Caution! Pandaminers catching fire! - page 2.

VoskCoin

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Quote from: Oklawolf on June 05, 2017, 05:14:52 PM

Quote from: philipma1957 on June 02, 2017, 03:43:02 PM

no they are using 5 and splitting 2 into 4

so
1 single 18 gauge
1single 18 gauge
1 single 18 gauge

then a single 18 gauge that splits into 2 single 18gauge
then a single 18 gauge that splits into 2 single 18gauge

and every photo of every burnt setup shows the melt starts by the split cables.

I mention that this psu should not be used long term more then one time in my review and that I went to a rosewill tokamak 1500 watt with no issues

Yeah, that's completely irresponsible engineering right there. Too few conductors with too few connections to the hardware. And with wiring like that, I seriously question their "1600W" unit is capable of anywhere near that mark over the long haul. If it is, it's a fire hazard because the cabling simply can't support it.

Stuff like this sickens me. This crap is going to burn someone's house down.

FYI, those Tokamak units throw a ton of EMI back into the power lines. I just pulled one out of my farm because I couldn't review power supplies with it running at the same time. Too much extra noise in the oscilloscope. They kill AM radio for a block, too. I have another 1200W Enhance Titanium doing the same thing which will also come out of the farm soon. Other than that, they are good units. I'd have just kept using it if I wasn't a power supply reviewer, but I hate shutting the rigs down just for load testing so I'm migrating to units that don't do that.

do you have links to your reviews? That's very cool.

Oklawolf

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Quote from: philipma1957 on June 02, 2017, 03:43:02 PM

no they are using 5 and splitting 2 into 4

so
1 single 18 gauge
1single 18 gauge
1 single 18 gauge

then a single 18 gauge that splits into 2 single 18gauge
then a single 18 gauge that splits into 2 single 18gauge

and every photo of every burnt setup shows the melt starts by the split cables.

I mention that this psu should not be used long term more then one time in my review and that I went to a rosewill tokamak 1500 watt with no issues

Yeah, that's completely irresponsible engineering right there. Too few conductors with too few connections to the hardware. And with wiring like that, I seriously question their "1600W" unit is capable of anywhere near that mark over the long haul. If it is, it's a fire hazard because the cabling simply can't support it.

Stuff like this sickens me. This crap is going to burn someone's house down.

FYI, those Tokamak units throw a ton of EMI back into the power lines. I just pulled one out of my farm because I couldn't review power supplies with it running at the same time. Too much extra noise in the oscilloscope. They kill AM radio for a block, too. I have another 1200W Enhance Titanium doing the same thing which will also come out of the farm soon. Other than that, they are good units. I'd have just kept using it if I wasn't a power supply reviewer, but I hate shutting the rigs down just for load testing so I'm migrating to units that don't do that.

Liquid71

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Quote from: VoskCoin on June 05, 2017, 01:43:10 PM

Quote from: ?? on ??

This is why you have them hosted by Giga Watt, they are professionals and also do on site repairs. https://giga-watt.com/promo/prices

Do their ICO now and lock in 3.3c kwh for 50 years https://cryptonomos.com/?r=1H2MkmZnQak9mIc0NKCaddDsQ

I just glanced over it, if you buy into their ICO now, when would you be able to begin hosting? Do you have hosting with them currently?

Yes I have hosting, I'm not 100% sure as in asked them but reading the whitepaper it sounds pretty clear that you can apply your tokens towards your hosted miners to lower the current plan you are on. It says if you don't have enough tokens to cover the power of your hosted miner then the amount above the tokens is charged at the regular rate, which is 9.75c kwh for the 1-9 miner package. I didn't ask because if for some reason I can't apply the tokens to my current hosting plan I'll rent the tokens out which will make up the difference between what I'm payign now and the discounted rate the ICO locks in. I trust the company though and never had any issues. The tokens are released Aug 7 and I have some batch 2 which is Aug 15 and you can use the tokens as soon as they are released for mining and renting.
If you go on coindesk and search Dave Carlson you'll see articles about the CEO and the company going back many years, pretty good stuff worth reading if you are considering the ICO or even just curious about professional mining company.

VoskCoin

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Quote from: ?? on ??

This is why you have them hosted by Giga Watt, they are professionals and also do on site repairs. https://giga-watt.com/promo/prices

Do their ICO now and lock in 3.3c kwh for 50 years https://cryptonomos.com/?r=1H2MkmZnQak9mIc0NKCaddDsQ

I just glanced over it, if you buy into their ICO now, when would you be able to begin hosting? Do you have hosting with them currently?

Liquid71

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Quote from: moftkhor on June 02, 2017, 12:22:45 PM

F
Anyone having an idea what would cause this wires to melt. SHOOT!
I'm thinking maybe the PSU's included in the Pandaminers are worthless...

Low quality 18 or higher gauge wires will melt I've had it happen to me (not nearly that bad and not on a panda miner) but lower quality PSU will ship thin cables that melt. Try for 16 gauge cables whenever possible for mining. Panda must have went with the cheapest PSU they could find and it used low quality cables. I'm just shocked this hasn't happened to more people. I have one on order with Giga Watt, at least I won't have to deal with it but I probably wouldn't have ordered it if I knew they used such shitty PSU

Quote from: philipma1957 on June 02, 2017, 03:43:02 PM

no they are using 5 and splitting 2 into 4

so
1 single 18 gauge
1single 18 gauge
1 single 18 gauge

then a single 18 gauge that splits into 2 single 18gauge
then a single 18 gauge that splits into 2 single 18gauge

and every photo of every burnt setup shows the melt starts by the split cables.

I mention that this psu should not be used long term more then one time in my review and that I went to a rosewill tokamak 1500 watt with no issues

Phil knows his stuff, if I was hosting mine I'd swap out the PSU to the rosewill he recommends. Hopefully Panda comes through with repair and parts but I wouldn't continue to use that PSU

moftkhor

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Quote from: Eyedol-X on June 05, 2017, 10:41:42 AM

Quote from: moftkhor on June 05, 2017, 10:36:42 AM

I once got a new Pandaminer sent to me after receiving a whole damaged one, also as compensation for the lost mining time... Still I've lost a lot of money as ETH was skyrocketing meanwhile!
This was also the last time I was planning to work with Pandaminer again. I'm switching over to making my own rigs with Sapphires.

I'm going to try and see if Pandaminer would send me at least a couple mobo's to fix my miners. They can keep they're crappy PSU's. Just a motherboard will be a mission impossible to get! Hope they work along...

It seems like it would be in Pandaminers best interest to send you a replacement board since I'm sure this post can't be good press for them. It also seems like the best possible solution but opens them up to questions about who's responsible for a potential fire and whether or not they will sell motherboards directly.

I'll not be asking them to sell me the motherboards, but to send it to me as warranty replacement parts... We'll see what it will turn out...

Eyedol-X

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Quote from: moftkhor on June 05, 2017, 10:36:42 AM

I once got a new Pandaminer sent to me after receiving a whole damaged one, also as compensation for the lost mining time... Still I've lost a lot of money as ETH was skyrocketing meanwhile!
This was also the last time I was planning to work with Pandaminer again. I'm switching over to making my own rigs with Sapphires.

I'm going to try and see if Pandaminer would send me at least a couple mobo's to fix my miners. They can keep they're crappy PSU's. Just a motherboard will be a mission impossible to get! Hope they work along...

It seems like it would be in Pandaminers best interest to send you a replacement board since I'm sure this post can't be good press for them. It also seems like the best possible solution but opens them up to questions about who's responsible for a potential fire and whether or not they will sell motherboards directly.

moftkhor

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Quote from: philipma1957 on June 05, 2017, 10:10:38 AM

Quote from: moftkhor on June 05, 2017, 09:34:59 AM

Anyone got an idea where I could buy this Pandaminers motherboard now that I'm down 2 miners due to motherboard issues...?

email them.

btw this is why I stopped having anything to do with them.

my logic was everyone was telling them to go f their selves. I liked the design and convinced them to send a batch 1 to me to show. which I did

they sold out fast once people saw the gear.

My review clearly said the stock psu was not good..

They gave me a big 30 dollar discount on that machine after they sold 500 of them.

that was mildly annoying but they then sold out the second batch without selling me a single one.

Basically this was a good demo to me that they are not worthwhile and I had no interest in doing any business with them as I could so they are typical shit business people with zero concept of customer service.

The posts are here if you look and read. I am sorry the psu burned the boards, but you could try to ask for repair service from them hah good luck. or you could look at thread here and find the people that did do solder repairs to the jacks. I am sure the guy that solder his would fix yours.

to all get a good psu to run this and mine zec not eth. (you will not burn your gear up)

I once got a new Pandaminer sent to me after receiving a whole damaged one, also as compensation for the lost mining time... Still I've lost a lot of money as ETH was skyrocketing meanwhile!
This was also the last time I was planning to work with Pandaminer again. I'm switching over to making my own rigs with Sapphires.

I'm going to try and see if Pandaminer would send me at least a couple mobo's to fix my miners. They can keep they're crappy PSU's. Just a motherboard will be a mission impossible to get! Hope they work along...

philipma1957

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Quote from: moftkhor on June 05, 2017, 09:34:59 AM

Anyone got an idea where I could buy this Pandaminers motherboard now that I'm down 2 miners due to motherboard issues...?

email them.

btw this is why I stopped having anything to do with them.

my logic was everyone was telling them to go f their selves. I liked the design and convinced them to send a batch 1 to me to show. which I did

they sold out fast once people saw the gear.

My review clearly said the stock psu was not good..

They gave me a big 30 dollar discount on that machine after they sold 500 of them.

that was mildly annoying but they then sold out the second batch without selling me a single one.

Basically this was a good demo to me that they are not worthwhile and I had no interest in doing any business with them as I could see they are typical shit business people with zero concept of customer service.

The posts are here if you look and read. I am sorry the psu burned the boards, but you could try to ask for repair service from them hah good luck. or you could look at thread here and find the people that did do solder repairs to the jacks. I am sure the guy that solder his would fix yours.

to all get a good psu to run this and mine zec not eth. (you will not burn your gear up)

moftkhor

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Anyone got an idea where I could buy this Pandaminers motherboard now that I'm down 2 miners due to motherboard issues...?

jstefanop

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Quote from: adaseb on June 02, 2017, 02:35:46 PM

Its not the connectors. Where it melted was the GND not the +12V lines. They got some bad grounding problem or the PSU is just faulty in someway.

This is just bad engineering...

Yes the ground lines are the most likely ones to fail when you don't have enough connectors for the current draw your pulling. This is why the higher power draw 8 pin GPU connector has two extra ground lines.

philipma1957

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Quote from: kodokbuduk on June 02, 2017, 10:00:20 PM

is that PSU from panda?

Yes it is the stock oem Psu.

And it is not good. At the split cables.

It is simple the jacks pull about 175 watts

And this means those split cables are doing close to 300-350 watts.

They rate for 225 max.

So they melt at one of the split jacks and then the rest melt.

Translation. The oem Psu can not do the trick.

Now back to other issue 7 jacks for 8 Psu,s and the mobo .

It is fine if seven cables at 16 gauge go in.

And you do not run the gear really fast.

I used smOS and downclocked just a bit. I ran Zec as it used less power.

When I sold the panda I said to the buyer don't use the stock Psu and don't dual mine.

It is doing well for him not sure what he runs it with

kodokbuduk

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is that PSU from panda?

moftkhor

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Quote from: charles2k on June 02, 2017, 05:09:34 PM

Replace Molex 6pin connectors on mainboard with Molex Mini-Fit Jr. Seriess 5569 part. No 39-30-1060
Their Current - Maximum per Contact is 13A - so 3x13=39A
I used it for KNC Neptune (more than 400W per one 6pin PCIE)
But for higher A is better 16AWG cables.

http://www.farnell.com/datasheets/2286643.pdf?_ga=2.171704037.457168996.1496440853-17182377.1496440853

I was also thinking of changing all the connectors, but now I'm having doubts if this would solve the problem. I still think the melting starts at the split cables?

charles2k

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Replace Molex 6pin connectors on mainboard with Molex Mini-Fit Jr. Seriess 5569 part. No 39-30-1060
Their Current - Maximum per Contact is 13A - so 3x13=39A
I used it for KNC Neptune (more than 400W per one 6pin PCIE)
But for higher A is better 16AWG cables.

http://www.farnell.com/datasheets/2286643.pdf?_ga=2.171704037.457168996.1496440853-17182377.1496440853

moftkhor

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Quote from: philipma1957 on June 02, 2017, 03:43:02 PM

Quote from: jstefanop on June 02, 2017, 01:49:14 PM

Quote from: devkowow on June 02, 2017, 12:39:22 PM

Nothing to do with PSU it self nothing to do with how much current system draws. You can produce flame with AA battery as well.

Looks like just faulty soldering or faulty connectors. Loss of proper connection causes open circuit > resistance closing to infinity thus current without other path will try to flow trough and heat up at point where resistance is high causing connections to catch fire. Might as well be just your own fault if you did not connect wires properly but I would go with cheap connectors used that doesn't fit together too well.

They are using seven 6 pin connectors to power 8 GPUs + aux power. This is bound to end in this type of failure eventually. Technically there should be 16 6 pin connectors to play it safe. They used the bare minimum. (don't forget a normal 400/500 GPU is pulling half its power from the PCIE slot/riser and another half from the 6 pin).

no they are using 5 and splitting 2 into 4

so
1 single 18 gauge
1single 18 gauge
1 single 18 gauge

then a single 18 gauge that splits into 2 single 18gauge
then a single 18 gauge that splits into 2 single 18gauge

and every photo of every burnt setup shows the melt starts by the split cables.

I mention that this psu should not be used long term more than one time in my review and that I went to a rosewill tokamak 1500 watt with no issues

Just before I've read your reply, I've noticed on my other Pandaminers the splitted cables were significantly hotter than the single cables running to the connectors.
I do believe this is the problem. I think I'll be better off replacing all PSU's by 7 single cable PSU's?

adaseb

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Quote from: philipma1957 on June 02, 2017, 04:38:33 PM

Quote from: adaseb on June 02, 2017, 04:32:30 PM

I had this happen also with a regular Platinum PSU which had split cables, and it was connected to a small GPU and started to turn brown.

They are never a good idea for high wattage applications because they might not be crimped properly.

yep I posted an explanation in a screen shot edit.

the melting start in the split cable du to overheating just too much power on 18 gauge cables.

once one plug fails the other 6 suck harder and they fail one by one.

Yes but why melt at the GND wires and not +12V. I think they didn't properly ground the GPUs from the PEG slot connector.

With an 8 pin PCIe GPU, it has 5 GND's from the PCIe power connector and has like around 8-9 different grounding pins with the PEG slot.

So looks like there were more +12V wires than GND wires.

philipma1957

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Quote from: adaseb on June 02, 2017, 04:32:30 PM

I had this happen also with a regular Platinum PSU which had split cables, and it was connected to a small GPU and started to turn brown.

They are never a good idea for high wattage applications because they might not be crimped properly.

yep I posted an explanation in a screen shot edit.

the melting start in the split cable du to overheating just too much power on 18 gauge cables.

once one plug fails the other 6 suck harder and they fail one by one.

adaseb

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I had this happen also with a regular Platinum PSU which had split cables, and it was connected to a small GPU and started to turn brown.

They are never a good idea for high wattage applications because they might not be crimped properly.

philipma1957

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Quote from: PanneKopp on June 02, 2017, 03:54:49 PM

Hi @philipma1957 ,

Quote from: philipma1957 on June 02, 2017, 03:43:02 PM

Quote from: jstefanop on June 02, 2017, 01:49:14 PM

Quote from: devkowow on June 02, 2017, 12:39:22 PM

Nothing to do with PSU it self nothing to do with how much current system draws. You can produce flame with AA battery as well.

Looks like just faulty soldering or faulty connectors. Loss of proper connection causes open circuit > resistance closing to infinity thus current without other path will try to flow trough and heat up at point where resistance is high causing connections to catch fire. Might as well be just your own fault if you did not connect wires properly but I would go with cheap connectors used that doesn't fit together too well.

They are using seven 6 pin connectors to power 8 GPUs + aux power. This is bound to end in this type of failure eventually. Technically there should be 16 6 pin connectors to play it safe. They used the bare minimum. (don't forget a normal 400/500 GPU is pulling half its power from the PCIE slot/riser and another half from the 6 pin).

no they are using 5 and splitting 2 into 4

so
1 single 18 gauge
1single 18 gauge
1 single 18 gauge

then a single 18 gauge that splits into 2 single 18gauge
then a single 18 gauge that splits into 2 single 18gauge

and every photo of every burnt setup shows the melt starts by the split cables.

I mention that this psu should not be used long term more then one time in my review and that I went to a rosewill tokamak 1500 watt with no issues

so what is your guess ?

Did the PSU (with new cabels) or the "Panda" (with new connectors) survive ?
... I´m still missing a statement from the manufactorer ^^ .

Cheesy

P.S. I do not see anything implying "where it starts" ...

then you don't see the same photos I see give me a minute .

look at the melt pattern on this one

and my guess of what it means

Topic: Caution! Pandaminers catching fire! - page 2. (Read 4673 times)