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Lucko (OP)
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October 22, 2013, 07:21:25 PM |
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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...
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dwdoc
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Activity: 966
Merit: 1000
- - -Caveat Aleo- - -
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October 22, 2013, 08:15:02 PM |
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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.
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af_newbie
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Activity: 2688
Merit: 1468
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October 22, 2013, 08:44:38 PM |
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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. |
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xselam1988
Jr. Member
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Activity: 59
Merit: 10
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October 22, 2013, 09:35:15 PM |
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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? |
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Lucko (OP)
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October 22, 2013, 10:23:26 PM
Last edit: October 22, 2013, 10:39:47 PM by Lucko |
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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...  |
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bitpop
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Activity: 2912
Merit: 1060
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October 23, 2013, 08:28:49 AM |
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Jesus thats like for an oil pump
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jelin1984
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Activity: 2408
Merit: 1004
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October 23, 2013, 08:42:12 AM |
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Mudbankkeith
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October 23, 2013, 08:47:36 AM |
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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?...........  |
BTc donations welcome:- 13c2KuzWCaWFTXF171Zn1HrKhMYARPKv97
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jelin1984
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October 23, 2013, 08:52:07 AM |
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hahha
so nice
free heating from the chilli
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bx8389
Member
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Activity: 80
Merit: 10
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October 23, 2013, 10:20:52 AM |
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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 |
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Lucko (OP)
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October 23, 2013, 01:29:10 PM
Last edit: October 23, 2013, 01:45:05 PM by Lucko |
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 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... |
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asjfdlksfd
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October 23, 2013, 09:31:03 PM |
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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 |
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Lucko (OP)
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October 24, 2013, 07:01:10 AM |
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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... |
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Lucko (OP)
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October 25, 2013, 07:02:19 AM |
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Yeah sorry to hear that dwdoc. Hey Lucko is everything okay? Is there anything we should know about?
Well now there is... I'm closing orders for now. Production chips(they have logo on it and they looks to be different inside to) will not work with this board. It worked OK with my 8 samples... Well as good as expected. One of removed chips from Coinado short circuit and I had to disable one 4 chips bank. And since dead chips do some troubles on SPI I can see from 0 to 4 chips. Depends on luck. Now we are not sure what will take to fix this problem. Me and form were up till 1am figuring it out... Board will got to him today so he can look what could be the problem... I also contacted MrTeal who had the same problem how he solved it... Now for thus who send me chips please let me know what to do. |
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bx8389
Member
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Activity: 80
Merit: 10
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October 25, 2013, 10:21:05 AM |
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Yeah sorry to hear that dwdoc. Hey Lucko is everything okay? Is there anything we should know about?
Well now there is... I'm closing orders for now. Production chips(they have logo on it and they looks to be different inside to) will not work with this board. It worked OK with my 8 samples... Well as good as expected. One of removed chips from Coinado short circuit and I had to disable one 4 chips bank. And since dead chips do some troubles on SPI I can see from 0 to 4 chips. Depends on luck. Now we are not sure what will take to fix this problem. Me and form were up till 1am figuring it out... Board will got to him today so he can look what could be the problem... I also contacted MrTeal who had the same problem how he solved it... Now for thus who send me chips please let me know what to do. From BFL Schematics documentation I see "Revision C.4-Bitforce SC chips Pinout corrected". Have you last BFL schematic ? ( i think is revision E ) Regards |
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Mudbankkeith
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October 25, 2013, 11:22:39 AM |
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Yeah sorry to hear that dwdoc. Hey Lucko is everything okay? Is there anything we should know about?
Well now there is... I'm closing orders for now. Production chips(they have logo on it and they looks to be different inside to) will not work with this board. It worked OK with my 8 samples... Well as good as expected. One of removed chips from Coinado short circuit and I had to disable one 4 chips bank. And since dead chips do some troubles on SPI I can see from 0 to 4 chips. Depends on luck. Now we are not sure what will take to fix this problem. Me and form were up till 1am figuring it out... Board will got to him today so he can look what could be the problem... I also contacted MrTeal who had the same problem how he solved it... Now for thus who send me chips please let me know what to do. Have BFL changed the pinout between batches? |
BTc donations welcome:- 13c2KuzWCaWFTXF171Zn1HrKhMYARPKv97
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ChipGeek
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October 25, 2013, 01:20:19 PM |
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Have BFL changed the pinout between batches?
No. |
Tip jar: 1ChipGeeK7PDxaAWG4VgsTi31SfJ6peKHw
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Mudbankkeith
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October 25, 2013, 02:27:30 PM |
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BTc donations welcome:- 13c2KuzWCaWFTXF171Zn1HrKhMYARPKv97
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Lucko (OP)
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October 25, 2013, 06:11:04 PM
Last edit: October 25, 2013, 06:33:23 PM by Lucko |
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Thanks all who are trying to help. For now test were done only on one board with real chips. There are 2 more and I just send all to form(my board guy is away on travelling). I don't have that much equipment as he. There might be also a possible that there is a mistake on a board or one of the components that prevents Atmel to work or error on Atmel itself or something on chips(that is a suspect at the moment) but this type of error we seen first time. I did get a replay from MrTeal and I would like to thank him for it and he give me idea but can't be tested(since boards are on the way to form). I will be in contact with him over the weekend and I hope we can figure it out... If not form will do his best next week.
Now what MrTeal told me is that this chips act differently then "old" one when you turn them on at low voltage. And we are turning them on at minimal voltage and then increase voltage to 1V. So that might be it... But it doesn't fit problem 100%...
Anyway I will do my best to have some backup plans ready ASAP...
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GrapeApe
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October 27, 2013, 07:43:01 PM |
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Well I haven't jumped ship. I have no where else to go so I (we) are counting on you.
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