Post
Topic
Board Hardware
Re: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs
by
aerobatic
on 23/07/2014, 22:25:32 UTC
Couple days (From YOUR quote) is not within 2 weeks...  Think before you speak please...  I don't doubt they will be here before the 9th, but AFTER the news today you made that post.  Bitcoinarama says what?

No need to quote my full post.

Ok a maximum of 2 weeks seems reasonable considering the latest news and it's still on time for their August batch so I'm happy!

If SP has got asics back that arent running at the same power consumption as they expected from their simulations, they certainly wont be the first asic company to have befallen this problem.  actually the problem is endemic and they cant all be doing it wrong !  perhaps there's something about sha-256 asic designs that cause them to somehow require much higher power consumption than the asic simulations indicate (extreme toggle rates etc).. and it seems theyre not alone in this category (cointerra, bfl, kncminer, asicminer etc).  in fact, i dont know anyone who hasnt significantly underestimated their power consumption from simulation to reality (yes, even the mighty bitfury labelled each chip as 5 GH and when they arrived, they did 2.5 GH).

the knock on effect of the asics requiring more power is that in order to run the asics at the same power and thermal envelope to fit in the box that youve designed, you have to under-volt them, and when running at less voltage than they intended the knockon effect is you get less hash rate than you expected (clockspeed is proportional to voltage).  And due to the pre-order process, you dont find out until just before you ship, which means youre guaranteed to disappoint pre-order customers.

Also, as has happened with others, there just arent enough margins to give everyone more hardware to compensate.  Its not like these things have 100% margin so you cant just double up the supply.  Those days are long gone (avalon maybe even kncminer had great margins, the first time around... but the more recent asic companies have operated on much slimmer margins... and their costs are high because every part theyve ordered has to be on a 'rush' schedule which means everything costs a lot more than if you could give the suppliers the usual 12 weeks to source the parts (an eternity in bitcoinland)

SP is using twin Emerson power supplies in the SP30 box.  Each psu is specced at 1,000 watts for 100-200 volts input, and 1,200 watts at 200+ volts input (europe/israel are 220-240 volts and most data-centers in the world can do 208volts).  SP seem confident they will be able to run them at over their quoted spec (usa domestic power is 120 volts, asia is mostly 100volt etc).  the psus probably have more 'give' in them at higher input voltages so i dont expect the europeans or data centers will have an issue but there's less headroom when running on usa domestic power.

http://www.artesyn.com/power/power-supplies/websheet/401/DS1200

Our thoughts are with SP... hope they get their problems sorted quickly and that they pull magic rabbits out of the hat... All this amidst rocketfire and UN peer pressure.