PSU tripping RCD

[porina]

I'm going to guess it is dead, and hopefully didn't take anything else with it. Anyway, I woke to find my house silent and internet was down. RCD tripped. Ok, what caused it? I tried disconnecting things and eventually traced it down to my gaming PC. If the PSU is plugged in and power switched on (even if PC is off), the RCD trips. I disconnected all the modular cables from the PSU, so there is nothing connected to it. Apply mains power, trips. So it is the PSU.

 

Can't see anything wrong. No funny smells. No rattles. I submitted a query with the place I bought it from. Their site lists 10 year warranty, but only 1 year RTB. So I might have to go to manufacturer. Anything else I can check while I wait for the seller to respond?

 

As a temporary measure to get that system going again I think I can steal a PSU from another less important system.

[Somerandomtechyboi]

rma the psu and just substitute it with some other existing psu while you wait for rma

 

given the 10 year warranty id have to assume a quality unit so yeah its probably just a lemon that died prematurely, parts should be fine given all those fancy protections

[Alex Atkin UK]

2 hours ago, porina said:

 I disconnected all the modular cables from the PSU, so there is nothing connected to it. Apply mains power, trips. So it is the PSU.

Its probably something really simple like the class Y capacitors on the mains input have failed so are causing a dead short.

 

The good news is that means its highly unlikely to have done any damage to the PC.

[porina]

1 hour ago, Somerandomtechyboi said:

rma the psu and just substitute it with some other existing psu while you wait for rma

That's the plan. Seller has given me RMA so it appears I don't need to go through manufacturer. I still need to extract it at some point.

 

1 hour ago, Somerandomtechyboi said:

given the 10 year warranty id have to assume a quality unit

MSI MPG A850G as recommended by some (maybe more than one) person on this forum. Can't find any warranty info on it on MSI's own site. 10 years is listed on sellers.

[porina]

System is online again. The PSU I stole from the other system turned out to be HX1000i. I think I didn't use that for this build originally as I've had it quite a long time. 2017 now I look it up! Dunno if I can be bothered to another PSU swap on the system again now that I'm reminded how much I hate cable management!

[IkeaGnome]

1 hour ago, porina said:

System is online again. The PSU I stole from the other system turned out to be HX1000i. I think I didn't use that for this build originally as I've had it quite a long time. 2017 now I look it up! Dunno if I can be bothered to another PSU swap on the system again now that I'm reminded how much I hate cable management!

Double check your cables, but the early models of the MSI power supplies were virtually identical to Corsair type 4. IIRC it was only the 24 pin cable that was different. Worth looking at in your case. If you've got a multimeter it's really quick to check and might save you from having to rerun all your cables again. 

[porina]

7 minutes ago, IkeaGnome said:

Double check your cables, but the early models of the MSI power supplies were virtually identical to Corsair type 4. IIRC it was only the 24 pin cable that was different. Worth looking at in your case. If you've got a multimeter it's really quick to check and might save you from having to rerun all your cables again. 

My HX1000i is Type 3. Dunno what the difference is between type 3 and type 4. I'll just play it safe, cables will be the ones that came with the PSU.

[IkeaGnome]

4 minutes ago, porina said:

My HX1000i is Type 3. Dunno what the difference is between type 3 and type 4. I'll just play it safe, cables will be the ones that came with the PSU.

24 pin.

What's the difference between CORSAIR Type-3, Type-4 and Type-5 cables? | CORSAIR

PSU CABLE COMPATIBILITY

[porina]

RMA complete! This will go into the system I pulled the Corsair out of. I'm not touching the other system for now.

[OddOod]

On 5/12/2025 at 8:28 AM, porina said:

Can't find any warranty info on it on MSI's own site. 10 years is listed on sellers.

https://us.msi.com/page/warranty#:~:text=3. Product-,80 PLUS GOLD,-- Warranty period of

[OddOod]

On 5/12/2025 at 11:20 AM, porina said:

System is online again. The PSU I stole from the other system turned out to be HX1000i. I think I didn't use that for this build originally as I've had it quite a long time. 2017 now I look it up! Dunno if I can be bothered to another PSU swap on the system again now that I'm reminded how much I hate cable management!

I have found one upside of centralizing on Seasonic for PSUs is that when I need to do a swap, it's unplug replug, no recabling needed. Though I do always double check their compatibility guide before doing so

[porina]

3 minutes ago, OddOod said:

https://us.msi.com/page/warranty#:~:text=3. Product-,80 PLUS GOLD,-- Warranty period of

US page is irrelevant to me. They vary it worldwide and my local page only says check with seller.

[porina]

2 minutes ago, OddOod said:

I have found one upside of centralizing on Seasonic for PSUs is that when I need to do a swap, it's unplug replug, no recabling needed. Though I do always double check their compatibility guide before doing so

I rarely ever rebuild/swap in that way so it was never a consideration.

 

I'll probably go back to Corsair for my next serious build. They've always been solid for me even if they cost a bit more.

[OddOod]

6 minutes ago, porina said:

US page is irrelevant to me. They vary it worldwide and my local page only says check with seller.

Fair, my americentric apologies.

4 minutes ago, porina said:

I'll probably go back to Corsair for my next serious build. They've always been solid for me even if they cost a bit more.

Strong move. My PSU tier list is basically SS, Corsair, MSI