Topic: PSU KNC NEPTUNE (Read 1425 times)

This is going to put a dent into my electric bills.    Hopefully I can mine more than my electric bill.

We have 16A in Germany.

Yeah that's right. But 10A or 16A doesn't matter. First of all, you are dead even if it's just 1A. Regular breakers are not made for protecting people. You usually have a RCD for that task, which trips at 30 mA (that's 0.03 A). Beside that, 230 V are usually not enough to get a high current through your body, because the resistance is to high (you may want to look up Ohm's law).

There's so much wrong and dangerous "knowledge" out there

What part of the EU are you in?
Sounds a bit dangerous. It's the Amps that kill you not the volts.  
Generally you reserve 16A circuit for an electric cooker, not for standard household sockets little kids stick their fingers in.

Here in the EU it's 230V X 16A = 3680 watt

They already said it would be beyond a standard US power socket 120V x 15A = 1800w
and EU power is 230V x 12A = 2760w

So it's somewhere between 1800w-2760w (2280w is the average)

everywhere the same questions over and over .... wait till knc releases some information on it, or do you really have to start building a nuclear plant in your garden tomorow ?

Hopefully they split it up in several boards/modules so we can power them individually with smaller power supplies. Also if we end up with a 2500W monster they will need a "slightly" bigger box than the current jupiter one to handle the cooling requirements ;p

KNC doesn't ship with power supplies do they?  I am figuring 2 X 1500 PSU's per Neptune.

Add that to my other ASIC preorders and it looks like I am going to need 32 X 1500 PSU's.

Anyone have a good source for qty PSU orders?

That information is not yet known. KnC will not give us details until they know for themselves, which is at least a couple months from now.

There is, however, speculation based on the "30% reduction in watts per GH" claim made on the Neptune product page. It's unclear if the 30% reduction is based solely on the chip's requirements or the entire device. I'd guess that the 30% number is somehow derived directly from TSMC's own info about their 20nm tech, which KnC is using.

Since My October Jupiter pulls ~1.2 watts per GH at the wall (measured with Kill A Watt), but only ~0.99 watts per GH measured at the VRM/chip level (using Bertmod), one could extrapolate that ~82.5% of the power is used by the chip itself and the rest is overhead in the PSU, fans, and other components. Given a 30% power reduction for the chip, one could assume ~0.69 watts per GH at the VRM/chip level for the Neptune. If the Neptune hashes at 3,000 GH/s, then it will require at least a 2070 watts for the VRMs/chip alone. If the Neptune is like the Jupiter in terms of overhead, then 2070 watts represents 82.5% of the total power needed at the wall. This leads us to a total requirement of ~2500 watts.

Now, DON'T GO BUY ANYTHING YET. KnC is known for delivering products that seriously outperform their original estimates. The Neptune could turn out to hash at 4TH for all we know (please don't expect this, it's unwise). If this is the case, then you can be sure the power requirements will be even higher. It's also possible that there's more than a 30% power reduction too, so keep that in mind.

So, this leads to the obvious question: "What power supply do I need!?". Nobody knows yet, but I'm betting (hoping) that KnC decides to use server-class power supplies instead of standard PC (ATX) power supplies. We won't know for quite a while though.

Hello,

can someone tell me how much Watts the NEPTUNE uses or is prefered?

Thanks.

cepoo