Mobo, PSU burned out | Bitcointalksearch.org

ranlo

legendary

Activity: 1988

Merit: 1007

Quote from: l3jmr on June 12, 2013, 05:20:13 PM

Will try to get some cheap risers then i guess. One last question should i get 5 then for every GPU to have this additional power or just the ones i really need (pci-e 1x slots).

Most say you can get away with using them on like half, but I would say to go with them for all. Especially when dealing with hardware, I've learned that it's better to spend a little more now than risk losing a lot more in the future.

l3jmr

member

Activity: 99

Merit: 10

Will try to get some cheap risers then i guess. One last question should i get 5 then for every GPU to have this additional power or just the ones i really need (pci-e 1x slots).

ranlo

legendary

Activity: 1988

Merit: 1007

Quote from: l3jmr on June 12, 2013, 12:01:56 PM

Quote from: sebo on June 12, 2013, 10:33:46 AM

Hi
you have to solder wires from 12v line from PSU to the pins in the normal riser (12v pins)

That's above my experties, i neither have the tools or the knowledge to do that

Quote from: ranlo on June 12, 2013, 10:56:48 AM

Quote from: l3jmr on June 12, 2013, 10:01:47 AM

I only used power risers for 2 cards tho, since the board already got 3 slots that will fit the GPU. So can this still be the case ?

How can i make my own powered risers? I saw some on ebay but they cost 5 times as much as the normal ones.

Good question, and not something I know enough about. However...

Your PSU was 1050w. You were pulling nearly 1000w from the wall.

My understanding is that PSU's "deteriorate" over time (based on power calculators), something about capacitor age or something. Someone who knows more may be able to chime in but I think this could be related? Ex. the power being pushed by the PSU decreased over time until it could no longer handle the load and then was overloaded.

I have heared about the deteriorating PSU's over time aswell, however my PSU was only 2 months old - same with the motherboard so i'm not sure if that applys to my case aswell. I have had experience with broken down PSU's in the past but never like this. It usually is generating extreme heat and you can smell the plastic burning and then it explodes and doesnt work anymore. Mine still works however so i dont know

I'm going to go with what the others said then and say that it's power coming from the mobo that was the issue (need powered risers). My last PSU actually exploded (smelled burning, then 3 loud bangs and it quit working) but didn't fry anything, HOWEVER I was told that it was pretty lucky as it could have fried everything.

If the PSU is still running, though, the others are likely right.

lbr

sr. member

Activity: 423

Merit: 254

yeah.. the easiest way to measure temperature is using your finger ; )))
unless you short something and you won't have some static on you and temperature is below 50c it will be okay

lbr

sr. member

Activity: 423

Merit: 254

imagine 5 alcoholics(GPU) drinking beer from a small beer keg(motherboard voltage regulator) connected with tiny in diameter straw(the stuff which burnt) to the huge beer canister(PSU)

so.. since alcoholics drink too fast, the tiny straw will burst cause of pressure; )))

now.. would not it be better to give each alcoholic a straw and plug each straw directly into huge canister(GPU+risers)? Cheesy

l3jmr

member

Activity: 99

Merit: 10

Quote from: lbr on June 12, 2013, 02:24:04 PM

Quote from: l3jmr on June 12, 2013, 02:15:46 PM

Would it be ok if i replace 2*7870 with 2x7850? That would reduce power consupmtion for about 80W or so if my calculations are correct.

Thanks for help , i really appreciate it Grin

mm.
See, GPUs are using not only the power supplied by PCI-E power cables(http://www.hardcore-[Suspicious link removed]/images/psu/pcie6.jpeg) but also the power from PCI-e slot itself - http://en.wikipedia.org/wiki/PCI_Express#Pinout, see there are +12V power lines?

So what happened to your rig -
motherboard takes +12V from PSU using the ATX power plug(the one which burned)
motherboard then does something with that power(or not) using voltage regulator on the motherboard and gives it to GPUs on the PCI-e slot.
And your GPUs took too much power from PCI-e slots - so the weakest link burnt, usually the weakest link is the ATX power connector itself.

Now to anwser your question(replace 7870 with 7850) we need to know exactly how much power 7850/7870 are using from PCIe slot itself and for how much max power your ATX connector is rated and assuming that not only the connector burnt but also motherboard voltage regulator also - how much max power it can give.

That's a lot of questions ; )) That's why ppl usually use powered risers - consuming +12V directly from PSU and not using it from motherboard.

God damn that sounds complicated.

By finger test you mean touch the power connector and feel it if it's running too hot ? Sounds dangerous Cheesy

lbr

sr. member

Activity: 423

Merit: 254

though, you can try to perform a finger test : D
plug 1 7870, let it run for a while and measure temperature on the ATX power connector and motherboard power elements. If it is ok - add one more 7870 and so on..

lbr

sr. member

Activity: 423

Merit: 254

Quote from: l3jmr on June 12, 2013, 02:15:46 PM

Would it be ok if i replace 2*7870 with 2x7850? That would reduce power consupmtion for about 80W or so if my calculations are correct.

Thanks for help , i really appreciate it Grin

mm.
See, GPUs are using not only the power supplied by PCI-E power cables(http://www.hardcore-games.tk/images/psu/pcie6.jpeg) but also the power from PCI-e slot itself - http://en.wikipedia.org/wiki/PCI_Express#Pinout, see there are +12V power lines?

So what happened to your rig -
motherboard takes +12V from PSU using the ATX power plug(the one which burned)
motherboard then does something with that power(or not) using voltage regulator on the motherboard and gives it to GPUs on the PCI-e slot.
And your GPUs took too much power from PCI-e slots - so the weakest link burnt, usually the weakest link is the ATX power connector itself.

Now to anwser your question(replace 7870 with 7850) we need to know exactly how much power 7850/7870 are using from PCIe slot itself and for how much max power your ATX connector is rated and assuming that not only the connector burnt but also motherboard voltage regulator also - how much max power it can give.

That's a lot of questions ; )) That's why ppl usually use powered risers - consuming +12V directly from PSU and not using it from motherboard.

l3jmr

member

Activity: 99

Merit: 10

Would it be ok if i replace 2*7870 with 2x7850? That would reduce power consupmtion for about 80W or so if my calculations are correct.

Thanks for help , i really appreciate it Grin

lbr

sr. member

Activity: 423

Merit: 254

Quote from: l3jmr on June 12, 2013, 01:54:17 PM

should i do anything about that burned cable or is it a fire hazard now?

totally, make sure there are no shorts and don't turn the rig on with the same config(5x7870).

kodo

newbie

Activity: 42

Merit: 0

Something similiar to this happend to my miner except I was able to smell the burning and stopped the power.

lbr

sr. member

Activity: 423

Merit: 254

He meant this - http://www.google.com/search?q=M2A581&rls=com.microsoft:en-za:IE-SearchBox&oe=&um=1&ie=UTF-8&hl=en&tbm=isch&source=og&sa=N&tab=wi&ei=TsS4UZfLD4jK4ASOrIG4Bg&biw=1440&bih=704&sei=UMS4UaF2yffhBJ7DgeAL

see, there is a molex power above the first PCI-e slot.

Clean - take all the melted plastic away and make sure there is a contact between those pins that have burned.

It burned because there were too much Amps going, powered risers would have prevented this.
It was not PSU problem.

l3jmr

member

Activity: 99

Merit: 10

Quote from: lbr on June 12, 2013, 01:47:44 PM

clean it and plug again, it's probably alive ; )

clean what the PSU? should i do anything about that burned cable or is it a fire hazard now?

l3jmr

member

Activity: 99

Merit: 10

Im not sure, it's this one http://www.asrock.com/mb/AMD/970%20Extreme4/ it does have 8pin voltage connector or whatever that is near the CPU if that's what you ment?

lbr

sr. member

Activity: 423

Merit: 254

clean it and plug again, it's probably alive ; )

puppetmaster

newbie

Activity: 7

Merit: 0

Does your motherboard have an extra 4 Pin Molex or 6 Pin PCI E connector? Generally if you are running alot of cards at once, you want one with one of the connectors to supply more power, so you dont burn out your 24pin.

litecoin_messiah

sr. member

Activity: 356

Merit: 268

Yeah you have to use Powered Risers!

l3jmr

member

Activity: 99

Merit: 10

Quote from: sebo on June 12, 2013, 10:33:46 AM

Hi
you have to solder wires from 12v line from PSU to the pins in the normal riser (12v pins)

That's above my experties, i neither have the tools or the knowledge to do that

Quote from: ranlo on June 12, 2013, 10:56:48 AM

Quote from: l3jmr on June 12, 2013, 10:01:47 AM

I only used power risers for 2 cards tho, since the board already got 3 slots that will fit the GPU. So can this still be the case ?

How can i make my own powered risers? I saw some on ebay but they cost 5 times as much as the normal ones.

Good question, and not something I know enough about. However...

Your PSU was 1050w. You were pulling nearly 1000w from the wall.

My understanding is that PSU's "deteriorate" over time (based on power calculators), something about capacitor age or something. Someone who knows more may be able to chime in but I think this could be related? Ex. the power being pushed by the PSU decreased over time until it could no longer handle the load and then was overloaded.

I have heared about the deteriorating PSU's over time aswell, however my PSU was only 2 months old - same with the motherboard so i'm not sure if that applys to my case aswell. I have had experience with broken down PSU's in the past but never like this. It usually is generating extreme heat and you can smell the plastic burning and then it explodes and doesnt work anymore. Mine still works however so i dont know

kodo

newbie

Activity: 42

Merit: 0

gotta get a new one

Kaepora

newbie

Activity: 42

Merit: 0

Quote from: l3jmr on June 12, 2013, 03:36:44 AM

Hi,
i've been arount these forums lurking for a while just never registered/posted anything. This is what happened to me and was wondering if anyone had a similar experience or know which would cause this - bad mobo or bad PSU. Motherboard is Asrock 970 Extreme 4 and the psu is Corsair HX 1050W. It was running 5*7870 and power consumption measured at the socket was 960-980W and 4-5A current. It was running fine for about 2 months untill yesterday

I only noticed because my miners went offline, but the fans on GPU's kept running and the PSU still turns on.

http://shrani.si/f/2H/mu/3groVBHV/1/wp20130611009.jpg

http://shrani.si/f/m/Ct/3Ds0Byvb/1/wp20130611005.jpg

5 * 7870 was bad idea, are they overclocked or overvolted?

Topic: Mobo, PSU burned out (Read 1652 times)