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Title: Bitfury H board Heatsinks Post by: AMD FTW on November 16, 2013, 09:17:02 PM Is there any interest for custom heatsinks for our H boards. I've sourced a manufacturer that will make a 4" x 4" aluminum heatsink anodized black and I can provide 3m thermal adhesive tape. I have to order at least 400 units or so and they'd take 1-2 weeks to be made up. Let me know if there's interest as I plan on setting this up possibly Monday or Tuesday this week. I'll see how much more it would be to rush the order or if they'd even allow it.
Cost Estimate Full M board populated would run $180 ($11.25 a board)+shipping Individual cards I'm thinking $16+shipping Payment could be in BTC, LTC, PPC Title: Re: Bitfury H board Heatsinks Post by: klondike_bar on November 16, 2013, 09:36:21 PM how tall are the heatsinks? Ive been using 4 35x35x6mm heatsinks without issue, and at a cost closer to ~$7 per board
IMO, you only need to focus the heatsinks on the thermal vias. The 35x35mm size is perfect for covering 4 chips without covering too much of the unheated areas of the PCB. Also, the thermal vias for the regulator are VERY important to cool. Copper would be the ideal for just that component, aluminum for the rest. Title: Re: Bitfury H board Heatsinks Post by: AMD FTW on November 16, 2013, 09:55:39 PM how tall are the heatsinks? Ive been using 4 35x35x6mm heatsinks without issue, and at a cost closer to ~$7 per board IMO, you only need to focus the heatsinks on the thermal vias. The 35x35mm size is perfect for covering 4 chips without covering too much of the unheated areas of the PCB. Also, the thermal vias for the regulator are VERY important to cool. Copper would be the ideal for just that component, aluminum for the rest. The idea was one big heatsink for that covers all the chips, and then a small copper one for the regulator. The heatsink would probably be close to 8mm in height once the 3m tape is applied. I'm still trying to source cheaper thermal adhesive tape. 2 Rolls of this 3m thermal stuff is around 1,000. If there's not enough interest then I'll probably just buy 1.5 x 1.5 heatsinks already made with thermal tape which is about $2 each and either stick 4 or more on if I decide I want them to overhang a bit. Title: Re: Bitfury H board Heatsinks Post by: tom99 on November 17, 2013, 06:25:31 PM how tall are the heatsinks? Ive been using 4 35x35x6mm heatsinks without issue, and at a cost closer to ~$7 per board IMO, you only need to focus the heatsinks on the thermal vias. The 35x35mm size is perfect for covering 4 chips without covering too much of the unheated areas of the PCB. Also, the thermal vias for the regulator are VERY important to cool. Copper would be the ideal for just that component, aluminum for the rest. The idea was one big heatsink for that covers all the chips, and then a small copper one for the regulator. The heatsink would probably be close to 8mm in height once the 3m tape is applied. I'm still trying to source cheaper thermal adhesive tape. 2 Rolls of this 3m thermal stuff is around 1,000. If there's not enough interest then I'll probably just buy 1.5 x 1.5 heatsinks already made with thermal tape which is about $2 each and either stick 4 or more on if I decide I want them to overhang a bit. I dont understand why not drill holes for heatsink and easy to remove heatsink later. Title: Re: Bitfury H board Heatsinks Post by: tarmi on November 18, 2013, 12:17:53 AM yes indeed. why tape, why dont drill some holes?
Title: Re: Bitfury H board Heatsinks Post by: allinvain on November 18, 2013, 03:31:00 AM Is there any interest for custom heatsinks for our H boards. I've sourced a manufacturer that will make a 4" x 4" aluminum heatsink anodized black and I can provide 3m thermal adhesive tape. I have to order at least 400 units or so and they'd take 1-2 weeks to be made up. Let me know if there's interest as I plan on setting this up possibly Monday or Tuesday this week. I'll see how much more it would be to rush the order or if they'd even allow it. Cost Estimate Full M board populated would run $180 ($11.25 a board)+shipping Individual cards I'm thinking $16+shipping Payment could be in BTC, LTC, PPC This is far too expensive. One can buy batches of bags of hundreds of heatsinks (the aluminum ones) for around $40 on ebay. Title: Re: Bitfury H board Heatsinks Post by: ericdc30 on November 18, 2013, 04:45:06 AM Is there any interest for custom heatsinks for our H boards. I've sourced a manufacturer that will make a 4" x 4" aluminum heatsink anodized black and I can provide 3m thermal adhesive tape. I have to order at least 400 units or so and they'd take 1-2 weeks to be made up. Let me know if there's interest as I plan on setting this up possibly Monday or Tuesday this week. I'll see how much more it would be to rush the order or if they'd even allow it. Cost Estimate Full M board populated would run $180 ($11.25 a board)+shipping Individual cards I'm thinking $16+shipping Payment could be in BTC, LTC, PPC I am interested I have a full rig no heat sinks. Any chance we could get copper? |