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Question What is the culprit behind the Corsair RMx 850 ?

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My computer system has been performing admirably with a Seasonic 520W PSU. My GPU was upgraded to RX 6700 XT and subsequently to RTX 3070 from RTX 2060. Everything was OK until I updated the power supply to a Corsair RMx 850.

It constantly crashing and undervolting in games, not supplying enough power to the GPU. I took it to a store, and the technician there used an equipment to check the power and establish that the PSU is malfunctioning and undervolting. So I received a replacement, and after a week, the same thing occurred. Almost to the letter. Is this yet another faulty power supply? What exactly is going on? Why is this particular PSU malfunctioning? Is it related to my power outlet?

I'm looking to RMA the graphics card, making sure it's not the graphics card, but I'm suspecting it's the PSU. Same stuff happening despite replacement.

This is the error in Event Log everytime my game crashes:

"The description for Event ID 0 from source nvlddmkm cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event:

\Device\000000ae
Error occurred on GPUID: 2900

The message resource is present but the message was not found in the message table"
Which RM850x? There have been a few models.

Though I have heard nothing bad about any of them. Mine runs a 3080Ti without any issues.

Might be time to take a close look at the PCIe slot, since you seem to have changed out a lot of parts.

May also need to take a look at the outlet you are powering the system from. You could be getting dirty power which can cause many issues. Try a different circuit for a while and see if it improves things. Make sure there aren't any large appliances on the same circuit that could be triggering the PSU to go into a protected mode. A high enough spike or sag could do it if the new PSU is more sensitive then your old one. Seasonic 520W ones were group regulated I think, so that would behave differently towards abnormal conditions.

If you haven't in a while, might be time to wipe the OS.
Eximo said:
Which RM850x? There have been a few models.

Though I have heard nothing bad about any of them. Mine runs a 3080Ti without any issues.

Might be time to take a close look at the PCIe slot, since you seem to have changed out a lot of parts.

May also need to take a look at the outlet you are powering the system from. You could be getting dirty power which can cause many issues. Try a different circuit for a while and see if it improves things. Make sure there aren't any large appliances on the same circuit that could be triggering the PSU to go into a protected mode. A high enough spike or sag could do it if the new PSU is more sensitive then your old one. Seasonic 520W ones were group regulated I think, so that would behave differently towards abnormal conditions.

If you haven't in a while, might be time to wipe the OS.
Click to expand...
I wiped my OS, doesn't work.
I'm really sure it's this particular PSU, it has a reputation of being unable to handle spikes and highly sensitive to spikes which triggers protection mode or something.

RM850X shuts down from 3090 FE power spikes

So I have a 3090 FE powered with 2 separate "pig tail" PCI-E cables from a RM850X (rest of build specs in profile). I occasionally do some machine learning that creates power spikes. Specifically, the GPU can load back-and-forth from ~20W to ~340W. Unfortunately, these spikes lead to an immediate...
forum.corsair.com forum.corsair.com
steamcommunity.com

Which PSU Should i get to replace my Corsair RM850x? :: Hardware and Operating Systems

steamcommunity.com steamcommunity.com
Which is sad because this PSU is supposed to be A-tier. This would explain why the Seasonic 520W one did not have such issues. The crash would only occur when playing demanding games.
Last edited by a moderator:
A lot of PSUs were proven unsuitable for the 30 series, including many Seasonic models, even very high end ones. All came down to how the OCP was configured.

There are a few factors there. How much load does the rest of the system consume are they overclocking the GPUs, are they using stock or custom power cables, the list goes on. And the most important one, which RM850x, there are several revisions and you can go back quite a number of years. A 7 or 8 year old power supply may not perform quite as well as a 1-2 year old one.

You can also find many posts recommending the RM850x for 350W cards, which your 3070 isn't even close to.

If you are concerned, get an ATX 3.0 PSU. Power spikes are part of the design specification.
Eximo said:
A lot of PSUs were proven unsuitable for the 30 series, including many Seasonic models, even very high end ones. All came down to how the OCP was configured.

There are a few factors there. How much load does the rest of the system consume are they overclocking the GPUs, are they using stock or custom power cables, the list goes on. And the most important one, which RM850x, there are several revisions and you can go back quite a number of years. A 7 or 8 year old power supply may not perform quite as well as a 1-2 year old one.

You can also find many posts recommending the RM850x for 350W cards, which your 3070 isn't even close to.

If you are concerned, get an ATX 3.0 PSU. Power spikes are part of the design specification.
Click to expand...
Ok.
Also, here's some things I just tried recently and it still crashes. I hope we can narrow down the culprit.
I got a replacement for the RM850x PSU, and it still crashes. So it wasn't because the PSU was defective.
I put in my old GPU RX 6700 XT, and it still crashing. So it's not the GPU?
I don't get it at this point. It has something to do specifically with this RM850x model that just doesn't work with my system.

This is the full name of it btw:

CORSAIR RMX Series RM850x 80 Plus Gold Fully Modular ATX Power Supply​

EVENT VIEWER:
UDvYdEL.png

3H5X4qV.png
I ordered a

MSI MAG B550 Tomahawk MAX WiFi motherboard on Amazon, Prime Day Deal for $144 USD before tax.​

I hope this works.
I would have tried a BIOS update first if you haven't. Then possibly vBIOS updates on the cards.

Also always drivers. Chipset/audio/etc can all be the source of problems. Yes, the video drivers are what are reporting the crash. The question is why.

Though you could be on the right track if the PCIe slot has a problem. But there is also always the CPU where the GPU PCIe lanes connect.
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