Product.aspx?Item=N82E16835213001&cm_re=delta_120mm_fan-_-35-213-001-_-Product

There stock 120mm fan was mounted on the inside but I removed that and had to mount the delta fan on the outside because the delta fan is thicker and wont fit on the inside.  Also I had to use a 120mm to 140mm fan adapter which also adds thickness.  Thats why it looks so bulky in the pic.  It blows air into Neptune.

FTFY

I'll vouch for the quality, as I have an H80 in my main workstation at home and it runs literally silent. I used the fans that came with it, as they seemed to be good quality fans. You can use one exhaust fan on the radiator or use two. One side pulling air out and the other pushing it out. I think that configuration would be very efficient. Most everyone concentrates on keeping the chip itself cool, but as long as you keep whatever is keeping the chip cool itself that will work. Example, an automobile. Keep the radiator fluid cool and the rest will fall into place. Damn, I wish I had some tinkering to do....have this new dremel here which needs a good workout.

Jelin, stop degrading yourself and spend a dollar on a book and learn English the old fashion way. Seriously, the book only cost $1 and shipping is $2 or something. So get your $3 dollars and learn some English. They do say it is the International language. It's really fun and you can draw lots of smileys in the book too!


http://www.abebooks.com/English-Grammar-Dummies-Geraldine-Woods/13104155413/bd?cm_mmc=gmc-_-gmc-_-PLA-_-v01

You may be right, the ASIC chip even in its normal operating mode I think runs hotter then an overclocked processor. I still think that kind of setup would be really nice, clean and compact though. Like I said, if there is a will, there is a way. I'm assuming those H80's are filled with some kind of gel or oil.  Maybe if that material is replaced with something that can keep it cooler it would work. Something is pumping that liquid through the radiator, just has to keep up and be powerful enough.

Here goes nothing:

Scam Cole.

How much CRM for the delta fan? It is used to blow the cold air in right? I thought there is a fan inside the box?

So I only committed fraud 10 times, not 100, obviously makes it all better..

If you think KNC is deceitful look at Blackarrow or Hashfast.