ANN: BITMAIN has Tested Its 28nm Bitcoin Mining Chip BM1382

[jpchrist]

Anyone else still waiting for customs?  All of my S3s have been stuck there for almost 7 days now.    :-/   I'm losing all kinds of BTC while waiting.

Nope, mine has been going for over a week now, so many coins!

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[klondike_bar]

@Bitmain

Will Bitmain release a Antminer U3?

greets and thanks

they will not

the chip wouldn't be well-suited; even a 2A USB 3.0 port would only provide 24w, or maybe 30GH using two chips.  It would probably cost over $60 in bulk and require forced air cooling. a typical USB 2.0 (500mA) such as with the U2 would only provide 1/10th that power though and would require costs of ~$12/GH to produce

[taipo]

Have you called UPS to see what info is missing, I would start there.

There appear to be a number of miners caught up at UPS in Shenzhen. Even many batch 1 miners are still there.

[Atomar]

This thermal paste has "only" Thermal conductivity (W/mK): 8.5

I have seen some thermal plates in our Office with 220w/mk
I think, as soon as I have my S3 I will replace the original paste with those ...

What is it...220W/mk...
Could you post the brand of it, specs...where to buy...more details, please...
Thanks,
ZiG

I have to ask our EE in the Office for more info on Monday.

@ aztecminer: It IS electricity conductive .. BUT since it is NOT a paste, there should be no Problem with that
as long it is cut the right size

[J4bberwock]

Have you called UPS to see what info is missing, I would start there.

There appear to be a number of miners caught up at UPS in Shenzhen. Even many batch 1 miners are still there.

Customs or UPS are building a farm, they don't pay for electricity in their office.

[ZiG]

This thermal paste has "only" Thermal conductivity (W/mK): 8.5

I have seen some thermal plates in our Office with 220w/mk
I think, as soon as I have my S3 I will replace the original paste with those ...

What is it...220W/mk...
Could you post the brand of it, specs...where to buy...more details, please...
Thanks,
ZiG

I have to ask our EE in the Office for more info on Monday.

@ aztecminer: It IS electricity conductive .. BUT since it is NOT a paste, there should be no Problem with that
as long it is cut the right size

Please ask...Picture(s) will help too...

Thanks

[Atomar]

I have to ask our EE in the Office for more info on Monday.

@ aztecminer: It IS electricity conductive .. BUT since it is NOT a paste, there should be no Problem with that
as long it is cut the right size

Please ask...Picture(s) will help too...

Thanks

Here we go
Check this PDF catalog: http://www.heatmanagement.com/local/media/pdfs/Kunze_ProductCatalogue-2014.pdf
I (our EE) was talking about the pad on page 80 !!

There are even bether ones on page 94 mage with carbon !

Hope this helps

[buy4crypto]

Can anyone suggest if this is a good PSU for 1 S3?

Corsair CX750 Builder Series ATX 80 PLUS Bronze Certified Power Supply.

[aztecminer]

This thermal paste has "only" Thermal conductivity (W/mK): 8.5

I have seen some thermal plates in our Office with 220w/mk
I think, as soon as I have my S3 I will replace the original paste with those ...

What is it...220W/mk...
Could you post the brand of it, specs...where to buy...more details, please...
Thanks,
ZiG

I have to ask our EE in the Office for more info on Monday.

@ aztecminer: It IS electricity conductive .. BUT since it is NOT a paste, there should be no Problem with that
as long it is cut the right size

i see you said thermal plates, i read it as thermal paste .. well you can buy copper thermal shims too which are basically copper plates:

http://www.amazon.com/Vktech-Heatsink-Copper-Thermal-15mmx15mm/dp/B00E5SMY0W/ref=sr_1_4?ie=UTF8&qid=1406561893&sr=8-4&keywords=copper+thermal+shims
"The copper has high purity coefficient of thermal conductivity as high as 407 w/ (m•K)"

our problem though is the S3 case does now allow as much air flow on the outside where we want to cool ..
copper needs to be air cooled because it does not dissipate the heat as fast as aluminum..
therefore in our application aluminum heat sinks will be best on the other chips we need to cool..
for the asic chips under the aluminum heat sink i think a good thermal paste is best.
even if you use your thermal plates you still will need a thermal paste between the chip and the plate .

[allcoinminer]

Can anyone suggest if this is a good PSU for 1 S3?

Corsair CX750 Builder Series ATX 80 PLUS Bronze Certified Power Supply.

For one Antminer S3 Corsair CX750 is more than enough. This is an entry level which has higher Ampere rating at +12V rail.
CX750 non-modular version is devised with a single +12V 46A rail which gives 552W.
It has four PCI-E Sleeved cable connectors which is enough for a single Antminer S3 even if you are overclocking.
It gives above 88% efficiency at 230VAC and above 85% efficiency at 115VAC when loaded at 50% to 60% load.
So, the Antminer S3 at 330Watts clock speed will give the most efficient performance level.

[nightyj]

I received my refund  , there was a delay in UPS shipment do to their mistake , in the ups tracking link it is written:
A UPS error has delayed delivery. We're adjusting plans and working to deliver your package as quickly as possible.

[MrTeal]

This thermal paste has "only" Thermal conductivity (W/mK): 8.5

I have seen some thermal plates in our Office with 220w/mk
I think, as soon as I have my S3 I will replace the original paste with those ...

What is it...220W/mk...
Could you post the brand of it, specs...where to buy...more details, please...
Thanks,
ZiG

I have to ask our EE in the Office for more info on Monday.

@ aztecminer: It IS electricity conductive .. BUT since it is NOT a paste, there should be no Problem with that
as long it is cut the right size

If it's a pad (as opposed to a copper shim which is kind of useless as a TIM) it's almost certainly a graphite sheet like this one.
http://www.digikey.com/product-detail/en/A10462-03/926-1008-ND/2268505
240W/mK, but only in the x-y direction. If you look at the datasheet, it has 5W/mK, which will be much worse than a standard paste as a thermal interface between chip and heatsink. They're used as heat spreaders.

8.5W/mK is fine for a thermal paste, the bulk conductivity is almost a meaningless measurement. Keep in mind that the bulk thermal impedance (in degrees C (or K) per watt) is distance / (area * conductivity). If your surfaces are pretty small and you have a bit of pressure, the bond line (distance between the heatsink and chip) can be on the order of 1 mil (0.0254mm). Even at 0.1mm and for something like a VRM chip with a 1~cm square chip, 8.4W/mK is a temperature rise of 0.12C per watt. Even if you had a paste that was rated at 1W/mK it'd only be a 1K/W temperature rise, which when you're only looking to dissipate a few watts is essentially meaningless.

Even for the main board (assuming it's around 120mm x 250mm or so like the S1 board) it doesn't make a difference there. Even if your gap is 1mm (which is huge), that's still 0.001m/(.12m*.25m*8.4W/mK) = 0.004K/W. Sure there's some simplifications assuming a fairly even distribution of heat in the board, but for 200W per board you'd still only be looking at a 0.8C rise over the thermal compound.

tl;dr, the bulk conductivity of a paste is almost meaningless. What really matters is how well it wets the surface and how small a bond line it can give you. How well it resists pumping out is important too, but not so much in mining equipment that should run at temperature 24/7. For something like the interface from the board to the heatsink for an S3, you'll want something that has a fairly low viscosity and spreads really well, since you'll have pressure points at the screw heads instead of nice even pressure, and getting a consistent amount of TIM across the whole board would be a challenge.

[elduderino]

Has anyone come up with a cheap water cooling solution for the S3?  I already have a nice waterloop built that i'd like to use with a 34" radiator outside.  Hopefully I don't have to spend an arm+leg on water blocks...

what do you want water cooling for?  you can't over clock most of them.  the stock fans keep the gear pretty cool.

if you set freq to 212.5 it is cooler and pretty quiet .  not whisper quiet but decent.

Not sure what your need for a water block cooler is based on.   for all I know  you may have a really good reason.

I have an existing waterloop in my server closet and I'm trying to minimize heat inside.  I'd also like to see how much OC I could get with water cooling.

okay a good reason.  so far it appears the cooling problem is not the chips but the dc to dc regulator.

Maybe of them don't preform well.  If you can get it to cool well I would think you will get an oc to freq 250 and 504gh

i will be replacing thermal paste:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835426020

adding heat sinks to regulators:

http://www.amazon.com/Cosmos-Aluminum-Cooling-Heatsinks-cooler/dp/B007XACV8O/ref=lh_ni_t?ie=UTF8&psc=1&smid=ARQJFRRH30M2B

and more psu's:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139057

Cool list, Aztecminer.

It seems like that would power 2 S3s & still have some room for O/Cing? I looked but couldn't find how many PCI-E connectors it had... It looks like 6 in the photo.

[Mudbankkeith]

Batch 4 is now shipping 

[TracerX]

Batch 4 is now shipping 

I can confirm that, got my notification and the package is moving.

[pawlo74]

Any news about upgrade S2 ?

[allcoinminer]

Any news about upgrade S3 ?

If you meant an upgrade from S1, then its waiting announcement from bitmaintech.

[allcoinminer]

Batch 4 is now shipping 

I can confirm that, got my notification and the package is moving.

How you guys tracked it?

[pawlo74]

Any news about upgrade S3 ?

If you meant an upgrade from S1, then its waiting announcement from bitmaintech.

Sorry I meant S2
Yeah, still waiting ? what for ?
until there gonna be no point to upgrade, unprofitable 
if here is someone thinking to buy forget about it
You will never get ROI
maybe first batches of S1 but now NEVER ROI
or you might like flash money down the toilet as me 6xS2 and 2xSP10
Bitmaintech, Spondoolies clever guys
Cheers happy mining

[BITMAIN]

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