HashFast launches sales of the Baby Jet

[DeathAndTaxes]

What kind payment Hashfast take or Bitpay only?

Thank you.

They also accept bank wires.

[1714890678]

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[1714890678]

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[cypherdoc]

Yeah it does seem confusing.   I can't see any reason for the second power supply.

One new thing is notice the usb port above the left power supply.  It looks like it connects to one of the boards.  So single usb port to board #1 and the boards 2 & 3 daisy chained off it.

As for a 4th module you could certainly mount a board but where are you going to put the watercooling radiator?



HF is the same water cooling radiator used for BabyJet with obviously only 1 used (2 if upgrade module is installed)?

i was looking at the specs of the 2 psu's last Monday and the combined wattage greatly exceeded that needed for 3 modules which i calculated somewhere around 1400W.  while briefly cruising around the Seasonic website i noted that i didn't see any single platinum 80 plus psu above this, am i wrong?

I would certainly hope the Sierra doesn't require 1400W DC.  That would be ~1500W AC and would make the efficiency worse than 1.2 J/GH.  Given that 55nm Bitfury does less than 0.9 J/GH at the wall and KNC does less than 1.1 J/GH I would be hoping for something more.

The stated efficiency of BabyJet is 350W at the wall or 0.88 J/GH.  Assume a 90% efficienct PSU that would mean 350W AC is 315W DC.  Three times that is ~950W DC.   Seems that either a single 1000W Platinum or 1250W Gold PSU should be fine.

For the record, at the high end SeaSonic only has 860W & 1000W PSU Platinum models and 860W, 1000W, and 1250W Gold models.

One edit:
one thing I hadn't considered is that HF may be saving cost by using a single model PSU across products.   Say the BabyJet comes with 660W PSU.  Rather than stock a different model the Sierra comes with 2x 660W PSUs.  Note the above is just my theorizing.

i meant at the wall OC'd.  i might not have the #'s quite right.

[DeathAndTaxes]

I like the idea of Dual PSU, especially for expansion and failover

Well failover implies each PSU can handle the full load and that isn't confirmed.   Expansion is improbable given the dimensions of the chassis.   To their credit HF used the available space pretty well.  I don't see you putting another module plus fan/radiator/pump combo in there without extensive redesign.  Might be an interesting project.

[bobsag3]

I like the idea of Dual PSU, especially for expansion and failover

Well failover implies each PSU can handle the full load and that isn't confirmed.   Expansion is improbable given the dimensions of the chassis.   To their credit HF used the available space pretty well.  I don't see you putting another module plus fan/radiator/pump combo in there without extensive redesign.  Might be an interesting project.

They may not include 2 large enough PSUs, but it looks like you could upgrade the PSUs to be big enough. Its hard to tell without hard numbers, or MPP/non-mpp

[regular]

Those coolers look like the Corsair ones made by CoolIT.



I guess Cointerra is using the same system as Hashfast?

[DeathAndTaxes]

Makes sense is it is reasonably powerful unit (for off the shelf stock) and it is self cointained which makes bulk assembly easier.   Still I do hope HF makes "naked boards" available.   The H80i isn't exactly cheap at $80.  Even if HF is getting an unbranded version for coolit for say $60 each there are three and that is a significant cost point to the total sytstem cost.  I guesstimate the case at $60.  If the power supply is 2x 660W they are $150 ea (if larger it will be even more).  Toss in two intake fans at lets say $10 ea.   So the balance of system cost in a Sierra the non-ASIC costs is are something like $600 (60 x 3 + $60 + $150 x 2 + $10 x2 = $560, round up to $600 for reduced labor and packaging).  Sierra's current pricing w/o MPP is $6,300 so knock $600 off and it would be ~$5,700 for 3 naked modules or $1,900 ea (maybe $1,500 ea in bulk)?   Sell them as naked modules and let the community come up with innovative solutions.

[cypherdoc]

Makes sense is it is reasonably powerful unit (for off the shelf stock) and it is self cointained which makes bulk assembly easier.   Still I do hope HF makes "naked boards" available.   The H80i isn't exactly cheap at $80.  Even if HF is getting an unbranded version for coolit for say $60 each there are three and that is a significant cost point to the total sytstem cost.  I guesstimate the case at $60.  If the power supply is 2x 660W they are $150 ea (if larger it will be even more).  Toss in two intake fans at lets say $10 ea.   So the balance of system cost in a Sierra the non-ASIC costs is are something like $600 (60 x 3 + $60 + $150 x 2 + $10 x2 = $560, round up to $600 for reduced labor and packaging).  Sierra's current pricing w/o MPP is $6,300 so knock $600 off and it would be ~$5,700 for 3 naked modules or $1,900 ea (maybe $1,500 ea in bulk)?   Sell them as naked modules and let the community come up with innovative solutions.

i think that's in the works.

[Wesly]

Yeah it does seem confusing.   I can't see any reason for the second power supply.

One new thing is notice the usb port above the left power supply.  It looks like it connects to one of the boards.  So single usb port to board #1 and the boards 2 & 3 daisy chained off it.

As for a 4th module you could certainly mount a board but where are you going to put the watercooling radiator?

HF is the same water cooling radiator used for BabyJet with obviously only 1 used (2 if upgrade module is installed)?

CoolIT has already developed dual processor liquid cooling system back in 2010 that can dissipate up to 900 watts of heat.  2 of them should be able to fit in the new 4U chassis.  With Overclock performance of over 500 GH per chips (according to Simon's post in the other thread) that is 2TH in a single box, same as Cointerra's TerraMiner IV...  Speaking of which, you can see Cointerra's new 3D renderings of their 4U case design and see they use 1 large radiator to cool 2 ASIC chips.   One can only dream!

       http://www.bit-tech.net/news/industry/2010/04/16/coolit-systems-provides-dual-cpu-liquid-coo/1

       "EPIC 180 X2 CLOSED-LOOP WATER COOLING
     Added to the mix is our exclusive EPIC 180 X2 closed-loop, maintenance-free, 50,000 hour watercooling solution. Able to dissipate up to 900 watts of heat from two processors"

          

[xstr8guy]

I like the idea of Dual PSU, especially for expansion and failover

A Seasonic PSU would be the last thing to fail in this or any miner.  I can almost guarantee you that HF aren't using two for failover purposes.

[Amy Woodward]

I like the idea of Dual PSU, especially for expansion and failover

A Seasonic PSU would be the last thing to fail in this or any miner.  I can almost guarantee you that HF aren't using two for failover purposes.

Correct, we're not using two for failover purposes, we're using two because we chose to provide a 20% safety margin on top of what the Sierra might need. 

For our mining rigs we have chosen to specify power supplies that are rated 20% higher than the highest wattage we expect even including significant overclocking. The GN chip uses 250W at nominal, and we have designed all the systems to handle upto 350W. When the mini motherboard is supplying 350W to the chip (this level of overclock should result in up to 540GH/s) the mini motherboard may consume up to 411W of 12v, due to losses in the VRM. Add 25W for fans, and you get to 436W per mini-motherboard. Multiply by 3 chips in the Sierra, and you get about 1300W. We've added a safety margin of 20% extra on top of this - so we needed power supplies that were rated to a minimum of 1560W @ 12v to meet these specifications, and maintain the headroom and margin we desired to ensure reliable, efficient long term operation.

There are very few manufacturers who make single 1600W supplies, and we didn't find a single unit from a high quality vendor.

[cypherdoc]

I like the idea of Dual PSU, especially for expansion and failover

A Seasonic PSU would be the last thing to fail in this or any miner.  I can almost guarantee you that HF aren't using two for failover purposes.

Correct, we're not using two for failover purposes, we're using two because we chose to provide a 20% safety margin on top of what the Sierra might need. 

For our mining rigs we have chosen to specify power supplies that are rated 20% higher than the highest wattage we expect even including significant overclocking. The GN chip uses 250W at nominal, and we have designed all the systems to handle upto 350W. When the mini motherboard is supplying 350W to the chip (this level of overclock should result in up to 540GH/s) the mini motherboard may consume up to 411W of 12v, due to losses in the VRM. Add 25W for fans, and you get to 436W per mini-motherboard. Multiply by 3 chips in the Sierra, and you get about 1300W. We've added a safety margin of 20% extra on top of this - so we needed power supplies that were rated to a minimum of 1560W @ 12v to meet these specifications, and maintain the headroom and margin we desired to ensure reliable, efficient long term operation.

There are very few manufacturers who make single 1600W supplies, and we didn't find a single unit from a high quality vendor.

Now that's the real definition of margins on margins.

[HashFast_CL]

I like the idea of Dual PSU, especially for expansion and failover

A Seasonic PSU would be the last thing to fail in this or any miner.  I can almost guarantee you that HF aren't using two for failover purposes.

Correct, we're not using two for failover purposes, we're using two because we chose to provide a 20% safety margin on top of what the Sierra might need. 

You say "20% safety margin" and I think "20% overclocking margin."   

[DeathAndTaxes]

Thanks for all the technical details Simon it certainly clears up a lot of stuff.   I agree on the choice of PSU vendor.  Used SeaSonics to power a GPU farm and they worked flawlessly at high load in brutal conditions.

BTW any plans to sell just "naked boards"?

[cypherdoc]

I like the idea of Dual PSU, especially for expansion and failover

A Seasonic PSU would be the last thing to fail in this or any miner.  I can almost guarantee you that HF aren't using two for failover purposes.

Correct, we're not using two for failover purposes, we're using two because we chose to provide a 20% safety margin on top of what the Sierra might need. 

You say "20% safety margin" and I think "20% overclocking margin."   

i highly doubt they are going to take half of the psu's out just before delivery to save money.

[dopamine]

I feel like hashfast should do refunds if they cant ship on their deadline specially with the  network difficulty soaring or ship with MPP when they do ship. HASHFAST HOW MUCH LONGER?

[crumbs]

I feel like hashfast should do refunds if they cant ship on their deadline specially with the  network difficulty soaring or ship with MPP when they do ship. HASHFAST HOW MUCH LONGER?

I think that's why so many people were making a fuss about the lack of PP/CC payment options.  Hashfast's terms explicitly state that refunds will not be honored before Jan. 1st, 2014.

[winit]

I think it's time we had a Sierra specific thread... not for continuous griping about the probable lateness of the units but enable defined discussion on the product

[cypherdoc]

http://www.prweb.com/releases/2013/10/prweb11245642.htm

[cypherdoc]

http://www.prweb.com/releases/2013/10/prweb11245642.htm

i'm trying to find out exactly what "sign deal" means in terms of exclusivity.

sounds to me like "no other ASIC manufacturer will be allowed to purchase Seasonic PSU's in bulk for Bitcoin mining".

hence higher costs and lower quality for competitors.

[mgio]

I feel like hashfast should do refunds if they cant ship on their deadline specially with the  network difficulty soaring or ship with MPP when they do ship. HASHFAST HOW MUCH LONGER?

I think that's why so many people were making a fuss about the lack of PP/CC payment options.  Hashfast's terms explicitly state that refunds will not be honored before Jan. 1st, 2014.

Legally, they actually have to give you a refund at any time before they ship if they deliver more than 6 weeks (not sure of the exact time) after ordering, unless they can give you an exact ship date.

The problem with paying by bitcoin is good luck in forcing them to give you a refund like you can if you paid by credit card.