[SUPPORT THREAD] BFx2 Bitfury USB stick miner

[2121]

Thanks ckolivas,
Will it also work with any other currency? How can I confirm before buying?

[TheRealSteve]

( Note that this has seen some massive price drops the past few days, possibly due to the BTC exchange rate falling -  one reseller has them for $55 )

[stex2009]

( Note that this has seen some massive price drops the past few days, possibly due to the BTC exchange rate falling -  one reseller has them for $55 )

anyone selling these in bulk (USA) ?

[TheRealSteve]

( Note that this has seen some massive price drops the past few days, possibly due to the BTC exchange rate falling -  one reseller has them for $55 )

anyone selling these in bulk (USA) ?

If they are, they should be posting here and/or telling goodney that it's OK to post their info

Of course, if you...

Fancy being a reseller of Bitfury Twin chip & future dev's for America & Canada?
pm [kevinm] for details,

[bobsag3]

I looked into it but the price I was quoted for bulk batches - much to high compared to other products.

[klintay]

( Note that this has seen some massive price drops the past few days, possibly due to the BTC exchange rate falling -  one reseller has them for $55 )

anyone selling these in bulk (USA) ?

I am selling bulk to anywhere in the world. We can arrange DHL if you want. Please check out my site:

www.eyeboot.com

[stex2009]

Do these run pretty stable at 4 ghs using 2.5 watt? (If I run these with a fan on AM original 49 port hub)

[goodney]

Do these run pretty stable at 4 ghs using 2.5 watt? (If I run these with a fan on AM original 49 port hub)

They are very stable at 4GH/s, but to get to 4GH/s they'll draw 5W with --clock-bits=54. With a fan you'll have no stability problems.

[xingqiaoyin]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

[klintay]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

No they do at least i have test some which did
After i pencil modded them, see video here on how to do it:

http://youtu.be/jm0U3p_C9og

[Luke-Jr]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

[klintay]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

definitely...any news on the bfgminer support? 

[TheRealSteve]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

Unless that damage is in the form of scratching up the port because of https://i.imgur.com/8cEBpMB.png , that laptop would have to be returned under warranty and not accepted back.  Proper USB ports don't care about 'too much' current draw.. either they'll sag in voltage in response to the point where the overcurrent situation dies off, or they just plain shut down (either through a passive 'fuse' or through active management).
above does not apply to any miners that accept external power - that has to be isolated properly from the host device

[Luke-Jr]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

definitely...any news on the bfgminer support? 

Still waiting on goodney..

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

Unless that damage is in the form of scratching up the port because of https://i.imgur.com/8cEBpMB.png , that laptop would have to be returned under warranty and not accepted back.  Proper USB ports don't care about 'too much' current draw.. either they'll sag in voltage in response to the point where the overcurrent situation dies off, or they just plain shut down (either through a passive 'fuse' or through active management).
above does not apply to any miners that accept external power - that has to be isolated properly from the host device

Have you seen any proper USB hosts/hubs?

[TheRealSteve]

There's at least a risk that you damage the laptop.

Unless that damage is in the form of scratching up the port because of https://i.imgur.com/8cEBpMB.png , that laptop would have to be returned under warranty and not accepted back.  Proper USB ports don't care about 'too much' current draw.. either they'll sag in voltage in response to the point where the overcurrent situation dies off, or they just plain shut down (either through a passive 'fuse' or through active management).
above does not apply to any miners that accept external power - that has to be isolated properly from the host device

Have you seen any proper USB hosts/hubs?

Amazingly, so far, all but one - in a supercheap hub where eventually the Vreg died
Maybe I just got lucky.. share your horror stories!

[xingqiaoyin]

So  these wont run to 4ghs plugged straight into a laptop usb port ?

There's at least a risk that you damage the laptop.

I see so practically this wont run from a mobo or laptop yes ? You need powered USB hub ?

[goodney]

I see so practically this wont run from a mobo or laptop yes ? You need powered USB hub ?

Yes, you need a powered USB hub. If you want to run a lot of them, klintay has a 49 port hub sale (which will support 28 of these units physically). His thread is here: https://bitcointalk.org/index.php?topic=528371

I've also had good luck running this hub: http://www.amazon.com/HooToo%C2%AE-HT-UH009-Backward-Compatible-Supporting/dp/B00FVS9U8O/ plugged into a USB 2 port

[stex2009]

I've also had good luck running this hub: http://www.amazon.com/HooToo%C2%AE-HT-UH009-Backward-Compatible-Supporting/dp/B00FVS9U8O/ plugged into a USB 2 port

Did you run full capacity on this hub?

[goodney]

Did you run full capacity on this hub?

I run with 5 miners in each hub. But I'm switching to the 49 port hub as soon as it arrives.

[fydel]

Nice units. 

But I am curious what are the four LEDs for?