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

[dmwardjr]

High Rpms are at the exhaust

Agreed...  I have rigs like this but high RPM's at the intake.  I haven't bothered to take the time to see if the fans are different.

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[wolfen]

High Rpms are at the exhaust

Agreed...  I have rigs like this but high RPM's at the intake.  I haven't bothered to take the time to see if the fans are different.

Some fan hubs are bigger , it is glaring.
You could put both intakes on one both exhaust on the other
Then crank down the fan speed on the fast ones

[dmwardjr]

High Rpms are at the exhaust

Agreed...  I have rigs like this but high RPM's at the intake.  I haven't bothered to take the time to see if the fans are different.

Some fan hubs are bigger , it is glaring.
You could put both intakes on one both exhaust on the other

I thought some had different fans on front and rear.  Some the same fans.

[wolfen]

One fan has a longer cable

[dmwardjr]

One fan has a longer cable

LOL

Come on now.

[wolfen]

One fan has a longer cable

LOL

Come on now.

Yep

front has short cable, rear long.

[nhando]

All my S7 fan speed is set to manual at 60%.   Is there a reason why the speed is not at a steady speed?  I have some that is showing 3700/4080 RPM and some showing 4040/4440 and 4040/4800!  The 2 screetching ones are the ones that happens to be on the higher RPMs.   Is FAN 1 the Intake FAN or EXHAUST fan?

I'm curious...  Have a close look at the front and rear of the rigs to see if they are the exact same fan.  They may actually be different.  I have seen post in the past in this forum with different fans on rigs.

They are facing different direction so it's hard to tell unless I unscrew them.  I may end up doing that tomorrow to replace the FAN with the SANYO.

[nhando]

One fan has a longer cable

LOL

Come on now.

Yep

front has short cable, rear long.

When you say Front......you mean the side with the Network interface?  That is the Intake fan where it have the shorter cable.  The rear is with the Longer fan cable is the Exhaust FAN.   What is the best way to test which is FAN 1?  I have my PSU connected to 3 S7, and would hate to shut them all down for a test.   Heck, let me test it now as my curious is getting to me.  Will do a power down and remove 1 FAN connector.

UPDATE - FAN 1 is the Intake FAN.  I also took this opportunity to reboot the 3 S7 and now they all report similar FAN speed at 60%.  I also used this opportunity to replace 1 FAN with the SANYO FAN.  Because the replacement FAN is different it's only natural to see the RPM reported being different.  The Intake fan appears identical to exhaust fan but it's hard to know for sure as there's no model #, just similar looks. The screeching is now gone so I'll do a stability test for a week and if it keeps temps good without issues, I may order another to replace the other S7  Fan.  


Just a bit concerning that Amazon report this FAN using up to 3AMP or 36 Watts.  Although I did hear report that people previously used these FANs on the S4 without any issues.   So far it's keeping the temp at the same as before the replacement.

http://www.amazon.com/gp/product/B00QWB1X3O?psc=1&redirect=true&ref_=oh_aui_search_detailpage

Anyone know what the OEM fan uses watts wise?  Bitmain site doesn't show and Ebay info is not trust worthy as those are not the OEM fans since they're showing it can only go up to 4500RPM vs 5K for the OEM version.

[nhando]

Just saw 1 S7 reporting 2 cards with 45 Chips and 1 Card with 20 Chips and Hash rate was crap.  Reboot fix the issue but that was concerning and weird.  Anyone else ever see these issues or am I just very lucky?

[cryptichermit]

Edit: To make it clear, this is a shipping company screw-up, not bitmain's fault.

Then take issue with the shipping courier.  If you don't receive the goods then file a loss claim and make them reimburse you.

[Rabinovitch]

Try to disconnect one fan during running and you will see result - it will stop hashing.

Is there any way to avoid stopping?

[clgrissom3]

Then take issue with the shipping courier.  If you don't receive the goods then file a loss claim and make them reimburse you.

The goods are supposed to be picked up and delivered to me tomorrow. My concern is sabotage of the equipment by the other miner.

Why would you think that way...there are still some good people in this world.  He has the same interests as you and would probably go out of his way to protect your package.  Hell, he is probably someone on this forum!

[notlist3d]

Why would you think that way...there are still some good people in this world.  He has the same interests as you and would probably go out of his way to protect your package.

Because I've been in bitcoin long enough to have to deal with plenty of people that act in such ways. I do hope they are good people and there are no problems. I'm just trying to prepare if there are problems.

This is like giving FedEx trucks to UPS by mistake, you would hope they would be well cared for, but you might wonder if there is sugar in the gas tank and cut brake lines at the end of the day. Competition and greed can bring out the worst in some people.

I'm willing to bet it is a mistake on shipment they saw the large order you mention and assumed your box was one of them.  Committing mail fraud as a carrier... not exactly worth doing for a S7.  I think it was a screw up it sounds like for sure but sabotage.

Your option is either take package or mess with carrier for who knows how long and if they will side with you.  You might call a supervisor and explain your worries and see what they do.  But I doubt there is a whole lot besides taking it or letting them ship it back.

[cryptichermit]

Then take issue with the shipping courier.  If you don't receive the goods then file a loss claim and make them reimburse you.

The goods are supposed to be picked up and delivered to me tomorrow. My concern is sabotage of the equipment by the other miner.

If you're concerned about it you could:
Have driver stay a couple minutes and watch you un-box to check for any signs of damage/tampering.
If there is, tell the driver you refuse acceptance of the package and have them return it and start a damage claim.

If there isn't physical sign of damage and you're still paranoid about functionality of item you can film yourself, nonstop.
Film from receipt of package, unboxing, hooking up, and configuring pools and watching GUI statistics.  If it doesn't work right from get go
you contact Bitmain and say it's DOA.  They probably are tracking SN#'s (I would be).  If they do then they can verify they are same parts.

Maybe you'll find an S3 in the box instead of an S7 - LOL..  Of course then you could also refuse the shipment as it's not what you were expecting.

[notlist3d]

Then take issue with the shipping courier.  If you don't receive the goods then file a loss claim and make them reimburse you.

The goods are supposed to be picked up and delivered to me tomorrow. My concern is sabotage of the equipment by the other miner.

If you're concerned about it you could:
Have driver stay a couple minutes and watch you un-box to check for any signs of damage/tampering.
If there is, tell the driver you refuse acceptance of the package and have them return it and start a damage claim.

If there isn't physical sign of damage and you're still paranoid about functionality of item you can film yourself, nonstop.
Film from receipt of package, unboxing, hooking up, and configuring pools and watching GUI statistics.  If it doesn't work right from get go
you contact Bitmain and say it's DOA.  They probably are tracking SN#'s (I would be).  If they do then they can verify they are same parts.

Maybe you'll find an S3 in the box instead of an S7 - LOL..  Of course then you could also refuse the shipment as it's not what you were expecting.

If your going to do anything like make driver stay during setup I highly suggest calling supervisor with your worries, and get the backing of a supervisor.   I can't imagine to many sitting there as you set it up even if it's just 10 minutes.  

And also by doing this you will make your delivery guy chances are not to happy with you.  If you deal with receiving many packages I always try to stay on good side of delivery guy when you can.  You would be surprised if you are nice sometimes it pay's off.

I'm willing to bet it is a mistake on shipment they saw the large order you mention and assumed your box was one of them.  Committing mail fraud as a carrier... not exactly worth doing for a S7.  I think it was a screw up it sounds like for sure but sabotage.

Your option is either take package or mess with carrier for who knows how long and if they will side with you.  You might call a supervisor and explain your worries and see what they do.  But I doubt there is a whole lot besides taking it or letting them ship it back.

I just mean sabotage as in good chances my boxes were opened and inserted into the datacenter without looking at address label. When they have to package them back up, a dishonest person might throw their poor performers in my boxes to let me have to deal with warranty issues. Or perhaps they will even cause damage to reduce or cause problems for competition.  I don't mean they colluded with the carrier.

My order was for more than five, their order was for hundreds. Easy to not even realize the mistake when unboxing that number. The question is, will they pick random machines to send me, or will I end up with the runts of the litter?

The good news is if they deal with in the hundreds, I'm willing to bet a RMA or boards is not a issue.  Chances are Bitmain get's to them pretty quick.  So I don't think they would take the time to pull 5 duds to send to you. But I see your point.

If you see they are opened and really do suspect that you can call supervisor and try to make sure the driver stay's.  But setting up 5+ with driver sitting there chances are low.  And again this is going to make you the drivers not so favorite client... so you would be between a rock and hard place if you suspect they are duds.

[cryptichermit]

Yes, I really like my regular driver. I will ask him to stay for a quick opening and visual inspection, and video the rest of the process.

Yeah, I never meant to have the driver stay for cookies and milk - that'd be absurd.
Just to unbox and verify no physical damage.

[MyRig]

@AgentCash

I think your situation is being taken care of as I post if I think the case is what I think it is.  Sent you a PM, please let me know.

Can't disclose the details of the transaction here but more than likely you will receive unopened boxes if this is the same case I'm thinking of. (There may be 1 box that's been opened but it should be to validate unit in functioning state)

P.S:  we can understand you being worried and very much so but please be patient with UPS at the moment as situation is being dealt with.


Thank you!

[not.you]

Just saw 1 S7 reporting 2 cards with 45 Chips and 1 Card with 20 Chips and Hash rate was crap.  Reboot fix the issue but that was concerning and weird.  Anyone else ever see these issues or am I just very lucky?

My batch 8 did something weird once after a power cycle where one board kept dropping out (exactly like some S5's do) where the hashrate went down by a 3rd and the temperature on one board went way down.  No dashes or x's or missing chips in the GUI though.  I did a "save and apply" to restart cgminer and it worked as expected again for about 20 minutes and then did the exact same thing again.  I did another "save and apply" and again it fixed it for about 20 minutes.  I was a bit worried by then since it had done it three times.  I power cycled it again after that and it has not done it since (a couple weeks now).  So that was weird and concerning (just as you say) but the unit seems ok now.

With some S5's though this behavior happens and then fixes itself after a few minutes.  I try to keep a close eye on my S7's but it is possible it is happening and fixing itself and I just haven't observed it again.

[Moria843]

Anybody have an S7 coupon they can't use and willing to donate?

[torepia]

Anybody have an S7 coupon they can't use and willing to donate?

Are people getting coupons? At least I didn't get any on my batch 1 order.