How much are you paying for the DC? I tried to rent a rack and all DC Companies I contacted more than $1500 per month for about 4.5TH, not even worth renting, have the machines in my basement but it's like 100F.

Listen very carefully.  Everytime someone writes about air conditioning with regard to mining datacenters, they are crazy and they don't understand heat and heat transfer.

Semiconductors don't mind 100F.  Not at all.  Humans can't work in 100F.  Air conditioning is for humans.  Not for semiconductors. 
Don't buy a fucking aircondtioner for mining equipment.  Ever.  Air conditioners make more heat than they make cold.  True fact.

To cool a data center, 100F is fine.  The trick is, to move the heat away from the semiconductor - fast.  If you put a shitload of 100F air movement on the semiconductor it will be fine.  Put some freaking heavy wind on it.  If the wind is 100F, the semiconductor will only be a bit higher.  What you need is tons of air movement.- not cold. 

Don't believe me?  Heat a piece of metal until it glows red.  Then blow on it. Goes back to black real fast.  Stop blowing - red again. 

If you put a shitload of air movement on your miners you'll remove heat really well - even if the air is 100F.  If you use water or air conditioning, or ice or dry ice, all you've done is introduced tons of complexity and little heat removal.  The most efficient way to remove heat is lots of wind.  It doesn't matter what temperature the wind is.  Even the Swedish winter isn't cold enough to cool mining equipment.  You need to get the fucking heat away from the semiconductor.  This doesn't take cold - it takes heat movement.  Making 'cold' is hard work.  Moving heat away from an ASIC is easy.  Use 'wind' - not 'cold' to efficiently cool your miners. 

regardless of packaging, Bitmain will still declare at full value as replied back to me .. my question is, how are they gonna declare it as the s3 are now sold in btc & not in usd value.

come on bitmain, i think you can do declare it at a lower value (cost/actual) & not full sales value !

can't recall thread but there were people who sent miners back to you for rma/repair and they were asked to declare it at usd10 !!!

why cant bitmain declare it at usd 50 to buyers then ?

customs clearance will be a real hassle by then for buyers. increased cost & lesser chance to ROI then how to sell more miners ?

i hope many will vote & request bitmain to look into customs declaration.

Thanks Bitmain for your reply,
So you are saying that each package will have its own invoice. If that's the case, then orders of 2 x S3s should still be each S3 packaged with its own single value on its customs note.

Edit, sorry, I would have thought that package type, or single packages need individual invoices, therefore separate values from any of the other 100 or so packages coming into customs.  

Or are you stating that even if we order 100 separate packages to the single shipping address, all the values of the combined packages add up for import tax purposes?

Sorry, I thought a preorder meant something that couldn't be delivered straight away because it was not yet available. And in this case, why would delivery be delayed for 2 weeks when Bitmains excellent record of postage within 2 days of order is not the case?
Happy for all your arguments against.
Please also read my original post which has plenty of well deserved praise for Bitmain.

All im really after is clarification from Bitmain is to how they are going to accept orders, 1 or min 2 for Batch 2 and also if 2 are ordered, then are they posted in one package or 2.
Thanks.

Can someone explain why we were able to overclock the S1, which pulls 420w off of 2 PCIe cables, but to overclock the S3 to 390w will require 4 PCIe cables? I'm just not understanding this.
I have some Corsair HX850, which I was planning to use to power two S3's overclocked at 390w each. The HX850 has max 6 PCIe cables.6I also have a Rosewell 1300w PSU that I planned of using to power 3 overclocked S3's, which I believe also has 6 PCIe cables.

@Bitmain

How about dropping the price on the S2 so that it is comparable to S3 pricing with respect to BTC per GH/s??

S3 should make roughly .019 btc a day if that helps....

It's much less than 25 cents per KWH, but I live in Ohio, which is cheaper than Jersey. I got quotes and negotiated with multiple data centers until I got one that I liked, but can tell you for sure that the first quote you get from them is likely to be very inflated.

I was not in a hurry and took my time, and the co-loc facilty I liked the best had a price match policy. I was able to get them to beat a quote from another co-loc facility that offered a good price, but I didn't like as much.

Also, keep in mind that you don't need a gold plated co-loc facility for BTC mining. I haven't had any downtime yet but a little downtime does not bother me too much for the price I am paying, and BTC also uses very little network bandwidth. You don't need a state of the art data center for BTC mining, and I certainly didn't want to pay state of the art data center prices.

I was actually very frustrated with my data center search until I filled out a request at http://www.datacentermap.com. Within 24 hours, I was contacted by three different data centers in the area that I hadn't previously considered, and ended up choosing one of them. I highly recommend that site to start your search.

The main risk with renting co-loc space is the contract length. I had to commit to 12 months, so the first few months of your contract are the most risky. It would be very painful for the price of BTC to crash right after signing a 12 month co-loc contract.

Also, a lot of co-loc facilities require insurance, which is a royal pain in the ass to get for any BTC related business. The big, conservative insurance companies like State Farm and Nationwide will not touch a BTC mining business with a ten foot pole. I had to work with multiple insurance agents, and it took me a couple of weeks, but I was finally able to get insurance through Travelers.

It takes a while, but persistence pays off. If it was easy to make a profit mining BTC, everyone would do it.

That is proprietary information, so I'll never tell. I am very happy with the cost and quality of this co-location facility, and it's close to where I live.

clearly says 28.8

thx!

1 fan blows air in, and the other at the rear part throws air out, right?

and link for those orange / black fans also please? thx!

Why you guys keep calling Elene Len a GUY. If not stated otherwise, she is a female, and a lucky first Neptune owner   .
I wonder where additional 500-600W go if ASICS are only 1440? Seems like an awful lot of power to drive fans and/or controller.

I spoke with one of their engineers on IRC about this.

The information he provided was that the 150w listed in the specs for PCI-E isn't a limit it's the minimum requirement for it to be PCI-E compatible, and that that good quality PSU's can handle it fine.

I'm going the Dual EVGA 1300W route as I have them handy, early order so will report back how it goes.

No they're the five ASIC boxes.  Those things plus a controller and a pile of PSUs are the "neptune".

hmm, yeah...  looks like you get double the wattage using the extra two black pins going from six to eight pin. Maybe there's a way we can jumper the extra ground to the psu to compensate for it being six pin. (Just a thought)

Those housings will not survive at those ratings and become brittle and then melt/burn out. I really hope that KnC can get the power down for these or it will be real interesting.

Those are enclosures with fans only. No electronics it seems. Okay, might be in assembly but if they're shipping by the end of this week, why no specs so people can get power supplies? Something still isn't right with all this.