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

[-droid-]

One heatsink in a b7 I have fell off when moving the miner to a diff location.

Could I potentially buy a small adhesive rPi heatsink to replace it?

[hawkfish007]

One heatsink in a b7 I have fell off when moving the miner to a diff location.

Could I potentially buy a small adhesive rPi heatsink to replace it?

I was told the following by Sherri. If it's not done right, you risk burning the chip.

"Carry and setting gently when assembling  the hash boards. Since the heat sinks are glued on the hash boards directly(it is not firm enough), they can easily knocked off.

If there have heat sinks drop out from the hash boards ,please do not use it any more and contact us asap! You cant fixed it in your side or the warranty will be void！

If the boards are burnt due to lack of the heat sinks ,you need to cover the repair cost."

[notlist3d]

One heatsink in a b7 I have fell off when moving the miner to a diff location.

Could I potentially buy a small adhesive rPi heatsink to replace it?

I was told the following by Sherri. If it's not done right, you risk burning the chip.

"Carry and setting gently when assembling  the hash boards. Since the heat sinks are glued on the hash boards directly(it is not firm enough), they can easily knocked off.

If there have heat sinks drop out from the hash boards ,please do not use it any more and contact us asap! You cant fixed it in your side or the warranty will be void！

If the boards are burnt due to lack of the heat sinks ,you need to cover the repair cost."

If you do it your side you give up any warranty.  So I personally would contact bitmain and see about RMA on the 1 blade.  It does stink on downtime.... but if they see you tried to repair it it's hard to tell what they will charge vs free.  I would use the warranty.

If you were out of warranty I would look for solutions like you mention.  But I think risk vs reward is to great with intact warranty.

[nhando]

One heatsink in a b7 I have fell off when moving the miner to a diff location.

Could I potentially buy a small adhesive rPi heatsink to replace it?

What batch is this?  Wow that is not good to hear that heatsinks are falling just from regular relocation.  How did you find out 1 fell off?  Did the temperature spike up on 1 of the card or did you just happened to be looking and coincidentally saw this?

[-droid-]

One heatsink in a b7 I have fell off when moving the miner to a diff location.

Could I potentially buy a small adhesive rPi heatsink to replace it?

What batch is this?  Wow that is not good to hear that heatsinks are falling just from regular relocation.  How did you find out 1 fell off?  Did the temperature spike up on 1 of the card or did you just happened to be looking and coincidentally saw this?

Batch 7

I heard a clinking sound and took off rear fan and saw it popped off the end of blade 1

Also looking at it more there's another heatsink that popped off in the middle of blade 2

[nhando]

Does those 2 boards report much higher temperature as a result compared to the 3rd hash board?  Curious as I want to be able to spot these issues in the future if it happens remotely.

[notlist3d]

Does those 2 boards report much higher temperature as a result compared to the 3rd hash board?  Curious as I want to be able to spot these issues in the future if it happens remotely.

I think he got lucky.  It would be very easy not to notice it, which is the scary part.  And the heats sinks are made of metal so if they hit the wrong spot on the board it can be a very bad result.

With 2 having issues Droid was there anything in common you noticed? Or just plan bad luck.

[-droid-]

Does those 2 boards report much higher temperature as a result compared to the 3rd hash board?  Curious as I want to be able to spot these issues in the future if it happens remotely.

I think he got lucky.  It would be very easy not to notice it, which is the scary part.  And the heats sinks are made of metal so if they hit the wrong spot on the board it can be a very bad result.

With 2 having issues Droid was there anything in common you noticed? Or just plan bad luck.

I hadn't even tried to run them, I noticed as I was moving them the clanking.. I think they may have fallen off after placing them on their new shelf.. Maybe the litte thump from setting them down was enough to just pop off

[notlist3d]

Does those 2 boards report much higher temperature as a result compared to the 3rd hash board?  Curious as I want to be able to spot these issues in the future if it happens remotely.

I think he got lucky.  It would be very easy not to notice it, which is the scary part.  And the heats sinks are made of metal so if they hit the wrong spot on the board it can be a very bad result.

With 2 having issues Droid was there anything in common you noticed? Or just plan bad luck.

I hadn't even tried to run them, I noticed as I was moving them the clanking.. I think they may have fallen off after placing them on their new shelf.. Maybe the litte thump from setting them down was enough to just pop off

Interesting I'm glad you found it before any damage.  That is kinda scary if caused from just moving shelf's.   I was not guessing something as little as that was cause.  Thanks for sharing.

[-droid-]

Does those 2 boards report much higher temperature as a result compared to the 3rd hash board?  Curious as I want to be able to spot these issues in the future if it happens remotely.

I think he got lucky.  It would be very easy not to notice it, which is the scary part.  And the heats sinks are made of metal so if they hit the wrong spot on the board it can be a very bad result.

With 2 having issues Droid was there anything in common you noticed? Or just plan bad luck.

I hadn't even tried to run them, I noticed as I was moving them the clanking.. I think they may have fallen off after placing them on their new shelf.. Maybe the litte thump from setting them down was enough to just pop off

Interesting I'm glad you found it before any damage.  That is kinda scary if caused from just moving shelf's.   I was not guessing something as little as that was cause.  Thanks for sharing.

Yeah I ordered a couple rPi heatsinks after I saw the sink on the end tumbling around, but then realized a second one was loose also. Just sent an email to Sherry to see what she wants me to do

Also on another note

Has anyone had issues sliding two together and the two getting stuck?  I've got a B7 and B8 slid together with the aluminum rails and for the life of me I can't slide them apart now. Seems maybe the metal swelled or there might have been a little shard of aluminum on the track and wedged itself in there causing it to jam up.  I'm probably going to have to keep them permanently together now lol

[OgNasty]

Dang I hope they get it fixed up this time, that does sound like a pain.  Out of curosity when you say using EVGA PSU's are you using EVGA 1600's?

Just was curious on which EVGA PSU it was.   

I use 2 EVGA 1300s for each S7.  I've got a bunch laying around.

[djroadking]

I'll finally get my S7 tomorrow and will be able to update you guys on if I have a customs charge from UPS or not. Hopefully the miner doesn't have any issues but seeing as plenty of you are having problems with dead boards or heatsinks falling off... I guess I should be expecting something.

[Elphamyto]

Can someone with Bitmain RMA experience or familiarity tell me the best way to get in touch with Bitmain. I need to RMA a defective board from Batch 9 and I've had a support ticket open for a few days now w/o response. I realize this isn't a support thread, but I see that several people here have been through the process of returning boards. There is an email for xiaorui.liu@bitmain.com on their workOrderGuide web page, but I don't know if that's for initiating a return. Thanks 

[notlist3d]

Can someone with Bitmain RMA experience or familiarity tell me the best way to get in touch with Bitmain. I need to RMA a defective board from Batch 9 and I've had a support ticket open for a few days now w/o response. I realize this isn't a support thread, but I see that several people here have been through the process of returning boards. There is an email for xiaorui.liu@bitmain.com on their workOrderGuide web page, but I don't know if that's for initiating a return. Thanks 

RMA requests are actually info@bitmaintech.com on email's.  So I would send a email that way.

I will warn they have got harder on warranty. Don' t take apart and try to fix or they consider it voiding warranty unless you had permission.

[mavericklm]

OgNasty, I'm sorry to hear that, maybe it helps a tinny bit

The rma process is a mess, quality control....

Let's hope we will have broader market with bitfury and BW coming in!

[djroadking]

Just got my S7 from UPS. Had to pay a $5 dollar service charge but that's nothing.

[Entropize]

The batch 9 s7 only has 3  hookups on the controller for boards, I can see where on the board the other 6 would go but I'm not taking a soldering iron to the thing. No more controlling more than one s7 with 1 controller board.

[hawkfish007]

The batch 9 s7 only has 3  hookups on the controller for boards, I can see where on the board the other 6 would go but I'm not taking a soldering iron to the thing. No more controlling more than one s7 with 1 controller board.

Someone reported to receive B9 with 6 fan ports and 9 ports for boards.

[alh]

The batch 9 s7 only has 3  hookups on the controller for boards, I can see where on the board the other 6 would go but I'm not taking a soldering iron to the thing. No more controlling more than one s7 with 1 controller board.

Someone reported to receive B9 with 6 fan ports and 9 ports for boards.

Nothing says that they MUST be uniform across the batch. As long as the controller has the required ports to run what they ship, Bitmain has fulfilled their obligation. Maybe somebody got lucky and got an earlier batch controller, or possibly a new batch for a possible S7+.

Good that folks report what they get though. Buyers just should NOT depend on it being something more than is required.

[djroadking]

Have my S7 running Due to the amount of noise it makes I underclocked it's frequency to 400. Getting 3TH at that rate. Whenever I find a better place to keep it running I'll up the frequency a bit. There's no way that I'll be sleeping with it in my room.