Help with 7950x and 4090 build not posting

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1

7950x + 4090 does not post. HELP NEEDED!

Parts:
Mobo: Msi Meg X670E Ace
CPU: AMD R9 7950x
RAM: Corsair Dominator RGB DDR5 32GB @ 5600MT C36 (Black)
GPU: Gigabyte RTX 4090 Gaming OC
PSU: Thermaltake Toughpower GF3 1650W (ATX 3.0 + PCIE 5.0 native)
SSD: Samsung 980 Pro 2TB

Problems:
•Display port and HDMI do not output anything from GPU, mobo has a usb-c to display port so ill have to try that
•BOTH Red and Orange debug leds with code 15 then 22 while all the parts are lighting up with rgb.
•Power Button does not shut the pc off only on.
•GPU LEDs do not light up and the fans do not spin

Attempted Solutions:
•Cleared CMOS
•Did the power button + psu switch trick to no avail
•flashed bios with 9/27 one from website
•Took pc apart and attempted post with the same problems
•switched out power cords
• did all of the above multiple times while reseating each part in an attempt to narrow down a possible hardware failure

Conclusion:
I need some help really badly, this setup costs a fortune and after three days of troubleshooting ive gotten nowhere. there is zero info online regarding any of this new stuff so posting my problem to subs and forums is all i can hope for. documentation from the companies themselves are somehow less detailed than random youtube videos.

Update:
Tried to post from mobo didnt work.
switched out ram didnt work.
i cant get a thing to the screen so i cant install windows or see the bios.
This setup will never work

Update 2:
Flashed bios and got the debug code to simply read cpu temps and no more leds. However, still cannot anything on the screen. tried from mobo and gpu, tried both, no dice.

Update 3:

I’ve tried everything at this point this shit will just NOT post. Time to hang myself.

2

Just a guess but it’s probably default to the igpu until you tell it in bios to use your dgpu as default… used to be a problem on my old mobos…

2 Likes
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thanks man! that’s my next step

4

Could you try to boot without the 4090 installed?

Also be aware the first boot apparently takes a ridiculously long time due to memory training. Several minutes of nothing on screen apparently as it does memory training.

I have a 7950x and 4090 on the way so following this thread with interest

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Try booting into windows using the igpu video output and then install the nvidia software. JayzTwoCents had a similar problem, and may well be better than me at explaining how to get around it.

3 Likes
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Relevant Twitter thread from Hardware Unboxed.

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Update:
stopped by microcenter to grab 32gb of gskill ddr5 of course, CL36 at 6000MT/s.
uninstalled the 4090, cleared cmos, and installed ram. I hooked up the usb-c to displayport from my mobo and got the same red and orange leds with code 15, few seconds later, same thing except code 22. I tried using a single dimm still no post.

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Okay now I’m getting C5

1 Like
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nothing

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00 now both red/orange

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same red and orange leds on the entire time. im back at 15 then 22. this is starting to get hopeless

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except nothing comes out of the igpu either

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How long are you leaving it when it’s booting up before turning it off?

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I would try waiting half an hour for the ram training and booting and installing Windows 10, Geforce Experience, then replacing IGPU with the 4090. I had the same problem with my x570 Taichi.

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https://download.msi.com/archive/mnu_exe/mb/MEGX670EACE.pdf - Here is the manual for anyone helping.

This sounds like an issues with the motherboard.
This guy has the same motherboard and is have ram issues

Same guy

New guy with ram problems

In the manual code 15 is Pre-memory System Agent initialization is started

There is no code 22 in the manual

on the MSI form thread code 22 is listed as OEM pre-memory initialization codes.

According to the manual page 60
Red LED - indicates CPU is not detected or fail.
yellow LED - indicates DRAM is not detected or fail.
White LED - indicates GPU is not detected or fail.
Green LED - indicates the booting device is not detected or fail.

If you are seeing an orange led it might really be yellow as Red and yellow mix would make orange.

Try this trouble shooting work flow. With just the Mobo, CPU, RAM and PSU
Step 1
Try booting you computer with no ram you should get code 10 and just a yellow.

Step 2
Try booting with one stick in dimm slot 1 and give it 30 mins to boot.

Step 3
Repeat Step 2 but with dimm slot 2 - 4

you might wish to try checking the motherboard cpu socket pins are not bent and try reseating the cpu. If the pins don’t make contact you can have all sorts of problems

You can also ask the store that you purchase your CPU and motherboard from if they can help you trouble shoot your issue. If there is a problem with the motherboard or CPU they should replace it under warranty.

Hopefully you find something in this post helpful.

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Did you ever get this sorted? I’m having a very similar issue with an MSI PRO-X670-P board. The most negative report on Newegg re: the PRO board sounds exactly the same as mine - the (useless IMHO) EZ Debug lights for CPU & RAM come on soon as power is applied, nothing from either iGPU (7950X) or dGPU. It seems that AM5 MSI boards have significant problems with, dare I say it, a number DOA. I’ve never had a DOA board before (put together 8 PCs over the years with different manufacturer mobos, mostly MSI).

Did you figure out the issue, get the board RMA’d, use a different board, …?

Thanks.

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