Try reading before responding.   I say there is no chance of a IxCoin ETF and you try to wow me with your brilliance on how Bitcoin will have an ETF.   At one time you also believed any and all alt-coins would explode in value when Bitcoin went up.  How did that work out.

There is a zero chance of that happening, about as much chance as a Bitcoin ETF in 2009.

Well that is possible although unless they are using some custom 1U reverse flow PSU, the PSU would still have the airflow in the wrong direction.   Just about any case can be installed in either direction but finding a PSU which intakes out the "back" is going to be tough.  Also the design really wouldn't make sense reversed.  You would have no intake fans and all 11 fans AFTER the obstruction of the boards.  Anything is possibly but occam's razoe an all that.

For those wondering what the hell we are talking about here is a mockup of the server.




Note I have no idea what the final unit will look like but looking at the photo "as is" the most plausible scenario is that the edge with the rack ears is the "front", airflow is front to back (in photo above it would be bottom to top) and goes:

font edge (cool aisle) -> 4 pusher fans -> radiator -> 4 puller fans -> 3 midplane fans ->  3 modules  on left + PSU on right -> back edge (hot aisle)



Maybe the description is right but the mockup doesn't match the description.  For the record I really doubt HF had either the case or power supply custom fabricated.  My guess is it is an OEM 2U "deep" (~30" comparing length to board) case and PSU.

I don't think it is two radiators

It is row of pusher 4 fans  ---> radiator ---> row of 4 puller fans.  Now at this point air pressure is going to be no existent so there are an additional 3 booster fans to increase air velocity over the boards.

Only 1 radiator and 3 rows of fans.   Then again we are looking at a crude schematic so who knows.  It would be good for HF to clarify the intended design.

Well a month later is a big deal.  Expect prices from all vendors to keep falling though. 

Not speaking for hashfast but for rackmount servers airflow always has to be front to back without exception.  A datacenter is going to use hot and cold aisles and they aren't going to reverse the flow on an entire row of racks (up to 400 servers) to accommodate a special request.

So either HF would need to put the modules up front or the airflow will be radiator first.  My guess is they have no choice but to have radiator up front because 2U is only 3.5" high that probably means the radiator is no more than ~3" tall.   A 19" case is ~17.5 wide but putting it in the back means losing 4" of width to the PSU.  Not sure a 13" by 3" radiator is up to the task of dumping 750W. 

Still your right the photo seems to directly contradict the description.

~0

There is no block explorer so I don't care enough to look backwards manually but the last 100 blocks combined had less than 1 IXC in fees.  So 1% of that would be 0.01 IXC.  Then again that is the point.  Nobody cares.  Nobody is building servies, nobody is building products, nobody is building tools. 

For example with Bitcoin anyone can lookup tx fees by just going to a url:
http://blockchain.info/charts/transaction-fees-usd?showDataPoints=false&timespan=&show_header=true&daysAverageString=7&scale=1&address=

Exactly zero.  Fees + block subsidy = miners reward.  If you have 1% of the hashpower, you will solve 1% of the blocks and 1% of the reward.

Thanks for the update and I am glad you confirmed this detail.  The entire package is 45mm by 45mm, is the lid smaller?   If so can you provide the lid dimensions?  
If lid occupies entire chip size that would be a surface area of 20.25 cm and a heat flux of 12.3 W/cm^2.

For those wondering what I mean.  Two example chip packages, pretend each is 45mm x 45mm.  The surface area of the lid for the  chip on the right is significantly larger.



Good to hear.  What is the operating temp the software targets? 60C?



Glad to hear that.  Care to share any details on radiator size?  Will all fittings be PC water cooling standard (G/14 threads, 3/8 or 1/2 ID barbs/compression fittings) to make upgrading radiator and other components possible with off the shelf components.


Thank you.  So I see it something like this.

Chip power: 250W  (~333A @ 0.75VDC)
Board power:  284W (~24A @ 12VDC)
System DC power: 315W (~@27@ 12VDC 284W board + 31W for controller, fans, pump, etc)
System AC power:  350W  (~3A @ 120VAC assumes 90% ATX PSU efficiency)



Thanks.  Eyeballing the diagram I assume the case is 2U high.  That would make the fans 80mm.  If diagram is to scale that puts the FET heat sinks @ ~60mm (+/-10%).  Are FET heatsinks removable (out of warranty of course).  The heat flux should be < 1 W/cm^2 which is trivial in immersion cooling.  The "shorter" the board height the closer they can be spaced and the less very expensive Fluorinert I need to buy.  Also some users may wish to replace them with water blocks.

 Of course and understood.


Excellent.  Thank you for all the info/details.  Keep it coming.  

Your node (QT client) will periodically rebroadcast tx it has sent which remain unconfirmed.  It will continue to rebroadcast forever until either the unconfirmed tx is removed from the wallet (using a third party tool like pywallet) or it is eventually included in a block.

Simple answer no.  Reversing engineering microprocessors can be done in theory.  It has been done in the past, multiple companies built unlicensed x86 processors until Intel killed them in court.  There is no reason to even try in this case; the knowledge of SHA-2 operations is public available you can design your own 28nm chip faster and cheaper than trying to reverse engineer someone else's design.

Remember to add AC wattage if it is applicable.  How much depends on efficiency of cooling system but generally 50% to 100% more (1.5 to 2.0 PUE) would be common.

As for straining the electrical system I would recommend installing dedicated outlets.  In the US you want NEMA L6-30R connected to a dedicated 30A breaker.  Thats a 30A 240V outlet which uses a locking connector.  You can then buy a cheap used PDU (power strip for server rack) with 12 outlets and have the ability to power up to 5760W (240 * 30 * 80%) worth of mining gear safely and securely.

I am pretty sure if was 2-3 weeks from the time Bitfury resellers received chips to the time the first orders went out.  Note Bitfury sold no boards to the public all miners sold to the public came from one of three partners/distributors who bought chips wholesale and did their own assembly, and delivery.  Essentially acting as OEMs much like how AMD doesn't sell any graphics cards to the public.

So yes 2 weeks is aggressive but reality is closer to 2 weeks then the 6+ months nonsense that BFL has used as an excuse.

https://bitcointalk.org/index.php?topic=283820.0

I would say 6 PH/s by end of 2013 to be VERY conservative at this point and we probably are looking at 10 to 15 PH/s by end of Q1 2014.  Beyond that it really is hard to say but honestly you should be considering this to be the bare minimum network speed and if it comes up short take any reduction in difficulty as a gift.

A bump for HF in case they missed it.

To be a little more clear bitcoins aren't in blocks directly;  blocks contain transactions.  One type of transaction is one that pays the block reward (subsidy + fees) to miners.  It is called the coinbase transaction.  There will always be a coinbase tx.  Today the coinbase for a random block might be 25.2 BTC consisting of 25 BTC subsidy + 0.2 BTC in fees.  In the future the subsidy portion will decline but every block will always have a coinbase tx.  A block must have one and only one coinbase tx but may thousands of other transactions as well.

As others have pointed out each tx hash is random however an atacker can generate as many as he wants and only broadcast the ones he wants to.

Compare that to a dice roll is random but allowing a gambler to roll as many times as he wants and then pick the dice roll would not be a good idea.

Can you take a photo?  How many PCIe connectors does it have?

Nobody be fooled.  The link is an affiliate link.  OP wins when you lose.  You lose because no glitch exists.

Something is either radically superior and replaces Bitcoin completely or it targets a niche where Bitcoin is less than optimal and coexists.  The silver to gold analogy is just wishful thinking.