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

[nhando]

I have copied my post with my customer service experience and sent it to myself in a PM as future reference if I should have to post it in the forum again.  We will see how long this takes for me to get my 3 replacement blades for Batch 8 S7's.

If it continues to take much longer, I will have to WARN everyone... plain and simple.  I still cannot comprehend WHY it is taking more than 30 days to get 3 replacement blades.  They have my old ones but that's not doing me any good cause the blades cannot work towards ROI without being in my possession.  This is quite frustrating.

I would be pissed too.   Each month of Prime time right now is over $300 in loss revenue per S7.  Now imagine if you have many more S7, the potential for this to happen is even greater.   It's not cool when the vendor does not provide a timely fix for a time critical business  like this, especially when you have to factor in the difficulty increase.  Those same 3 boards hashing potential won't be the same when they send it out 1 or 2 months later. It would make sense if they offer an option to pay a deposit for the RMA and ship you a new board right away.  When the board arrives and if in fact it's bad and under warranty, they can return your deposit.  IF it doesn't qualify then they can just hold your deposit money which is the equivalent cost of the replacement.  I would really hate to be in your position DMwardjr as I was only down for 1 day for power upgrade and I was already getting anxious and counting my missed revenue.  I can't wait for the Avalon 6 to drop below $1K on a group buy so I can diversify my vendors.

P.S I hope they offer you a coupon for this delay.   

[torepia]

So we have installed a bunch of S7's on our network along with our existing SP35's.  Every time we power on the S7 racks our whole network goes to shit....We have >150 SP35's and just installed >200 S7's.  They are all static IP's on our 10.x.x.x VLAN. We've got layer 3 switches, and Pfsense router that can handle over 8 million simultaneous connections..... I don't understand what the ants could be doing to cause such havoc... Any thoughts would be appreciated.  Day 3 of no sleep trying to figure this out....

Whats the hardware specs on the router? What switches do you have?
I just did a wireshark capture of the traffic from a miner. It basically just sends traffic back and forth the pool, and occasionally some ntp traffic. So no broadcast noise or anything like that.
I'm gonna put my money on crappy switches

You could try seperating the miners into smaller groups on their own VLANs, and if possible balance some of the load from the different VLANs onto different interfaces on the PFsense router.

Do you have a topology drawing? I'd love to help you out if I can.

[wikkidtt]

so what my best option to power one of these. i have a 240v 30amp circuit available.

was looking at there power supply and it seems to be efficent but didn't know if there is a better and cheaper option?

Thanks In Advance

[torepia]

so what my best option to power one of these. i have a 240v 30amp circuit available.

was looking at there power supply and it seems to be efficent but didn't know if there is a better and cheaper option?

Thanks In Advance

Bitmains PSU is the best for the purpose IMO. If you go for a standard ATX PSU with 1300W+, its gonna be huge, expensive and "hard to work with" aka messy.

[thedreamer]

so what my best option to power one of these. i have a 240v 30amp circuit available.

was looking at there power supply and it seems to be efficent but didn't know if there is a better and cheaper option?

Thanks In Advance

Bitmains PSU is the best for the purpose IMO. If you go for a standard ATX PSU with 1300W+, its gonna be huge, expensive and "hard to work with" aka messy.

I wouldn't say that. I use EVGA 1300 power supplies with ZERO issues across multiple platforms of miner generations. I have had about 12 of them for the past year+ with zero problems, burned wires, shorts etc.. I'd say that pretty much trumps the Bitmain junkers.

[cryptichermit]

Update:

Got email from Bitmain/Sherry with tracking number for 2 x batch 5 replacement boards. +1
Got email in regards to batch 8 defective boards. +1

Should have happened a lot earlier, but at least we got some movement going in the right direction.

thanks, 

[torepia]

Maybe a silly question, but are people still buying S7's? At this diff?

[nhando]

so what my best option to power one of these. i have a 240v 30amp circuit available.

was looking at there power supply and it seems to be efficent but didn't know if there is a better and cheaper option?

Thanks In Advance

Depends on how many you're looking to power.  The Bitmain PSU is very noisy but is quite efficient.  Per S7, it's not cheap, nor the EVGA G2 option.  You can see many people who own many S7 in this forum use the IBM 2K, 2880W, 2980W PSU and you get much better value per S7.  I'm using Dual IBM 2KW PSU to power 3 x S7 using j4bberwock 4K board.  Works like a champ and it's cheaper than $100 per S7 to power so you're saving a lot of money and when paired with the Ultra KAZE fans.  They're super quiet.  The foot print is much smaller than 3 x BitMain PSU or even EVGA.  I also own the EVGA G2 1300W and they're also very nice and quiet, but too pricey per S7 and you will need to buy extra cables or connect to only some of the ports.  If you have 240V, server PSU is the way to go. See how clean my cable management and how tiny those 2 PSU stacked on each other is.  My plan is to stack 4 of them on top of each other and be cooled by 4 x Ultra KAZE fans side ways.

https://i.imgur.com/h9eJbwK.jpg

[nhando]

Maybe a silly question, but are people still buying S7's? At this diff?

I am, ordered 8 x Batch 9.  Price is reasonable especially at today's price of $1020.

[IITravel01]

Anyone have a chart to show the power at each frequency for the B8/B9 S7's?  I'm wondering what frequency to downclock it to to get the closest to 1250w Max.

[SLEI]

Anyone have a chart to show the power at each frequency for the B8/B9 S7's?  I'm wondering what frequency to downclock it to to get the closest to 1250w Max.

I have made measurements, You can find them in this topic.

My early batch 8 takes 1210W with 700Mhz but don't get to advertized 4,73 Th/s, my other late batch 8 takes 200W juice and can go a lot higher freqs.


Batch 9 is not shipped so power draw is unknown.

[AriesIV10]

Is there any news on a more efficient Miner...S8?

[not.you]

Is there any news on a more efficient Miner...S8?

Typically the even numbered models use the same chips as the previous odd numbered models so it probably wouldn't be more efficient, just more hashrate.  If they introduce another higher hashrate with the same chips it will probably be an S7+ though.  The next jump in efficiency should be an S9.

Also just putting it out there but last night I lost internet for 10-15 minutes, didn't find out until this morning, and both of my S7's set to 60% manual fans did just fine.  One is batch 5 with original firmware and one is batch 8 also with original firmware.

[padrino]

Is there any news on a more efficient Miner...S8?

Typically the even numbered models use the same chips as the previous odd numbered models so it probably wouldn't be more efficient, just more hashrate.  If they introduce another higher hashrate with the same chips it will probably be an S7+ though.  The next jump in efficiency should be an S9.

Also just putting it out there but last night I lost internet for 10-15 minutes, didn't find out until this morning, and both of my S7's set to 60% manual fans did just fine.  One is batch 5 with original firmware and one is batch 8 also with original firmware.

There may be a possibility of a higher chip count system running a lower average clock rate as an incremental efficiency increase...

[-droid-]

im debating buying 3 B8 or B9.. difference in price is slowly dropping each day, but the 20th is almost here for B9

also.

has anyone had issues with connecting two units together with the slide rails? i connected a B7 with a B8 and for the life of me it will not slide apart now.. its like permanently stuck in the rail jammed up and wont slide either direction

[dmwardjr]

Is there any news on a more efficient Miner...S8?

Typically the even numbered models use the same chips as the previous odd numbered models so it probably wouldn't be more efficient, just more hashrate.  If they introduce another higher hashrate with the same chips it will probably be an S7+ though.  The next jump in efficiency should be an S9.

Also just putting it out there but last night I lost internet for 10-15 minutes, didn't find out until this morning, and both of my S7's set to 60% manual fans did just fine.  One is batch 5 with original firmware and one is batch 8 also with original firmware.

There may be a possibility of a higher chip count system running a lower average clock rate as an incremental efficiency increase...

Is that what was done with the S4+ and the S5+?

[dmwardjr]

Update:

Got email from Bitmain/Sherry with tracking number for 2 x batch 5 replacement boards. +1
Got email in regards to batch 8 defective boards. +1

Should have happened a lot earlier, but at least we got some movement going in the right direction.

thanks, 

Update:

I too received an email notification of my 3 replacement blades on the way and got a UPS shipment notification of package on the way from China.

[dmwardjr]

Is there any news on a more efficient Miner...S8?

Typically the even numbered models use the same chips as the previous odd numbered models so it probably wouldn't be more efficient, just more hashrate.  If they introduce another higher hashrate with the same chips it will probably be an S7+ though.  The next jump in efficiency should be an S9.

If the S7+ comes out and looks similar to an S5+, I would rather continue buying S7.  The only way I would buy S7+ is if I could buy complete controllers and not just a BB Board without the Interface board for the fans and blades.

[AriesIV10]

Update:

Got email from Bitmain/Sherry with tracking number for 2 x batch 5 replacement boards. +1
Got email in regards to batch 8 defective boards. +1

Should have happened a lot earlier, but at least we got some movement going in the right direction.

thanks, 

Update:

I too received an email notification of my 3 replacement blades on the way and got a UPS shipment notification of package on the way from China.

I just received  a notification email with tracking number for 1 hashboard that went out in early Dec.  I still have one other RMA for 1 controller and 3 hashboards.

[dmwardjr]

I just received  a notification email with tracking number for 1 hashboard that went out in early Dec.  I still have one other RMA for 1 controller and 3 hashboards.

HOPEFULLY, your other RMA gets worked out soon.  I think they may of had a lot of RMA's and it's taking a while to get to all of them.

EDIT:  Call them if you think you need to.  I called them.

EDIT #2:  I use ooma [Voice over IP].  You can find it at ooma.com.  It cost me 2.35 cents ($0.0235) per minute to talk to someone in China.  My monthly bill is less than $4 each month.  I prepay [or load up] my account for calling outside North America.  All calls made in North America are free [Well, $4.00 each month].  You will have to pay for the ooma base up front then it's cheap from there on out.  I bought mine used on eBay for cheaper than what you would pay on their website.  Your choice though.