Hot cables on S3, what am I doing wrong?

[olliec420]

I have an S3+ and an S1 converted to S3.  We had a storm and my hash rate dropped so I went to see what was up and I found this....





Power supply is a Corsair TX850 btw.

So the drop in hash rate was the S1->S3 conversion apparently had one of the boards fail most likely from the storm.  The S3+ power cable was way hot when I touched it and I unplugged it and the the connector basically fell apart.  Now the 850 should be plenty to run these two.  What am I doing wrong here?  The burnt ends were the negative cables if that helps.

Now see this pic:


This is the S1/S3, its connectors seemed to get a lil warm, enough to discolor the plastic but they weren't very warm to the touch at the moment but the warm was on the positive side.  Not negative like the other miner.  I don't get it.  

Lastly, I'm going to change to these PSUs with these adapters.


What gauge wires should I be using and how many PCIe connections should i take off each of these Dell PSUs?

Thanks for the help

[dunand]

Change your cable for 16 awg. Use a kill-a-watt to monitor if your miner is working properly.

[adaseb]

I am thinking that there was a voltage surge and your PSU got damaged and let too much current into the miner. Generally its not a good idea to keep miners running during a storm.

[MCHouston]

Since all the heat seems to be concentrated at the connection you should of had a bad connection on the pin or corrosion that caused them to over heat.  S3+ should not have problems like that even with 18 AWG.

[notlist3d]

How did you have the power plugged in?  Did you have 2 pcie plugs plugged in from same power cord on each side?   IE one power cord and split into 2 pcie plugs.

[olliec420]

How did you have the power plugged in?  Did you have 2 pcie plugs plugged in from same power cord on each side?   IE one power cord and split into 2 pcie plugs.

The corsair has 4 individual cables with pcie connectors coming out of it, i have two in each miner.  I don't know about the rails on the inside of the PSU though.  They may be basically together inside the case.  Im going to switch to those Dells as soon as I can get some PCIe cables in.

I am thinking that there was a voltage surge and your PSU got damaged and let too much current into the miner. Generally its not a good idea to keep miners running during a storm.

Yes I agree that is probably what happened to the one with the board that quit working.  Its in the server room at my office.  Living in FL, I can't unplug during every storm or it would never be plugged in LOL.

Since all the heat seems to be concentrated at the connection you should of had a bad connection on the pin or corrosion that caused them to over heat.  S3+ should not have problems like that even with 18 AWG.

I pay pretty close attention to detail and I didn't see anything out of the ordinary on the connector or the pins.  I also thought an s3+ shouldn't have problems like that on an 850 watt psu, granted there we're 2 s3s on this psu but still.

[QuintLeo]

Possible the "other" connector on the board with the fried connector got loose.

[philipma1957]

loose connections  cause  arc and melting. corrosions to the cable can occur over time.


also    if you run at freq 237 or higher the s-3's pull juice at 400 watts.  so 800 watts on a 850 watt psu is hard on the psu . do it for months and the psu cap's age.  So after 6 months you have maybe a 780 watt psu.


I run 2 s-3's on 1000 watt psu.  a seasonic platinum been running about 2 or 3 days less then a year.  24/7/365  no worries.

check this review

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=126

on page 2 when you go up to  849 watts dc  the efficiency drops like a mofo.  down from 83% to 80%

BTW 83% sucks and that is at 681 watt dc .

 I know 2 s-3s pull more then that  my guess is you pushed it too hard too long.

[olliec420]

loose connections  cause  arc and melting. corrosions to the cable can occur over time.


also    if you run at freq 237 or higher the s-3's pull juice at 400 watts.  so 800 watts on a 850 watt psu is hard on the psu . do it for months and the psu cap's age.  So after 6 months you have maybe a 780 watt psu.


I run 2 s-3's on 1000 watt psu.  a seasonic platinum been running about 2 or 3 days less then a year.  24/7/365  no worries.

check this review

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=126

on page 2 when you go up to  849 watts dc  the efficiency drops like a mofo.  down from 83% to 80%

BTW 83% sucks and that is at 681 watt dc .

 I know 2 s-3s pull more then that  my guess is you pushed it too hard too long.

hmm interesting, some things there i didn't know.  I run them at stock freqs btw.  Im going to put them on the dells just to be safe.  Thanks.

i run at 218 freq btw

[pekatete]

hmm interesting, some things there i didn't know.  I run them at stock freqs btw.  Im going to put them on the dells just to be safe.  Thanks.

Just remember to un-plug and re-plug the 6 pin PCI-E cables every blue moon ..... or whenever you do your power reboots.

[philipma1957]

hmm interesting, some things there i didn't know.  I run them at stock freqs btw.  Im going to put them on the dells just to be safe.  Thanks.

Just remember to un-plug and re-plug the 6 pin PCI-E cables every blue moon ..... or whenever you do your power reboots.

@ op

 this is good advice   especially if it is humid by the miners.

[navigator]

I use the CX500 on my s3's. It's way cheaper to buy many of them. I ran my s3's at 250 until recently went back to stock to accommodate summer heat. Cables would only get mildly warm. You can get a CX500 for $25 currently after $20 rebate.

[Finksy]

4 cables are not required on the S3 for any clocking, and it is highly unlikely that would have prevented the damage to the cables.  Also, the S3+ upgrade kits were actually just as if not more stable/reliable than the original S3/S3+'s offered by Bitmain.  Wish they would do more upgrade kits, I loved mine and still run them.

[navigator]

I use the CX500 on my s3's. It's way cheaper to buy many of them. I ran my s3's at 250 until recently went back to stock to accommodate summer heat. Cables would only get mildly warm. You can get a CX500 for $25 currently after $20 rebate.

The CX series is a lower tier psu then the one that OP is using, this isn't a good idea or at least if you home mine and don't want anything to catch fire while you're asleep. I say test the miner and make sure you are using all four pci plugs, weird this happened but I suspect there is an issue on the upgrade kit, could be a faulty issue that was overlooked by bitmain since the kit wasn't popular.

I have ran S3's oc'd on CX500 for over 1.5 years with zero problems.

[Antuam]

What firmware do you install in the S3?.

I had the same problem, and one January firmware have a issue with voltage. My S3 was burn and loss it.

I recommend install the last firmware if you have not OC or November firmware and update the CGMINER of Kano.

Regards.
Antuam

[spazzdla]

wall outlet > ups > power supply

UPS will eat the power spikes.

[VirosaGITS]

How did you have the power plugged in?  Did you have 2 pcie plugs plugged in from same power cord on each side?   IE one power cord and split into 2 pcie plugs.

The corsair has 4 individual cables with pcie connectors coming out of it, i have two in each miner.  I don't know about the rails on the inside of the PSU though.  They may be basically together inside the case.  Im going to switch to those Dells as soon as I can get some PCIe cables in.

I am thinking that there was a voltage surge and your PSU got damaged and let too much current into the miner. Generally its not a good idea to keep miners running during a storm.

Yes I agree that is probably what happened to the one with the board that quit working.  Its in the server room at my office.  Living in FL, I can't unplug during every storm or it would never be plugged in LOL.

Since all the heat seems to be concentrated at the connection you should of had a bad connection on the pin or corrosion that caused them to over heat.  S3+ should not have problems like that even with 18 AWG.

I pay pretty close attention to detail and I didn't see anything out of the ordinary on the connector or the pins.  I also thought an s3+ shouldn't have problems like that on an 850 watt psu, granted there we're 2 s3s on this psu but still.

I see, this must be the miner we discussed. I would like to know, were the PSU plugged in a surge protection power bar? I have mine on and i assumed they are safe from surges.

[olliec420]

How did you have the power plugged in?  Did you have 2 pcie plugs plugged in from same power cord on each side?   IE one power cord and split into 2 pcie plugs.

The corsair has 4 individual cables with pcie connectors coming out of it, i have two in each miner.  I don't know about the rails on the inside of the PSU though.  They may be basically together inside the case.  Im going to switch to those Dells as soon as I can get some PCIe cables in.

I am thinking that there was a voltage surge and your PSU got damaged and let too much current into the miner. Generally its not a good idea to keep miners running during a storm.

Yes I agree that is probably what happened to the one with the board that quit working.  Its in the server room at my office.  Living in FL, I can't unplug during every storm or it would never be plugged in LOL.

Since all the heat seems to be concentrated at the connection you should of had a bad connection on the pin or corrosion that caused them to over heat.  S3+ should not have problems like that even with 18 AWG.

I pay pretty close attention to detail and I didn't see anything out of the ordinary on the connector or the pins.  I also thought an s3+ shouldn't have problems like that on an 850 watt psu, granted there we're 2 s3s on this psu but still.

I see, this must be the miner we discussed. I would like to know, were the PSU plugged in a surge protection power bar? I have mine on and i assumed they are safe from surges.

It was in a cheap power bar but I find here in Fl where the Lightning is literally an every day occurrence, nothing can stop that kind of voltage.  These are in our server room at my office and the whole room is surge protected as well by a big surge protector that built in the wall by the power distribution panel.  As well as another whole building surge protector that is in a utility room.  We lose equipment every summer even with all that.  We have never had a surge get to the racks which are behind big and rAck mount ups though.

[olliec420]

What firmware do you install in the S3?.

I had the same problem, and one January firmware have a issue with voltage. My S3 was burn and loss it.

I recommend install the last firmware if you have not OC or November firmware and update the CGMINER of Kano.

Regards.
Antuam

Well I never checked firm ware version or for updates.  I guess I will take a look at that, thx.

[VirosaGITS]

Hmm. Weird, the rating on this bar is enough for intense storm and it guarantee anything its connected to if it get fried. Still good to know, thanks.

I guess this is pretty much settled for you anyways, since you sold it.

I still wonder how come only one side fried and not everything.