ANTMINER S2 Discussion and Support Thread - page 116.

thomashrev89

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Quote from: Threader on April 30, 2014, 07:27:41 PM

Quote from: klondike_bar on April 30, 2014, 07:02:42 PM

keep in mind the cost of chips - there are 10x as many chips in an S2 as there is in an S1. If the chips still cost bitmain >$1.50 each (~$0.50/GH in an antminer S1) then they are a significant portion of the S2 price. add in a nice LCD, quality case (still tweaking the card support of course), and a PSU - a price drop to $2000 after coupon with delivery before the 14th of may would be fair, and a price I could afford a small premium over the S1 to buy. (fewer cords and better stacking for bigger mining farms)

I could do without the LCD and related display electronic circuits and instead have a 1050w or 1100w psu

Second that.

klondike_bar

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Quote from: mdopro1 on April 30, 2014, 08:31:40 PM

Quote from: mitak64 on April 30, 2014, 08:12:14 PM

1015 Watts, from the wall @120V

Ouch! That's more than 100% Sad

Maybe I'll install my Seasonic 1050W in this thing tomorrow.

the psu is ~88% efficienct near full load. that would be about a 900w draw from the miner

digitizing

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Quote from: mdopro1 on April 30, 2014, 08:31:40 PM

Quote from: mitak64 on April 30, 2014, 08:12:14 PM

1015 Watts, from the wall @120V

Ouch! That's more than 100% Sad

Maybe I'll install my Seasonic 1050W in this thing tomorrow.

just another case for example,
now I'm running mining rig 4x GPU R9 280x
with Seasonic X1050.
it draw 1200 watt from the wall @220 volt.
it's been running about 1 month.

mdopro1

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Quote from: mitak64 on April 30, 2014, 08:12:14 PM

1015 Watts, from the wall @120V

Ouch! That's more than 100% Sad

Maybe I'll install my Seasonic 1050W in this thing tomorrow.

mitak64

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1015 Watts, from the wall @120V

mdopro1

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Quote from: freebit13 on April 30, 2014, 03:28:44 PM

Quote from: PsychoticBoy on April 30, 2014, 03:24:04 PM

Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

PSU`s have safety margin of 10-20% so it is able to provide more than the rated 1000W but not for very long.
Lifetime of the PSU can be reduced by 500%

Cheers

As well as the fact that "at the wall" is quite different to "at the psu"... as long as the psu outlives the usefulness of the miner, I'm happy... only time will tell.

My B3S2 seems to be happy with the 1000W PSU. Time will tell but has anyone measured pull at the wall? Maybe it's 900W at the wall?

Threader

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Quote from: klondike_bar on April 30, 2014, 07:02:42 PM

keep in mind the cost of chips - there are 10x as many chips in an S2 as there is in an S1. If the chips still cost bitmain >$1.50 each (~$0.50/GH in an antminer S1) then they are a significant portion of the S2 price. add in a nice LCD, quality case (still tweaking the card support of course), and a PSU - a price drop to $2000 after coupon with delivery before the 14th of may would be fair, and a price I could afford a small premium over the S1 to buy. (fewer cords and better stacking for bigger mining farms)

I could do without the LCD and related display electronic circuits and instead have a 1050w or 1100w psu

klondike_bar

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Quote from: nottm28 on April 30, 2014, 04:09:54 PM

Quote from: philipma1957 on April 30, 2014, 03:37:24 PM

Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

If you buy an s-2 I advise you to pull 1 blade and list it on ebay for a high price. say 350 usd. Slowly drop the price if it does not sell.

As long as you get more then 250 the price is not bad. having 9 blades will allow the stock psu to not fry and die. getting 250 or more for the blade will make up for the lost hash.

do the math what does 100gh earn.
and the math shows the 100gh lost does not pay off 250 usd so selling it for 250 usd works out as the best move.

bottom line is the s-2 is not a great buy. it needs to be priced lower

Bitmain is a shrewd businessman - that is clear. He knows at this price the S2 will not ROI - watch for the price drop coming soon which will blow the S1 out of the water. This is typical businessmanship. I like this guy.

keep in mind the cost of chips - there are 10x as many chips in an S2 as there is in an S1. If the chips still cost bitmain >$1.50 each (~$0.50/GH in an antminer S1) then they are a significant portion of the S2 price. add in a nice LCD, quality case (still tweaking the card support of course), and a PSU - a price drop to $2000 after coupon with delivery before the 14th of may would be fair, and a price I could afford a small premium over the S1 to buy. (fewer cords and better stacking for bigger mining farms)

nottm28

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Quote from: philipma1957 on April 30, 2014, 03:37:24 PM

Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

If you buy an s-2 I advise you to pull 1 blade and list it on ebay for a high price. say 350 usd. Slowly drop the price if it does not sell.

As long as you get more then 250 the price is not bad. having 9 blades will allow the stock psu to not fry and die. getting 250 or more for the blade will make up for the lost hash.

do the math what does 100gh earn.
and the math shows the 100gh lost does not pay off 250 usd so selling it for 250 usd works out as the best move.

bottom line is the s-2 is not a great buy. it needs to be priced lower

Bitmain is a shrewd businessman - that is clear. He knows at this price the S2 will not ROI - watch for the price drop coming soon which will blow the S1 out of the water. This is typical businessmanship. I like this guy.

philipma1957

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Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

If you buy an s-2 I advise you to pull 1 blade and list it on ebay for a high price. say 350 usd. Slowly drop the price if it does not sell.

As long as you get more then 250 the price is not bad. having 9 blades will allow the stock psu to not fry and die. getting 250 or more for the blade will make up for the lost hash.

do the math what does 100gh earn.
and the math shows the 100gh lost does not pay off 250 usd so selling it for 250 usd works out as the best move.

bottom line is the s-2 is not a great buy. it needs to be priced lower

Syke

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Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

Because 1KW draw is not equal to 1KW output. Assuming 90% efficiency, a 1000W draw is only outputting 900W. PSUs are rated on their output, not the draw.

freebit13

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Quote from: PsychoticBoy on April 30, 2014, 03:24:04 PM

Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

PSU`s have safety margin of 10-20% so it is able to provide more than the rated 1000W but not for very long.
Lifetime of the PSU can be reduced by 500%

Cheers

As well as the fact that "at the wall" is quite different to "at the psu"... as long as the psu outlives the usefulness of the miner, I'm happy... only time will tell.

Unacceptable

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I love that homemade case!!

Look what I found!! Grin

http://www.electronicsandcables.com/Right-Angle-Patch-Cables/

ZiG

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Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

Magic...right... Wink

Ask BitMain, buddy...

PsychoticBoy

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Parental Advisory Explicit Content

Quote from: ?? on ??

How can the unit draw 1Kw and only have a 1Kw PSU ?

PSU`s have safety margin of 10-20% so it is able to provide more than the rated 1000W but not for very long.
Lifetime of the PSU can be reduced by 500%

Cheers

ZiG

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Activity: 406

Merit: 250

Quote from: whonesta on April 30, 2014, 02:32:54 PM

Quote from: TyrTheAlpha on April 30, 2014, 02:17:28 PM

Whonesta, could you post a picture of the 6 S1's in the 4U case?

Top fans have been reversed since this image and wiring is adjusted to mount in cabinet... Also once I got to DC I realized I could max out the horizontal spacing.

Nice...really good job, buddy...!

Thanks for sharing ...

whonesta

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I was planning to run a Neptune so I had built a custom DC bus to allow for 900A of 12V, as it became clear KnC would fail the S1's came in nicely to fill the load. Nothing against the ATX PSU's, I just prefer to have hot swappable, tunable power.

philipma1957

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Quote from: TyrTheAlpha on April 30, 2014, 02:17:28 PM

Quote from: whonesta on April 30, 2014, 01:35:18 PM

Hard to argue with the S1's being cheaper, I clocked one of my S1's down to 200 which brought speed down to 107 GH/s but also dropped power to equivalent with S2's W/GH. Knowing that it would seem S1's will be viable just as long as S2's. That is unless mod'ing can get us more then 1100 reliably. As far as rack space goes, I have been able to mount 6 antMiners within a 4U case, reversing the fans on "hotside" of cabinet, cut the BLUE wire to fans, and have seen NO meaningful heat differences between "coldside" and "hotside" of the cabinet. To be clear I am running 6 S1's within the same vertical foot print as 1 S2, so even when the time comes to under clock the S1's, the S1's will produce 1200 GH/s for the same 4U's..

Ordering another 208V/30A whip today!

Whonesta, could you post a picture of the 6 S1's in the 4U case?

that would be interesting to see.--------------quicker then me thanks for the photo

I have some shelving that allows 4 across I then use 2 psu's above that.

whonesta

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Quote from: TyrTheAlpha on April 30, 2014, 02:17:28 PM

Whonesta, could you post a picture of the 6 S1's in the 4U case?

Top fans have been reversed since this image and wiring is adjusted to mount in cabinet... Also once I got to DC I realized I could max out the horizontal spacing.

TyrTheAlpha

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Quote from: whonesta on April 30, 2014, 01:35:18 PM

Hard to argue with the S1's being cheaper, I clocked one of my S1's down to 200 which brought speed down to 107 GH/s but also dropped power to equivalent with S2's W/GH. Knowing that it would seem S1's will be viable just as long as S2's. That is unless mod'ing can get us more then 1100 reliably. As far as rack space goes, I have been able to mount 6 antMiners within a 4U case, reversing the fans on "hotside" of cabinet, cut the BLUE wire to fans, and have seen NO meaningful heat differences between "coldside" and "hotside" of the cabinet. To be clear I am running 6 S1's within the same vertical foot print as 1 S2, so even when the time comes to under clock the S1's, the S1's will produce 1200 GH/s for the same 4U's..

Ordering another 208V/30A whip today!

Whonesta, could you post a picture of the 6 S1's in the 4U case?

Topic: ANTMINER S2 Discussion and Support Thread - page 116. (Read 355820 times)