ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 313.

RichBC

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Quote from: d57heinz on October 12, 2015, 01:13:53 PM

Quote from: RichBC on October 12, 2015, 12:44:02 PM

Like it or not they have been very clear on the PSU spec from the start, although I immediately thought that it indicated they were having trouble meeting the spec with less than 12V... If you have a server PSU I would connect the sense wires to the PCIE socket and that will then compensate for any loss in the wiring.

Single PSU not necessarily more efficient, what is more important is operating a PSU at it's most efficient current.

Rich

well i think it would be more efficient in that you are running one fan instead of three to cool psu and less components to travel thru with one psu vs three.. That was my thinking there. I havent tested it but id think there has to be some savings with one psu vs 3

Best Regards
d57heinz

Yes... Except that the efficiency of the PSU is quoted including the fan. So... if you had 2 Identical PSU's both 90% efficient at 1200W & 95% efficient at 600W and you needed 1200W then you would be better to use 2 PSU.

Rich

hawkfish007

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Quote from: lezuric on October 12, 2015, 01:10:52 PM

How about those orders who get their PSU first and still no confirmation of shipping of their S7 yet. Im one of those people. 09/07/2015 order date.

I think Bitmain is working on Sep 3-4 orders now, I am Sep 5 with no confirmation just order status changed to shipped (Sep 28) w/o carrier or tracking information.

d57heinz

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Quote from: RichBC on October 12, 2015, 12:44:02 PM

Like it or not they have been very clear on the PSU spec from the start, although I immediately thought that it indicated they were having trouble meeting the spec with less than 12V... If you have a server PSU I would connect the sense wires to the PCIE socket and that will then compensate for any loss in the wiring.

Single PSU not necessarily more efficient, what is more important is operating a PSU at it's most efficient current.

Rich

well i think it would be more efficient in that you are running one fan instead of three to cool psu and less components to travel thru with one psu vs three.. That was my thinking there. I havent tested it but id think there has to be some savings with one psu vs 3

Best Regards
d57heinz

Cassey

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Quote from: lezuric on October 12, 2015, 01:10:52 PM

How about those orders who get their PSU first and still no confirmation of shipping of their S7 yet. Im one of those people. 09/07/2015 order date.

Me too, 09/02/2015 date, but was contacted by DHL and am expecting mine yet today.

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Quote from: Biodom on October 12, 2015, 01:02:04 PM

Quote from: Cassey on October 12, 2015, 12:51:51 PM

Quote from: Biodom on October 12, 2015, 12:47:30 PM

Brilliant! However, there were only a few people that ordered or had EVGA 1600 Gold or Plat, hence problems. In addition, unless you install a 220v circuit, you are limited to oven/dryer outlet with Bitmains's PSU (in US at least).

Hardly. I'm USA based and simply dropped (2) 30amp 220V circuits onto a wall and run PDUs from them. Bought some power cords to match online and have been riding golden on my mining equipment every since.

well, you did install 30amp 220v circuits-exactly like I said above. I talked to electrician and he said that the wire gauge in my house is less than needed for 20-30amp circuits. I forgot the exact number-14 needed, I think. I hope that you have the right wire, but I don't-I could price it with electrician, of course, but did not get to it yet.

I ran mine straight from the panel, with the 10 gauge wire required for a 30 amp circuit, into a new 30 amp 220V breaker.

FYI: Within a US household and associated typical run lengths:

14 gauge wire (often with a white covering) is rated for 15 amps
12 gauge wire (often with a yellow covering) is rated for 20 amps
10 gauge wire (typically with a black covering) is rated for 30 amps

voltage doesn't matter with regards to wire thickness - at least at the voltages we are talking about.

All of this, including how to install such a circuit, is available in a ~$10 book on wiring available in most Home Depots or Lowes type stores. Of course, only do what you are comfortable doing.

lezuric

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How about those orders who get their PSU first and still no confirmation of shipping of their S7 yet. Im one of those people. 09/07/2015 order date.

Biodom

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Quote from: Cassey on October 12, 2015, 12:51:51 PM

Quote from: Biodom on October 12, 2015, 12:47:30 PM

Brilliant! However, there were only a few people that ordered or had EVGA 1600 Gold or Plat, hence problems. In addition, unless you install a 220v circuit, you are limited to oven/dryer outlet with Bitmains's PSU (in US at least).

Hardly. I'm USA based and simply dropped (2) 30amp 220V circuits onto a wall and run PDUs from them. Bought some power cords to match online and have been riding golden on my mining equipment every since.

well, you did install 30amp 220v circuits-exactly like I said above. I talked to electrician and he said that the wire gauge in my house is less than needed for 20-30amp circuits. I forgot the exact number-14 needed, I think. I hope that you have the right wire, but I don't-I could price it with electrician, of course, but did not get to it yet.

Cassey

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Quote from: Biodom on October 12, 2015, 12:47:30 PM

Brilliant! However, there were only a few people that ordered or had EVGA 1600 Gold or Plat, hence problems. In addition, unless you install a 220v circuit, you are limited to oven/dryer outlet with Bitmains's PSU (in US at least).

Hardly. I'm USA based and simply dropped (2) 30amp 220V circuits onto a wall and run PDUs from them. Bought some power cords to match online and have been riding golden on my mining equipment every since.

Biodom

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Quote from: philipma1957 on October 11, 2015, 12:04:40 AM

I ordered 2 on day one they arrived fast and with the soft reboot i can do 4800 on each one at freq 600.
I believe the batch one can do close to spec if your psu really gives 11.9 volts to each pcie jack with full draw on it.

my guess is this s-7 needs very close to prefect voltage so if your psu sags below 11.8 at the socket you are fucked.
my second guess is most people don't know how to measure the draw at the socket to see just how bad the psu sags.

my psu is putting out 12.07 volts before it hits the s-7 socket the 1200 watts pulled across nine sockets drops the power down to 11.94 volts this is above 11.8 which is good. but all nine sockets read 11.93 or 11.94 volts.

I suspect that most losing s-7 low hash like 4600 would do better if the psu supplied really tight numbers.

like all nine jack at 11.93 or 11.94 i think if you have two psu's and five jacks are getting 11.9 and the other four jacks get 11.96

you get a fail due to 11.9 mixed with 11.94.

Brilliant! However, there were only a few people that ordered or had EVGA 1600 Gold or Plat, hence problems. In addition, unless you install a 220v circuit, you are limited to oven/dryer outlet with Bitmains's PSU (in US at least).

In my experience of ~2 weeks, running on EVGA 1300 (with two additional connectors provided by two Startech PCIe splitters connected to two red "single" cables) is sufficiently stable so far at 600 (~4836 GH). The same PSU was also stable at both 606 (~4886) and 612 (~4915).
You are absolutely right re mixing two PSUs, though.

RichBC

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Like it or not they have been very clear on the PSU spec from the start, although I immediately thought that it indicated they were having trouble meeting the spec with less than 12V... If you have a server PSU I would connect the sense wires to the PCIE socket and that will then compensate for any loss in the wiring.

Single PSU not necessarily more efficient, what is more important is operating a PSU at it's most efficient current.

Rich

d57heinz

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Quote from: AriesIV10 on October 12, 2015, 11:54:24 AM

Quote from: philipma1957 on October 11, 2015, 12:04:40 AM

I ordered 2 on day one they arrived fast and with the soft reboot i can do 4800 on each one at freq 600.
I believe the batch one can do close to spec if your psu really gives 11.9 volts to each pcie jack with full draw on it.

my guess is this s-7 needs very close to prefect voltage so if your psu sags below 11.8 at the socket you are fucked.
my second guess is most people don't know how to measure the draw at the socket to see just how bad the psu sags.

my psu is putting out 12.07 volts before it hits the s-7 socket the 1200 watts pulled across nine sockets drops the power down to 11.94 volts this is above 11.8 which is good. but all nine sockets read 11.93 or 11.94 volts.

I suspect that most losing s-7 low hash like 4600 would do better if the psu supplied really tight numbers.

like all nine jack at 11.93 or 11.94 i think if you have two psu's and five jacks are getting 11.9 and the other four jacks get 11.96

you get a fail due to 11.9 mixed with 11.94.

Just did some voltage tests this weekend:

# Ave gh/s Freq Temp HW Voltage PSU
2 4744 600 54,54,56 0.0011% 11.68-11.74 3 x Antec 750w Platinum PSU
5 4738 600 52,52,55 0.0235% 11.92 1 x Bitmain APW3-12-1600-B2
1 4582 575 50,47,46 0.0338% 11.68-11.74 1 x Coolmax 1600-Watts Silver PSU
3 4513 600 53,54,55 0.0384% 11.68-11.74 3 x Antec 750w Platinum PSU
4 4480 600 54,53,55 0.0985% 11.68-11.74 3 x Antec 750w Platinum PSU

All of these had the Antec 750w Platinum PSUs with the same voltage. I have also tried the EVGA 1300W Gold PSU that tested at the same voltage. I have just changed #1 from 3 x Antec 750w Platinum PSU to the Coolmax 1600-Watts Silver PSU with no change in voltage. #1 was running at 4276gh/s 600MHZ 49,46,44 0.1174%. I may have to change #4 and #3 to 575MHZ as well.

RESULTS: I never seen 1 lead testing at 11.9 or above for anything other than the Bitmain APW3-12-1600-B2. I am in the US and had to change my circuit breaker to 220 to be able to run this and get these results, but I may have to do this for more of them.

Problem is they are designing these using 220v as thats standard for china.. The same reason we had so many problems with the s4 psu is they thought it would get the same efficiency on 110 v as 220.. Thus the reason so many s4 psu burnt up.. Psu rated at 1200 on 110 and 1400 w at 220.. Makes all the difference.. Bitmain should have stated that this miner will under-perform if not using their psu. how convenient i might add. If you look at the product page it states 4. Rated Voltage: 12.0V+5%, should not be less than 12.0V not only should it not be less but they actually recommend more.. Up to 12.6 v. Basically forcing you to buy their psu. Im going to test some server psu under load and see what voltage drop looks like there aswell. Be nice if we can come up with a list of psu that will run these miners at the proper voltage. I also wonder if not supplying proper input voltage will cause problems with the expected efficiency.. Aries i realize its a lot of work but would be cool if you took a killawatt or an ammeter and check out the wattage draw using three psu at undervoltage vs the one bitmain provides at 220 volts.. Ill be willing to bet the single psu design is quite a bit more efficient.. 1 for being a single psu but also due to being on 220.. Thanks for your info

Best Regards
d57heinz

aurel57

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Quote from: clgrissom3 on October 12, 2015, 12:10:55 PM

I ordered 4 on 9/6/2015 so it may take a couple more days to get the actual shipping information. Right now it just has Date 2015-09-28 00:00:00 under Ship Detals. Carrier and Tracking No. are both blank.

Quote from: clgrissom3 on October 12, 2015, 12:13:25 PM

I just don't get Ship Date Date 2015-09-28 00:00:00 at all. It's not logical.

My order/pay date was 9/08 and it shows same as yours. Mine is not showing up in the UPS system so it has not been sent yet.

Send Details
Carrier
Tracking No.
Date   2015-09-28 00:00:00

clgrissom3

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Carl, aka Sonny :)

I just don't get Ship Date Date 2015-09-28 00:00:00 at all. It's not logical.

clgrissom3

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Carl, aka Sonny :)

I ordered 4 on 9/6/2015 so it may take a couple more days to get the actual shipping information. Right now it just has Date 2015-09-28 00:00:00 under Ship Detals. Carrier and Tracking No. are both blank.

Dr Charles

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Quote from: Prelude on October 12, 2015, 11:38:14 AM

So I got my shipping notification from bitmain via email this morning.

Interesting that bitmain claims that it was supposed to be shipped on the 28th of September but it only went out on the 8th of October. Guess they decided to stress test it for another 12 days to make sure I got a good unit! Roll Eyes

Well at least you have a real tracking number...

AriesIV10

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Quote from: philipma1957 on October 11, 2015, 12:04:40 AM

I ordered 2 on day one they arrived fast and with the soft reboot i can do 4800 on each one at freq 600.
I believe the batch one can do close to spec if your psu really gives 11.9 volts to each pcie jack with full draw on it.

my guess is this s-7 needs very close to prefect voltage so if your psu sags below 11.8 at the socket you are fucked.
my second guess is most people don't know how to measure the draw at the socket to see just how bad the psu sags.

my psu is putting out 12.07 volts before it hits the s-7 socket the 1200 watts pulled across nine sockets drops the power down to 11.94 volts this is above 11.8 which is good. but all nine sockets read 11.93 or 11.94 volts.

I suspect that most losing s-7 low hash like 4600 would do better if the psu supplied really tight numbers.

like all nine jack at 11.93 or 11.94 i think if you have two psu's and five jacks are getting 11.9 and the other four jacks get 11.96

you get a fail due to 11.9 mixed with 11.94.

Just did some voltage tests this weekend:

# Ave gh/s Freq Temp HW Voltage PSU
2 4744 600 54,54,56 0.0011% 11.68-11.74 3 x Antec 750w Platinum PSU
5 4738 600 52,52,55 0.0235% 11.92 1 x Bitmain APW3-12-1600-B2
1 4582 575 50,47,46 0.0338% 11.68-11.74 1 x Coolmax 1600-Watts Silver PSU
3 4513 600 53,54,55 0.0384% 11.68-11.74 3 x Antec 750w Platinum PSU
4 4480 600 54,53,55 0.0985% 11.68-11.74 3 x Antec 750w Platinum PSU

All of these had the Antec 750w Platinum PSUs with the same voltage. I have also tried the EVGA 1300W Gold PSU that tested at the same voltage. I have just changed #1 from 3 x Antec 750w Platinum PSU to the Coolmax 1600-Watts Silver PSU with no change in voltage. #1 was running at 4276gh/s 600MHZ 49,46,44 0.1174%. I may have to change #4 and #3 to 575MHZ as well.

RESULTS: I never seen 1 lead testing at 11.9 or above for anything other than the Bitmain APW3-12-1600-B2. I am in the US and had to change my circuit breaker to 220 to be able to run this and get these results, but I may have to do this for more of them.

Prelude

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So I got my shipping notification from bitmain via email this morning.

Interesting that bitmain claims that it was supposed to be shipped on the 28th of September but it only went out on the 8th of October. Guess they decided to stress test it for another 12 days to make sure I got a good unit! Roll Eyes

Cassey

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Quote from: NotFuzzyWarm on October 12, 2015, 10:44:35 AM

Ditto^^ Never EVER provide your SSN (for those not in the USA, Social Security Number) to a caller over the phone! Always find out who they are (in this case DHL), look up the local phone number for them and contact them yourself to be certain it is legit.

I agree with the advise, of course... and I didn't follow it. My reasoning was flawed but A) I was expecting a shipment B) They identified the sender, basic product, and price category C) It was end-of-day on Saturday and I didn't want to risk further delays D) Compliments of the recently announced Scottrade hack, I have 1 year of credit protection services.

Obviously, I'm going to seriously regret doing this if it was a crooked DHL employee gathering data for resale on the black market.

Mostly I am just curious if other Bitmain customers ordering 2 or more units and shipping via DHL received such a call?

NotFuzzyWarm

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Quote from: Dr Charles on October 12, 2015, 10:33:16 AM

Quote from: Cassey on October 12, 2015, 10:11:39 AM

Quote from: dannygroove on October 08, 2015, 03:32:11 PM

Update:
Scheduled Delivery:
Monday, 10/12/2015, By End of Day

Last Location:
Departed - Shenzhen, China, Thursday, 10/08/2015

Im thinking that if you ordered 1 day ahead of me your order will be shipped tomorrow? Good luck. And never buy batch 1 from Bitmain again : )

I got a weird call from someone identifying themselves as DHL Saturday night. They indicated I had a shipment from China worth over $2500 in customs and they needed my SSN to process it. Is this a new US Government action? This is the first time I've exceeded that value in a single order.

I have not heard anything from BitMain, but I did get two text from DHL yesterday. The first one came in the morning and had a bad tracking number. The second came last night and is the same as above. FYI - my order date was 9/2/2015. Now just hoping I don't miss the doorbell ringing.

I would call DHL direct before ever providing my ssn to someone on the phone. Just to make sure.

Ditto^^ Never EVER provide your SSN (for those not in the USA, Social Security Number) to a caller over the phone! Always find out who they are (in this case DHL), look up the local phone number for them and contact them yourself to be certain it is legit.

Cassey

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Quote from: torepia on October 12, 2015, 10:21:34 AM

I'm pretty sure this is normal. I don't know what a "SSN" is (Norwegian). But I got similar request from UPS. They would not ship the packages from China before I had pre-paid the 25% VAT (import tax basically). They also explained this would not have happend if Bitmain had supplied them with a proper invoice with the package. Instead they use a form (don't remember what it's called), that the Norwegian customs don't approve. UPS actually just sent me a text "Please transfer 3100$ to this account number to continue the shipping process" They also provided me with a tracking number.

Still haven't heard a word from Bitmain since they got my money.

Sorry - Social Security Number. The one thing most of us USA folks have been trained to NEVER give out over the phone unless you know who is calling you (like your stockbroker!). Its the foundation for identify fraud here.

Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 313. (Read 527809 times)