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Topic: BFL board project COINTAMINATION - EU facility - ORDERS OPENED for Chili - page 28. (Read 73081 times)

hero member
Activity: 826
Merit: 1000
Hi,

the heatsink looks like not to transports enough power from the chips. What are the stats? And what is the advantage against CPU cooler which is replaced by a simple all-aliminium heat sink?

Indeed I found good air flow cooling solutions here: http://www.kuehlkoerper.de/kammprofile-40-mm-190-mm/
My favorites are solutions with < 0,1 K/W at 10 cm length. This gives a max. of 25 K at 250 W :-)

Your heatsink looks like more a 0,5 - 1 K/W cooling solution, isn't it? So every newer cpu cooler could be better than yours?

Cheers...
Pierre

First plan was make it out of block of aluminium. But it didn't work out so this is a backup option... It is still batter then what we know it works so I guess it will be ok. Will see...

CPU cooler is not big enough. And it is made for cooling one point not 16... So you need a coper plate...
full member
Activity: 128
Merit: 100
Hi,

the heatsink looks like not to transports enough power from the chips. What are the stats? And what is the advantage against CPU cooler which is replaced by a simple all-aliminium heat sink?

Indeed I found good air flow cooling solutions here: http://www.kuehlkoerper.de/kammprofile-40-mm-190-mm/
My favorites are solutions with < 0,1 K/W at 10 cm length. This gives a max. of 25 K at 250 W :-)

Your heatsink looks like more a 0,5 - 1 K/W cooling solution, isn't it? So every newer cpu cooler could be better than yours?

Cheers...
Pierre
hero member
Activity: 826
Merit: 1000
Smiley We have backplate too... But it was not pack in this box... Some hiccups we have with suppliers... From what I understand it was packing error and they are on the way. It is a 5 year since my uncle died and we always get together on this date in Austria(where he lived) so I didn't have time to go for it myself. But I have 2 possible configuration ready for backplate. One with rubber where chips are and one with rubber in spaces between chips banks... Will see what will work best... And pads are planed so there is some room for hight error...
member
Activity: 80
Merit: 10
Well... hard to say... We did ask him not to trash it and we will check it... But he never got around to it... So hard to say... If he didn't load firmware on it might even not be toasted... It could even happen that it has good chips on it... Luke-Jr did have a lot of them but cooler was not put on properly so you can guess what happened... I did even post that on forum that he didn't do it right but he didn't fix it...
One thing I dont sure is that if this thing uses more than 300W power Why are you putting a simple CPU cooler on it? Isn't this gonna destroy the chips?
It uses less then 300 and probably less then 250W. And we are no longer using that... Just got first box of custom made ones... It was not made 100% to my specifications(some breking tools problems) so I'll need to test it but I guess it will work...

That black cooler works if it is on properly... It was problem that all chips didn't touch heatsink...



Hello lucko
A massive heatsink like showed on photo due its weight  will put a lot of mechanical stress on PCB  and possibly bend it if appropriate measures aren´t taken. If PCB isn't flat thermal transfer between chips and heatsink is not even and optimal.
Check w/ form about but is wise to have some mechanical frame in opposite side of pcb to avoid this problem
regards
legendary
Activity: 2408
Merit: 1004
hahha

so nice
free heating from the chilli

hero member
Activity: 868
Merit: 1000
If its down to 250w
then we need the most heat extraction we can get.

I was planning to turn "off" my central heating this winter, but now?...........
 Roll Eyes
legendary
Activity: 2408
Merit: 1004
hahahah
maybe we make a car
and not a miner Grin Grin Grin Grin Grin Grin Grin Grin Grin Grin Grin Grin Grin
legendary
Activity: 2912
Merit: 1060
Jesus thats like for an oil pump
hero member
Activity: 826
Merit: 1000
Well... hard to say... We did ask him not to trash it and we will check it... But he never got around to it... So hard to say... If he didn't load firmware on it might even not be toasted... It could even happen that it has good chips on it... Luke-Jr did have a lot of them but cooler was not put on properly so you can guess what happened... I did even post that on forum that he didn't do it right but he didn't fix it...
One thing I dont sure is that if this thing uses more than 300W power Why are you putting a simple CPU cooler on it? Isn't this gonna destroy the chips?
It uses less then 300 and probably less then 250W. And we are no longer using that... Just got first box of custom made ones... It was not made 100% to my specifications(some breking tools problems) so I'll need to test it but I guess it will work...

That black cooler works if it is on properly... It was problem that all chips didn't touch heatsink...

jr. member
Activity: 59
Merit: 10
Well... hard to say... We did ask him not to trash it and we will check it... But he never got around to it... So hard to say... If he didn't load firmware on it might even not be toasted... It could even happen that it has good chips on it... Luke-Jr did have a lot of them but cooler was not put on properly so you can guess what happened... I did even post that on forum that he didn't do it right but he didn't fix it...
One thing I dont sure is that if this thing uses more than 300W power Why are you putting a simple CPU cooler on it? Isn't this gonna destroy the chips?
legendary
Activity: 2702
Merit: 1468
Tom (JJ) has mailed a check with tracking #...

That is odd.  Miners sending checks?  What happened to bitcoins?  I guess everybody is hoarding now...

Anyway, glad you got your money back.
legendary
Activity: 966
Merit: 1000
- - -Caveat Aleo- - -
Tom (JJ) has mailed a check with tracking # to reimburse me so now I can pay Lucko directly for assembly.
Tom explained that he invested a lot of his own money in this project and had no intention of scamming anyone.
hero member
Activity: 826
Merit: 1000
Well... hard to say... We did ask him not to trash it and we will check it... But he never got around to it... So hard to say... If he didn't load firmware on it might even not be toasted... It could even happen that it has good chips on it... Luke-Jr did have a lot of them but cooler was not put on properly so you can guess what happened... I did even post that on forum that he didn't do it right but he didn't fix it...
hero member
Activity: 868
Merit: 1000
Yes everything is fine I'm just working really long days... And then when I finish some family time till my daughter goes to sleep and then board work...

Now I might say a word or two about JJ thing. I don't think he was there to scam anyone. I'm sure he was just doing the best he could but not have enough knowledge and back out. He only took dwdoc order as far as I know and he did send him a check to repay him. He lost confidence in himself being able to make this work when he destroyed one board without cooling and chips on the other two boards turned out dead...

Now form and JJ have a same friend that is a hero member so we assumed that hi is OK. I still think he just got over his head and nothing else. Now I really don't know what was bASIC and what happened so I can't say nothing about that...

Thank you Lucko for your post.

One question:- did he destroy the board or was it also part of the poor samples and he only thinks he toasted it?
hero member
Activity: 826
Merit: 1000
Yes everything is fine I'm just working really long days... And then when I finish some family time till my daughter goes to sleep and then board work...

Now I might say a word or two about JJ thing. I don't think he was there to scam anyone. I'm sure he was just doing the best he could but not have enough knowledge and back out. He only took dwdoc order as far as I know and he did send him a check to repay him. He lost confidence in himself being able to make this work when he destroyed one board without cooling and chips on the other two boards turned out dead...

Now form and JJ have a same friend that is a hero member so we assumed that hi is OK. I still think he just got over his head and nothing else. Now I really don't know what was bASIC and what happened so I can't say nothing about that...
legendary
Activity: 1593
Merit: 1004
Condolences dwdoc.  That really sucks.  It's times like that you really wish you had an uncle Vini.
sr. member
Activity: 476
Merit: 250
I just wanted to post here as a warning to anyone looking to buy a Cointamination board in the US to be sure to go to Lucko and not to purchase anything through JerimiahJohnson.

JerimiahJohnson is in fact Thomas Van Riper, who went by cablepair here. He's scammer tagged and still owes bASIC customers very large sums of money. As someone who had orders for bASIC products on order with him, I would not trust him with a dime. Go directly to Lucko.

Really?  He introduced himself as "Rob" in my PMs and emails.

+1 for Lucko.  

The bASIC scandal occurred before I joined the forum so I can't speak to that. Also JerimiahJohnson has already announced he is not currently accepting payment for board assembly.

However, I sent my 97 chips to JerimiahJohnson's assembly house in Oregon on 9/19/13 and paid him $3600. After waiting a month with no board assembly due to technical difficulties I called the assembly house and was told the chips and PCB's had been sent to Thomas Van Riper, St. Regis Falls, NY.

I know Lucko is frustrated about the way things turned out and is trying to fix things.

Yeah sorry to hear that dwdoc. Hey Lucko is everything okay? Is there anything we should know about?
legendary
Activity: 2912
Merit: 1060
legendary
Activity: 966
Merit: 1000
- - -Caveat Aleo- - -
I just wanted to post here as a warning to anyone looking to buy a Cointamination board in the US to be sure to go to Lucko and not to purchase anything through JerimiahJohnson.

JerimiahJohnson is in fact Thomas Van Riper, who went by cablepair here. He's scammer tagged and still owes bASIC customers very large sums of money. As someone who had orders for bASIC products on order with him, I would not trust him with a dime. Go directly to Lucko.

Really?  He introduced himself as "Rob" in my PMs and emails.

+1 for Lucko. 

The bASIC scandal occurred before I joined the forum so I can't speak to that. Also JerimiahJohnson has already announced he is not currently accepting payment for board assembly.

However, I sent my 97 chips to JerimiahJohnson's assembly house in Oregon on 9/19/13 and paid him $3600. After waiting a month with no board assembly due to technical difficulties I called the assembly house and was told the chips and PCB's had been sent to Thomas Van Riper, St. Regis Falls, NY.

I know Lucko is frustrated about the way things turned out and is trying to fix things.
legendary
Activity: 2702
Merit: 1468
I just wanted to post here as a warning to anyone looking to buy a Cointamination board in the US to be sure to go to Lucko and not to purchase anything through JerimiahJohnson.

JerimiahJohnson is in fact Thomas Van Riper, who went by cablepair here. He's scammer tagged and still owes bASIC customers very large sums of money. As someone who had orders for bASIC products on order with him, I would not trust him with a dime. Go directly to Lucko.

Really?  He introduced himself as "Rob" in my PMs and emails.

+1 for Lucko. 
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