750 GH/s - 3TH/s Miners from $3565 - www.bitcoinultra.co.uk

[raskul]

Those heatsinks seem a little short for 250GH @ 8x A1 chips per board. What temps and power at the wall are you getting?

I'd be interested to buy them without a case and stack them with a big silent 120mm fans directly on the heatsink!

Any chance we can buy it in kit form minus the cost of case, fan, and labour?

compare;

http://ecointalk.net/gallery/image/315-img-20140402-131136-2-resize/

^Black Arrow (gallery showing everything but the ASIC - i'm still dubious).

[raskul]

AND THERE ENDETH THE LESSON.

thanks pete.

[Gator-hex]

Well if they are Dragon miner v1 boards, they weren't designed to run beyond 200GH so beware!

The Dragon Miner v2, which was designed to run at 250GH, has bigger heatsinks, different to those shown.

Will get a psu now so maybe 1h or so if i fix it before work.

looks nice!

[Caesium]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

There ya go, there's a home inventor's mission laid out for them - produce aftermarket heatsinks for dragon rigs with the fins vertical, sell for $20 each.

Just need a little induction furnace to remelt aluminum scrap, CNC a mold positive, mold container to house the sand, some sand, stationary grinder and away you go.

Welcome to my new business venture! Send me your heatsinks and I will send you vertically aligned replacements!

(Please note: the heatsinks you get back may or may not be the same heatsinks rotated by 90 degrees in the envelope).

[dogie]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

tl;dr: nope.

[raskul]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

There ya go, there's a home inventor's mission laid out for them - produce aftermarket heatsinks for dragon rigs with the fins vertical, sell for $20 each.

Just need a little induction furnace to remelt aluminum scrap, CNC a mold positive, mold container to house the sand, some sand, stationary grinder and away you go.

Welcome to my new business venture! Send me your heatsinks and I will send you vertically aligned replacements!

(Please note: the heatsinks you get back may or may not be the same heatsinks rotated by 90 degrees in the envelope).

Sure, take the easy route.
LOL

^same business model as bitcoinultra though!

[MrTeal]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

tl;dr: nope.

You disagree with the physics of convection?

Convection (and radiation) play a very reduced roll in a forced air situation. You don't need convection to move air across the fins with forced air, so you orient them whichever way is optimized to the airflow from the fans.

[raskul]

my old blades have not much in the way of heatsinks whatsoever, in fact, i could probably get away with having a simple copper plate against the asics, as such as they are positioned, against a slightly opened window with the fans blowing cold air in at them. I'm seeing around 14% increase in efficiency on my entire rig, because of this. hence the reason I have a pile of empty cases and boxes in the corner of the room.. anything in a case, for me, just restricts the cooling I can give.

[Gator-hex]

Can somebody post a miner screenshot, or even better a video of it running?

[freebit13]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

tl;dr: nope.

You disagree with the physics of convection?

Convection (and radiation) play a very reduced roll in a forced air situation. You don't need convection to move air across the fins with forced air, so you orient them whichever way is optimized to the airflow from the fans.

Yes, you are correct. 25 years computer tech, 30 years programming.

My posts were meant as tongue-in-cheek folly, but I understand if they were not perceived that way.

Is all good.

If you'd offered your product for pre-order sooner, you might have managed to take some suckers before being 'busted' by Dogie 

[dogie]

Looking at those heatsinks, one has to wonder if anyone who designs these things understands physics.

Why not design the fins to be vertical instead of horizontal, they would release so much more heat and create a constant smooth current of air flowing vertically through the fins.

tl;dr: nope.

You disagree with the physics of convection?

Convection (and radiation) play a very reduced roll in a forced air situation. You don't need convection to move air across the fins with forced air, so you orient them whichever way is optimized to the airflow from the fans.

Yes, you are correct. 25 years computer tech, 30 years programming.

My posts were meant as tongue-in-cheek folly, but I understand if they were not perceived that way.

Is all good.

If you'd offered your product for pre-order sooner, you might have managed to take some suckers before being 'busted' by Dogie 

Eh? What have I done now

[zomtekon]

I will post soon as soon it's clears customs. They want me to fill out about 20 forms GRRRRRRR.

[gyntas]

Will get a psu now so maybe 1h or so if i fix it before work.

http://s25.postimg.org/d5w9thv8v/IMG_1246.jpg

looks nice!

Might wanna push that white USB cable all the way in before you start it up.

 Hi,wich PSU need get for this miner  .Thanks

[landy]

PSU that support 4x 10pin contact.
min 750watt

[raskul]

PSU that support 4x 10pin contact.
min 750watt

He means 4x 8/6+2 Pin PCI-E.
On separate cables would be best (shared cables might melt as they were designed for 300W not 500W!)
I'm still not convinced these have big enough heatsinks to run 250GH for a long period of time though. No mining video yet?

perhaps those who have received have already burned down their houses with them 

[Biffa]

Any news on these machines?
Likes?
Dislikes?
Reviews?
Thoughts?
Complaints?
Praises?
Other information?

I believe the intial batch were faulty and that a new one is being shipped.

[zomtekon]

Just got my unit today can't log in  to the raspberry pi to start mining tried U: pi P: raspberry says wrong log in and the ips at 256 so wont work on my router any one know the user and pass or how to set up this thing 

[zomtekon]

Does anyone know how to use this

[zomtekon]

DO NOT BUY can't log on to the PI. Fans don't work; screws are missing or not screwed in all the way in. on the pcb one of the boards 4 flashing red lights no support from bitcoinultra

[raskul]

DO NOT BUY can't log on to the PI. Fans don't work; screws are missing or not screwed in all the way in. on the pcb one of the boards 4 flashing red lights no support from bitcoinultra

we all suspected something like this may happen. sorry for your loss.