That would (continue to) be outstanding! Yes, please. 

So we are within the 72 hour window to go gangbusters?

I think Sophokles answered your question.

Links: http://tinyurl.com/m4zy7p3  <-- this was posted elsewhere, maybe in this thread IIRC.

Am working on a case/cooling solution, are dimensions of the production heatsink known?

Edit: I'll see your tad of unqualified FUD and raise you an iota of qualified optimism:

Read the links that discuss this. Cooling electric/electronic systems by direct oil contact has been in use for decades. Computer users have historically not done so, likely because there hasn't been a need. The likes of Intel have done studies spanning a year of nonstop server operation. Follow up failure analysis indicated hardware was in fine shape. The benefit was significant operational cost reductions, primarily in the form of reduced air conditioning costs. There are others who have had similar results, these studies are interesting reads.


Yes, the heat capacity of water is the best. Cheap, widely available. It is one alternative. Indeed, thermodynamics tells us that the heat must go somewhere. In this particular case, away from the ASIC chip is all that matters. There are many ways to do this. Water is one, oil another. The combination of the two... or just air. Creativity is the only limiting factor here.


From what I have seen on the forum, the OC attempts were performed under air cooled conditions. I may have missed a thread, if I am mistaken I would be interested in reading it. If all these OC studies were under air cooling, these are not the conditions that Yifu (BitsynCom) identified that 450MHz was achieved at Avalon. Your point is taken, I would like to see more info from Avalon regarding that study (duration, conditions, errors thrown, etc.). The only info offered was that "450" was not achieved under air cooled conditions.


I think you answered your own question there.

I also agree with you: we need to get these boards in hand as soon as the PCB designers have achieved their design aim.

Thanks Silv0r.

Are there any reliable estimates for amp/power requirements at that speed (within a tolerable range)?

Because I have a small brain, I am not clear what this means:


Is the 450 value clock speed, MH/s, GH/s??? Is that value for a 3, 4 card Avalon unit, a per chip over clocking value or a per chip hash value?

The discussion in this thread seems unclear.

Hopefully the power requirements for 450MHz clocking is being considered for both forms of the board? 

Air conditioning most likely... maintaining adequate temp gradient between environment and hardware.

http://phys.org/news/2012-09-intel-math-oil-dunk-cooler-servers.html
http://www.datacenterdynamics.com/focus/archive/2012/03/cgg-veritas-uses-liquid-cooled-servers-hpc-environment

Range... would be worth looking at heat production of existing Avalon systems. Need to poke around on forum for that... and electricity cost is another variable. Commercial/industrial rates are typically cheaper than residential.

Interesting info on oil choices:
IEC 60422, IEC 60296 (Google search should turn up some useful links) and

http://www.power-eng.com/whitepapers/2012/shell.whitepaperpdf.render.pdf

I think oil and cubes design could be integrated. If you couple the heated oil to water, you can generate hot water and save on that as well. Some ideas to ponder from the world of power transformers http://www.electrical4u.com/transformer-cooling-system-and-methods/

Not to be contentious, but Sebastian I think you are mistaken regarding the operation of equipment 24/7. Intel and many other data centers have done exactly that. Intel did a one year pilot study and follow up failure analysis indicated nothing of mention. There are certainly other issues in terms of maintenance, which is where good design can make a significant difference. Modular mining units (the blade designs appeal too for this reason) that have snap on feature seem like a good idea IMHO. If you search for the Intel pilot study, it is also interesting to note the significant decrease in power consumption. Considering that these miners will have a carbon footprint the likes of Godzilla rampaging through downtown Tokyo, this is a good thing *financially* for miners as well. Less cost up front.

That being said, there is the oil and despite the videos demonstrating ease of service http://www.youtube.com/watch?v=U5zoIEjo1Zk there's still the oil. The fewer small parts to drop, misplace, recover from the bottom of the oil reservoir, the better.

Lots of design opportunities here... I don't think ordering a GRCooling Carnojet system is necessarily the most prudent solution for everyone... as pointed out previously the shipping costs are likely crippling.

See page one of this thread. Two bullets of interest. First is about halfway down describing how/when website will go up. The second is a link at the bottom so you can register for newsletter.

ah. 

I was mistaken and thought there were more pages to the pdf, not that you were referring to the thread page.


Am looking at oil cooling, some interesting options to consider. This size info will help for the enclosure. I am wondering whether the 2 year warranty burnin is offering will be voided by this...

Regardless, thanks!

bitcoiner49er: If that link is for p. 29, where might one obtain the entire doc? 

Terrahash:

The rationale to not escrow through John K. remains unaddressed. Simply declining to escrow without offering a rationale seems amiss, especially since it would actually benefit you in terms of credibility.

It could still remain in BTC, it would offer buyers a degree of confidence in an unproven product/service and I am sure the small fee that John K. charges is not a barrier to purchasing for those preferring fair terms of trade.

SUP; FullFathom5; flyonwall

If you think the content of that exchange would make a meaningful contribution to their credibility, please share it. Otherwise your statement is, like many in this thread, purely sentimental.

Not to their defense: they cannot respond to legitimate questions about their business.

Hah! Worked for me twice apparently, but each time the web page gave error that the list had "disappeared".

All good. Thanks for feedback.

While I am not keen on FUD (however well intended) I do have a couple questions that Terrahash should address.

You are offering assembly, which means you will need a certain amount of resources (space, equipment, personnel).

How are you going to accomplish this when the last two business addresses you have claimed for Terrahash are vacant?

The first address you listed, 1261 Birchwood Drive, Sunnyvale, CA 94089 has been vacant to over 6 months, confirmed by realtor.

The second address, 1800 Wyatt Drive, Suite 15, Santa Clara, CA 95054 is also vacant, confirmed by realtor.

Edit: When I took these photos, I also called the numbers listed below to confirm the history/vacancy of these properties.

Links to realtor contact info for both properties:
http://imgur.com/iBIzscY
http://imgur.com/nPc93SY

Terrahash please explain. You offer no escrow which John K. on this forum offers for reasonable fee. This starts to look like a questionable enterprise.

Attempted to sign up for this list but did not work for me. Is this list still up & active?

FUD.

Take a look at his thread: https://bitcointalk.org/index.php?topic=189976.0

Fair questions. From what I read on the announcement thread:


Bullet #1 starts uncertain, ends strongly with them signing up with ASIC Hosting Service. Looks like they are detailing the service contract.

Don't want to clutter the thread, just to keep it current.