Ram started smoking, mobo or ram at fault?

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alanroth17

Jun 13, 2018
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Hello, I recently upgraded my computer and upon first boot SMOKE started pouring out of one of the ram slots, with a quick WTF I pulled the plug. I have a TX650M PSU, i5-8400, As rock z370 pro 4, 2x4gb hyperx fury ddr4 ramsticks and a gtx 970 from my old build, the rest are brand new. Now, I tried to diagnose this, I ran the computer with no ram or GPU and it ran, no display (as expected right?). I then got the burned stick and put it into a1, it boot looped (dead stick I figured), I put the good stick into a1 and it reached bios setup (I think). That's how far I got, now is there anyway to know if it was the motherboard's fault or the Ram? Should I keep running it with 1 ram until I can replace these? Anything else I can do to diagnose this?
 
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jay32267

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Mar 16, 2017
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Assuming the RAM was connected correctly....I think the problem is more likely the RAM than the MB mainly because I think it's way more likely that the resistance dropped on the stick than the voltage went up on the MB.

Although, either way would increase the power and produce smoke.

When you put the burnt stick in the second time...it may not have smoked because it burnt itself to an open circuit condition.

Of course this is speculation.
 
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alanroth17

Jun 13, 2018
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The b1 slot started smoking, should I try the working stick into the b1 slot? The other stick is dead yes. Anything I can do to further diagnose this (While limiting damage)
 
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alanroth17

Jun 13, 2018
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There is a small burn mark on the stick, I attached a image of the slot, let me know if you see it. I'm going to check the back of the mono now. If you can't see the image here is the dropbox link: https://www.dropbox.com/s/krc8kulq5k8owwn/Photo%2013-06-2018%2C%208%2023%2037%20pm.jpg?dl=0
Photo%2013-06-2018%2C%208%2023%2037%20pm.jpg
 
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alanroth17

Jun 13, 2018
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Hey, thanks for the reply. I just checked the back and it looks pristine, no signs of damage on the back. Is it safe to assume that the smoke was from the ram? As there would surely be some damage on the back if it got that hot. However, near the b1 slot it looks like brown gunk on a small resistor and around a couple pins, I dont know if it is gunk or the resistor burned. There is a image attatched and a link if it didn't work too of the b1 slot.It seems like I could wipe it clean if I could reach it
 
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alanroth17

Jun 13, 2018
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I went ahead and just RMA'd both the ram and mobo, lucky I got the parts on amazon as they already sent replacements arriving tommorow and accepted the return without any questions. I'm assuming the PSU and CPU are fine, thanks for the help man.
 
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