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Topic: Klondike heatsink sourcing - page 2. (Read 11745 times)

sr. member
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Merit: 250
hero member
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Merit: 1000
June 06, 2013, 01:45:54 PM
#50
subforum  Tongue

Beg and u still no receive subforum!
KS
sr. member
Activity: 448
Merit: 250
June 06, 2013, 01:22:33 PM
#49
subforum  Tongue
hero member
Activity: 924
Merit: 1000
June 06, 2013, 12:36:52 PM
#48
Might be good to consolidate all our various extra Klondike threads to one.

1. Casings
2. Controllers
3. PSUs and cabling
4. Firmware  / Mining Software
5. Miscellaneous
6. DIY Build information
7. Pricing and sourcing of PCB, BOM, etc.
8. Heat sinks and cooling

KS
sr. member
Activity: 448
Merit: 250
sr. member
Activity: 294
Merit: 250
June 06, 2013, 08:56:25 AM
#46


The price for 200 pcs batch is 3.90 EUR
In 1000 pcs I can probably fit in 3.650 EUR

Nice job.
hero member
Activity: 728
Merit: 500
June 06, 2013, 08:08:21 AM
#45
excluded
KS
sr. member
Activity: 448
Merit: 250
June 06, 2013, 07:53:37 AM
#44


The price for 200 pcs batch is 3.90 EUR
In 1000 pcs I can probably fit in 3.650 EUR

VAT?
hero member
Activity: 728
Merit: 500
June 06, 2013, 07:14:37 AM
#43


The price for 200 pcs batch is 3.90 EUR
In 1000 pcs I can probably fit in 3.650 EUR
full member
Activity: 378
Merit: 100
June 05, 2013, 11:18:16 AM
#42
What are we looking at for pricing on these?
sr. member
Activity: 350
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June 05, 2013, 09:02:36 AM
#41
pm sent...

Ill be looking for around 100-200 too Cheesy
sr. member
Activity: 457
Merit: 250
June 05, 2013, 08:58:52 AM
#40
Whatever size ends up being chosen, I would think we will want standoffs/spacers to prevent the PCB from curving/warping and loosing contact in the middle due to potential over tightening on the 4 corners. They can be measured to make sure the heat sink still has an interference fit, but keep the warp-age to a minimum. (Think Phat Xbox PCB's  Tongue )

Hmm, just saw the CAD pic for the K16 today. Good design, renders my above concerns mostly obsolete.
hero member
Activity: 714
Merit: 500
June 05, 2013, 04:18:53 AM
#39
Steamboat, do you have any plans to also provide heatsinks for the Nano?
hero member
Activity: 648
Merit: 500
May 26, 2013, 12:15:27 AM
#38


questions, comments, concerns?
Looks like a good design.  Are you planning on using a thermal pad between the extruded squares and the exposed copper on the back of the PCB or have them contact it directly (maybe with a little bit of thermal paste)?

With that design will you use something on/with the screws for mechanical support to help keep the heatsink in thermal contact with the pads?  Perhaps like an aluminum standoff or insert from McMaster carr, or extrude aluminum there and tap a hole?  Are the holes threaded already?

BkkCoins pointed some things out in his thread so the design is changing to flat, with CNC'd recesses for the PCIE thru-hole connection. This design would have connected directly to the copper w/ paste.

The holes in the center of each group of chips are tapped for a m3 screw. W/ or w/out a spring is TBD.
sr. member
Activity: 322
Merit: 250
May 25, 2013, 10:02:41 PM
#37


questions, comments, concerns?
Looks like a good design.  Are you planning on using a thermal pad between the extruded squares and the exposed copper on the back of the PCB or have them contact it directly (maybe with a little bit of thermal paste)?

With that design will you use something on/with the screws for mechanical support to help keep the heatsink in thermal contact with the pads?  Perhaps like an aluminum standoff or insert from McMaster carr, or extrude aluminum there and tap a hole?  Are the holes threaded already?
legendary
Activity: 2674
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Legendary Escrow Service - Tip Jar in Profile
May 25, 2013, 05:41:05 AM
#36
So from Avalon website the dimensions of the chips are 7 mm x 7 mm

Can you give me a link? Im in the process to find out what packaging i need to spread the asics to buyers. Till now i thought the chips will come on a roll but burnin now said he thinks they will come in tubes. I need to know this in order to order the needed packaging...
Sebastian, go to github avalon release, there is chip packaging and dimensions.

Thanks... i thought that is only for building it... i now found the pdf (https://github.com/BitSyncom/avalon-ref/tree/master/PDF) with the measures of the chips... unfortunately i dont find info about how the chips are shipped... in which form. So that i know what packaging i have to buy.
sr. member
Activity: 476
Merit: 250
May 25, 2013, 05:30:54 AM
#35
So from Avalon website the dimensions of the chips are 7 mm x 7 mm

Can you give me a link? Im in the process to find out what packaging i need to spread the asics to buyers. Till now i thought the chips will come on a roll but burnin now said he thinks they will come in tubes. I need to know this in order to order the needed packaging...
Sebastian, go to github avalon release, there is chip packaging and dimensions.
legendary
Activity: 2674
Merit: 1083
Legendary Escrow Service - Tip Jar in Profile
May 25, 2013, 05:00:41 AM
#34
So from Avalon website the dimensions of the chips are 7 mm x 7 mm

Can you give me a link? Im in the process to find out what packaging i need to spread the asics to buyers. Till now i thought the chips will come on a roll but burnin now said he thinks they will come in tubes. I need to know this in order to order the needed packaging...
hero member
Activity: 924
Merit: 1000
May 25, 2013, 01:49:35 AM
#33
OK this is what I would do.  So from Avalon website the dimensions of the chips are 7 mm x 7 mm so I would opt out for individual heatsinks like this one http://www.newegg.com/Product/Product.aspx?Item=N82E16835708011 or http://www.newegg.com/Product/Product.aspx?Item=N82E16835708012.  The first one is 6.5mm and the latter is 10mm.  They are designed to cool video car memory so I think they would be suitable for avalon chips.

How many fans can be powered? Check the board design... looks like a single 3 pin for 1 fan right? So doing that might not be ideal. I agree with the 1 larger heat sink properly mounted will give you the maximum heat dissipation. Raised or not let us see what BKKCOins comes up with in his tests. I will be sending him 4 heat sinks for testing. Ignore the oversized heat sinks I am shipping as BKKCOINS will mod them to suit his plan but you can use the dimension and spacing for the fins to give you an idea when his test results come out.

https://109.201.133.65/index.php?topic=210635.msg2223916#msg2223916

He will mod them how he thinks and give us all feedback. I am loving the CNC idea and I hope that won't  add too much to my costs here in Indonesia if your design is best steamboart. Fans need some sort of attach point right? Top down blowing directly like a CPU?
hero member
Activity: 648
Merit: 500
May 24, 2013, 10:06:23 PM
#32
OK this is what I would do.  So from Avalon website the dimensions of the chips are 7 mm x 7 mm so I would opt out for individual heatsinks like this one http://www.newegg.com/Product/Product.aspx?Item=N82E16835708011 or http://www.newegg.com/Product/Product.aspx?Item=N82E16835708012.  The first one is 6.5mm and the latter is 10mm.  They are designed to cool video car memory so I think they would be suitable for avalon chips.

This approach has been discussed before. They are not as efficient at dissipating heat, cannot be secured well, and are insanely expensive.
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