Possible PSU blown

I could potentially put it in my wife's motherboard but she only has a 550w power supply which wouldn't be sufficient and I would prefer not to use my old power supply to test out on my CPU and GPU. Would it be safe to test on this, I don't think 500w would be enough to provide power to GPU
 
And she has a micro atx case so it wouldn't fit in the case unless I completely dismantled it.

Do you think it's likely it would have taken out other components? That would be around £900 of damage:(
 
Managed to test with my wife's M2 drive and it booted fine, checked both M2 drives on second slot and files remain on them both,so I'm guessing the PSU caused file corruption.

GPU seems fine as does the CPU, ran a game for a short time and all seems good. Going to check temps later to make sure it's all good.

Still the occasional smell though, don't know if that's the remnants coming from the 24pin connection.
 
Last edited:
drumlegend said:
Is it possible that the motherboard caused this issue?
Click to expand...
Anything is possible, but the RMx PSU does have protections to protect the PSU from shorts.

Can you trace the pinout to find out which rail it is? If you google "Corsair 24 pin Type 4 Pin out" you should get some images come up. Note that the RMx SHIFT is Type-5.

drumlegend said:
I recently upgraded my PSU to RM750x in December. All been running fine and then this evening we were watching a programme on it and then the TV went blank and said no signal.
Click to expand...
You used the cables that came with the PSU right? I.e. you didn't plug existing modular cables into your new RMx. I assume you did, because it has been running fine since December, but just thought it worth checking.
 
I'm not
Tetras said:
Anything is possible, but the RMx PSU does have protections to protect the PSU from shorts.

Can you trace the pinout to find out which rail it is? If you google "Corsair 24 pin Type 4 Pin out" you should get some images come up. Note that the RMx SHIFT is Type-5.


You used the cables that came with the PSU right? I.e. you didn't plug existing modular cables into your new RMx. I assume you did, because it has been running fine since December, but just thought it worth checking.
Click to expand...
I'm not entirely sure what I'm looking at, the connections on both the 24 pin cable and the connector on the motherboard looked fine. But the wires on the cable were clearly melted so might have just been the cable. Either way, I've sent it back now.

I only used the cables that were supplied with the PSU. I know that using other cables can make all kinds of mess. I have heard horror stories about that.

It's been absolutely fine until last week, no indicators of any issues.

Just randomly turned itself off whilst watching a film but power button on the case remained lit. Then I pressed it and there was a quick *pop* and small puff of smoke.

Everything seems to be running fine otherwise. Ran some games and running smooth but both M.2's are corrupt so I will need to reinstall windows.
 
drumlegend said:
I'm not entirely sure what I'm looking at, the connections on both the 24 pin cable and the connector on the motherboard looked fine. But the wires on the cable were clearly melted so might have just been the cable. Either way, I've sent it back now.
Click to expand...
I was just curious which rail it was, since the pinout tells you if it was e.g. 12v, 5v, 5v standby. Would that help give you clues as to the problem? Maybe..., maybe not :)
 
Tetras said:
I was just curious which rail it was, since the pinout tells you if it was e.g. 12v, 5v, 5v standby. Would that help give you clues as to the problem? Maybe..., maybe not :)
Click to expand...
I think I'm always going to be curious about what it could be. I'm just hoping I don't get a new PSU and the same thing happens again because the board is bad. However, I know it's more probable that the PSU is the issue.
 
The melted cable suggests a short somewhere. Since you managed to boot it up with another PSU after, it seems unlikely to have been caused by a fault in the motherboard, so perhaps it was a short in the cable. Cutting open that cable and/or using a multimeter to measure the resistance between its pins might help diagnosing that. Corsair would probably be interested in taking a look at the cable themselves.
 
Mr Evil said:
The melted cable suggests a short somewhere. Since you managed to boot it up with another PSU after, it seems unlikely to have been caused by a fault in the motherboard, so perhaps it was a short in the cable. Cutting open that cable and/or using a multimeter to measure the resistance between its pins might help diagnosing that. Corsair would probably be interested in taking a look at the cable themselves.
Click to expand...
I hope so. It was still under warranty with the website I purchased it from, I sent it back to them for a direct replacement as I they have a quick turn around with returns and I don't want to use my old PSU on my new GPU. So, I haven't tested the PSU for too long.

It just seems a bit odd that there was a spark on the motherboard connector and smoke and it left no visible damage at all. I was very lucky.
 
Sounds like a smoothing cap under the heatshrink blew.

That ties with everything still working afterwards.

Probably still usable, just crummy voltage ripple afterwards.
Not sure I'd trust the PSU after that though- if one cap blows, more aren't going to be far behind...
 
You must log in or register to reply here.
Back
Top Bottom