vs3 (OP)
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November 20, 2013, 11:16:55 PM |
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vs3, can you tell us about the heat of the chips, without any dissipation layer, how much temperature rises? I happened to make a big hole in the GND pad and once the bitfury soldier is padded on the backside with tin or thermal compound to insert a rear heatsink.
I had the sample boards that I made over the weekend run for a while without any heatsink on the back - just using the entire copper backside as a heatsink. They worked just fine at 50 bits speed (and I also let them run for a while at 51 and they worked fine too but I didn't let them run for long enough to be certain). Also - keep in mind that the chips are not the only heat source. Chips produce about 80-85% of all the heat, but also the coil and regulator produce another 15-20% too. So heatsink on the back side helps them as well. What we know for sure is that the bitfury chips can take a lot of beating - and I mean A LOT : Chips have been tested to run at extreme temperatures. One user used a soldering iron to heat the chip to the point it desoldered. Hashing stopped only when chip started floating on solder and shortcircuited.
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IchibahnSLC
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November 24, 2013, 09:37:51 PM |
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Anyone know the best place to buy the bitfury chips in bulk?
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Swimmer63
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November 24, 2013, 10:07:38 PM |
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Anyone know the best place to buy the bitfury chips in bulk?
BuzzDave at Megabigpower.com. Got a small order in 2 days. I think he has like 1500 on hand.
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IchibahnSLC
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November 25, 2013, 02:28:20 AM |
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Anyone know the best place to buy the bitfury chips in bulk?
BuzzDave at Megabigpower.com. Got a small order in 2 days. I think he has like 1500 on hand. I was hoping for a better price with an order of 50 or so. I pm'd me but he didn't really give any specifics.
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Swimmer63
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November 25, 2013, 03:12:53 AM |
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Anyone know the best place to buy the bitfury chips in bulk?
BuzzDave at Megabigpower.com. Got a small order in 2 days. I think he has like 1500 on hand. I was hoping for a better price with an order of 50 or so. I pm'd me but he didn't really give any specifics. No you have to be in the stratosphere before there is a discount. Like 3000 or more.
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rgr_rgr
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November 27, 2013, 09:55:36 PM |
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Seems to be sold out. Any other source?
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stan258
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November 27, 2013, 10:28:38 PM |
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I am willing to pay a decent fair market price for any. Please PM me if you need some extra cash or coin. Ideally I would like to get as many as possible.
------Dave is out. I believe I took his last one. Waiting for FedEx now.
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IchibahnSLC
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November 27, 2013, 10:57:24 PM |
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I am willing to pay a decent fair market price for any. Please PM me if you need some extra cash or coin. Ideally I would like to get as many as possible.
------Dave is out. I believe I took his last one. Waiting for FedEx now.
I'm waiting for FedEx as well.
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drinkmorecoffee
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December 12, 2013, 05:05:09 PM |
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I am willing to pay a decent fair market price for any. Please PM me if you need some extra cash or coin. Ideally I would like to get as many as possible.
------Dave is out. I believe I took his last one. Waiting for FedEx now.
I'm waiting for FedEx as well. He said in an e-mail that he's restocking in February. Preorders available at $5/chip, but in 3000-chip batches. Unknown as of yet if we can order individuals or small batches from the website again when he finally restocks. Hope so...
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stan258
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December 12, 2013, 06:41:20 PM |
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I wonder why so long between runs?
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Taugeran
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December 12, 2013, 07:33:44 PM |
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I wonder why so long between runs?
manufacturing of the chips is like waiting in line at a gov't office.....long wait
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Bitfury HW & Habañero : 1.625Th/s tips/Donations: 1NoS89H3Mr6U5CmP4VwWzU2318JEMxHL1 Come join Coinbase
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Swimmer63
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December 12, 2013, 09:59:27 PM |
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Is it possible to do a USB miner with a BFL chip? I am guessing no since no one has done it and they are much more readily available than BF.
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drinkmorecoffee
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December 12, 2013, 11:29:49 PM |
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Is it possible to do a USB miner with a BFL chip? I am guessing no since no one has done it and they are much more readily available than BF.
Might be possible, but with the BGA packaging they used makes them a lot harder to work with than the more hand-solder friendly packages like TQFP (with the leads sticking out the sides). Plus, BFL lists the chips as out of stock, so I imagine you'd have to buy them from someone who has them stocked up just like BitFury.
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bitly
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December 13, 2013, 01:37:27 AM |
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Is it possible to do a USB miner with a BFL chip? I am guessing no since no one has done it and they are much more readily available than BF.
Might be possible, but with the BGA packaging they used makes them a lot harder to work with than the more hand-solder friendly packages like TQFP (with the leads sticking out the sides). Plus, BFL lists the chips as out of stock, so I imagine you'd have to buy them from someone who has them stocked up just like BitFury. The BFL chips uses 3.2 W/GH/s so that's 12.8 W/chip for the 4GH/s chip. That doesn't fall within current USB specs but may be possible in the future.
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vs3 (OP)
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December 13, 2013, 09:01:28 PM |
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Is it possible to do a USB miner with a BFL chip? I am guessing no since no one has done it and they are much more readily available than BF.
Might be possible, but with the BGA packaging they used makes them a lot harder to work with than the more hand-solder friendly packages like TQFP (with the leads sticking out the sides). Plus, BFL lists the chips as out of stock, so I imagine you'd have to buy them from someone who has them stocked up just like BitFury. The BFL chips uses 3.2 W/GH/s so that's 12.8 W/chip for the 4GH/s chip. That doesn't fall within current USB specs but may be possible in the future. yup - that pretty much sums it up. As people already mentioned it - there are 2 major issues when considering it for a USB miner: #1 - package is too big and cooling requirements are just too much of a pain for a USB miner (BF produces 2-3W of heat, BFL is well over 10W) #2 - most importantly BFL chip consumes MUCH MUCH MORE power than the 2.5W that USB2 can provide. Although it is probably possible to make an externally-powered big device that has fans for dealing with the extra cooling, etc, etc - that would sort of defeat the purpose of the simplicity that you get with a USB miner.
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bitly
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December 16, 2013, 07:41:21 AM |
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BitMain?
May be an interesting option. Could conceivably fit 3 bitmain chips on a stick
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Mudbankkeith
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December 20, 2013, 07:47:38 PM |
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Is it possible to do a USB miner with a BFL chip? I am guessing no since no one has done it and they are much more readily available than BF.
Might be possible, but with the BGA packaging they used makes them a lot harder to work with than the more hand-solder friendly packages like TQFP (with the leads sticking out the sides). Plus, BFL lists the chips as out of stock, so I imagine you'd have to buy them from someone who has them stocked up just like BitFury. The BFL chips uses 3.2 W/GH/s so that's 12.8 W/chip for the 4GH/s chip. That doesn't fall within current USB specs but may be possible in the future. yup - that pretty much sums it up. As people already mentioned it - there are 2 major issues when considering it for a USB miner: #1 - package is too big and cooling requirements are just too much of a pain for a USB miner (BF produces 2-3W of heat, BFL is well over 10W) #2 - most importantly BFL chip consumes MUCH MUCH MORE power than the 2.5W that USB2 can provide. Although it is probably possible to make an externally-powered big device that has fans for dealing with the extra cooling, etc, etc - that would sort of defeat the purpose of the simplicity that you get with a USB miner. The external power is already available(plenty of 12v & 5v on one of these) https://www.dropbox.com/s/dpjtcouau6ah0kj/2013-11-02%2012.41.13.jpgand connected:- https://www.dropbox.com/s/x8ho5djfthq0a7u/2013-11-02%2010.26.41.jpg
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BTc donations welcome:- 13c2KuzWCaWFTXF171Zn1HrKhMYARPKv97
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MagicMan187
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December 21, 2013, 02:10:38 PM |
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I got a few of these, they run great!
Can you provide detailed instructions on overlocking?
I can't find no info online on the pencil mod for the nano fury. How do I got about doing this? Can you provide pictures with annotations?
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