New build CPU not found or fail light on MB. Please help

636ride158702e1

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Motherboard: MSI MEG X570 ACE Motherboard
Processor: AMD Ryzen 9 5950X
RAM: G.Skill Trident Z Royal F4-4000C18Q-128GTRG 128GB 4x32GB DDR4 4000MHz Memory
Video Card: MSI RTX 3080 Ti Gaming Trio 12GB
Power Supply: Seasonic PRIME PX-1000


So I just finished my first water cooled build. It has taken me about 3 weeks and more money that I want to admit but its done. filled it up with liquid and powered it on to get nothing. The motherboard has some EZ debug LEDs which says the CPU isn't being detected or failed. Basically the worst possible error, especially on a water cooled machine since it is no easy task to get to the processor. The odd thing to me is that the light doesn't stay on, it goes off intermittently but then comes right back on. There are several codes that are being displayed but none of them come out and say anything meaningful, more of less just post checks that aren't getting done. \

So far I have taken all the RAM out and powered it up and when I did that only the RAM light stayed on, the CPU light never lit. I then put one stick of RAM into my 2nd slot and it came up like usual and the CPU light kept coming on and then off again. I have some cable extenders for the CPU power but I took them off just to eliminate any cable issues. Same problem. I double checked that the CPU cables are plugged into the right spot on the PSU and that I'm using the right power cable, which I am and with this PSU its all dummy proof and the cables literally say CPU on the end of them. The motherboard has two 4+4 connectors for the CPU and I have them both connected. I read somewhere that some MBs wont put power to the CPU if you don't have something connected to the fan slot, but as I am water cooled that isn't necessary and I plugged a fan into the slot just to see but it didn't help. The MB manual says nothing about this either.

The only thing that has worried me with the CPU since day 1 was with the CPU water block. It came with the standard springs and screws but when I put the springs on and screwed it all down it wasn't fully seated against the CPU. I only know because I had to take it off for a reason I don't remember and I noticed the heat sink was barely even touched. I'm used to the fan firmly planting itself onto the CPU and spreading out the paste across the processor, but this looked to barely be even touching. I had no other springs and they were clearly fully compressed so I took the springs off and screwed it down tight. I'm hoping I didn't screw it down too tight, if that is a thing. Ive never had an issue with the springs not allowing for the fan or in this case the block to fully seat. This is about my 4th build but my first water cooled build. I usually build a new PC about every 5 years or so. I'm going to be draining the fluid and pulling the CPU unless someone has any other ideas to try. Really bummed right now. Pic below

<a href="https://ibb.co/vh3Rqzk">IMG-4832-1
lake country power
 

Alan J T

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Perhaps you need to update the BIOS via the BIOS flashback option on the board

Oh and as you may have already worked out test ya PC before doing all the Watercooling. so easy to check with it out of the case with cheap cooler stick of ram GPU and PSU just t o see if it will post before doing all that work.

Looks nice please don't make it look bad with RGB overkill,
 

636ride158702e1

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Perhaps you need to update the BIOS via the BIOS flashback option on the board

Oh and as you may have already worked out test ya PC before doing all the Water cooling. so easy to check with it out of the case with cheap cooler stick of ram GPU and PSU just t o see if it will post before doing all that work.

Looks nice please don't make it look bad with RGB overkill,
Thanks. I did update the bios last night with the flash and it didn't do anything to help. I never really considered testing it prior to. I admit that one seems a bit confusing to me. I will look up the process because now I am curious. Its never been an issue before because aside from the water cooling I could have slapped it together in a day. But this one in particular I went all out and it has 24 fans. All of my fans are RGB but I will probably just go with a solid color and not have rainbow colors going everywhere. I just need to get this thing to post. I already ordered another processor in anticipation of something being wrong with this one. At the very least I guess I can swap out the processor to see if it is in fact the processor and I still have a return window on the new processor. The original processor only had a 30 day window and I've spent longer than that ordering parts and building it. One of the issues was I was trying to get the MSI Godlike MB but it seems to be non existent now and I got tired of waiting on backorders so I went with the ACE.

So I guess I would just use a stock fan on the CPU to test it prior to and then reconnect all of my water cooling? Now that I think about it I guess it makes sense. The whole water cooling thing has turned my head into mush.
 

Furna

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Really a fantastic build ... 2 radiators, double fans everywhere, rigid tubing, colored coolant ... really impressed!
To test if it POST, you can really also do without any cooler ... just keep a finger on top of the CPU ... turn it off as soon as it POST or you cannot keep your finger on the CPU anymore ...

Use isopropyl alcohol to clean the CPU heatsink from your fingertips ...
 
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636ride158702e1

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Really a fantastic build ... 2 radiators, double fans everywhere, rigid tubing, colored coolant ... really impressed!
To test if it POST, you can really also do without any cooler ... just keep a finger on top of the CPU ... turn it off as soon as it POST or you cannot keep your finger on the CPU anymore ...

Use isopropyl alcohol to clean the CPU heatsink from your fingertips ...
Thanks, I actually have 3 radiators :) Two in the front and one up top and all double stacked. I'm about to start pulling SSD's and RAM and see if I can get any different result before I drain and pull the processor. I guess I will wait until tomorrow to drain it giving myself one last chance to talk to MSI support just in case they have any ideas.
 

Alan J T

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So I guess I would just use a stock fan on the CPU to test it prior to and then reconnect all of my water cooling? Now that I think about it I guess it makes sense. The whole water cooling thing has turned my head into mush.
Test rig Cooler on CPU one ram stick and a gpu on a cardboard box with the PSU and a HDMI cable and monitor and keyboard is all ya need.
Once you get post power off install rest of ram one SSD drive for your OS and restart the PC Config the BIOS and install windows to make sure all hardware working if all good build your PC

Should all ways be done before you start a new build to avoid ending up with the problem you now face.

Screenshot 2021-07-08 120721.jpg
 

Alan J T

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Yepp pull all RAM but one stick pull all SSD in it for now as not needed to get a post, Check all cables connected correctly if you using Custom cables change to the ones that you got with your PSU Have you also plugged in all the CPU power cables on the top of the board as can not be seen in photo due to RAD

Check all Pins on Motherboard USB Headers, Fan headers ect to make sure none are bent, Make sure you have no more that 3 Fans connected per Fan headed max on them is three fans or 1 amp load.
 

636ride158702e1

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Test rig Cooler on CPU one ram stick and a gpu on a cardboard box with the PSU and a HDMI cable and monitor and keyboard is all ya need.
Once you get post power off install rest of ram one SSD drive for your OS and restart the PC Config the BIOS and install windows to make sure all hardware working if all good build your PC

Should all ways be done before you start a new build to avoid ending up with the problem you now face.

View attachment 152803
Haha that is awesome. Good idea too.
 

636ride158702e1

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I solved the problem, and maybe one of you can tell me why this was an issue. So yesterday I started pulling SSDs and in the process I had to pull this little PCI card that was supposed to give me more USB type C headers since my motherboard only supports on type C header and I couldn't find a splitter like the USB 3.0 headers use. My case has two USB type C ports and I hate having dead ports. Someone on another forum showed me this card and I bought it and hooked it up. Anyway after I pulled the card to get to my SSD's I booted and the system no longer got an error for the CPU, it was getting an error for not knowing which drive to boot from. That sounded good to me so I hooked up the monitor and it was in bios. I slowing started adding in more SSDs and rebooting until I had them all in and it booted to BIOS every time so I was clueless as to why but happy none the less. After installing windows and getting everything else going I decided to start putting back on things I took off like my cable extenders to the CPU power and that little PCI card. When I did and booted it back up I started getting that CPU fail error again. Turns out the whole time it was that stupid card. But why? A pic of the card is below.
IMG_4836.jpg
 

Svet

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Is there any brand/model info for this pci-e card?
 

Alan J T

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It has a Asmedia controller on it so it should be compatible. Best guess is that it has a fault and was causing a short to the board halting post.

But good to know you up and running now without the need to strip the System cooling out

Other possibility is a bent pin in the PCIE slot causing the problem
You can also try the other PCIE slot, Bottom one runs of the chipset may get more luck with that one As I think your first two PCIE x16 slots run of the CPU and bottom is run via the Chipset.

As some times you can get strane combaliaty problems.
 

Svet

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Yes, if you can test this card in another PC to see if it's working 1st to isolate the issue.
 

636ride158702e1

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Yes, if you can test this card in another PC to see if it's working 1st to isolate the issue.
I have another PC I can plug it in to, but that one doesn't have any USB type C ports to connect it to anything. I may see If I can get to one of the bottom PCI slots, its a little difficult with the way my vertical GPU is setup though. Bummer this thing isn't working. I thought maybe I plugged the SATA power in the wrong spot on the PSU but that is even harder to get to now. I would have to drain the system just to get in there and that isn't happening.
 
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