General Discussions

[sapphiretr]

This is my third build with AMD Thredripper PRO 7995WX and this time there is no power and no boot.
The power butoon has red light on the Motherboard and greed light on the reset button.  There is no error messages or codes. No power on the Error debug screen too.
All the power cables are plugged correctly as my previous builds. (CPU_12V(1), CPU_12V(2), 24 pin and PCIE_8P(1) cables are plugged correctly.
But when I press the power button there is no power coming the to Motherboard and the CPU fans. And it is the same when i touched to the power pins on the F-Panel too.

What i have done and no change:
- checked the cpu pins and mobo pins. No damage, no any anormal thing.
- changed the psu with a new one.
- changed gpu
- tried only one RAM A1 slot
- cleared CMOS
- changed cpu fans too
- unplug ssd
- removed the cpu and install again
- last of all i tried with TRX50 Mobo and the same (no boot and no power)

My config:

Asus WRX90e Sage SE Motherboard

AMD Threadripper pro 7995wx

Kingston 5600 ECC (It is in the QVL list)

Corsair 170I Elite Capellix

FSP 2000W / Lian Li 1000W
RTX 5090 / GTX 1070

Any suggestions for the problem? I have no idea what is not working.

[FunkZ]

Does the motherboard support BIOS flashback? This is a feature on some boards that allows BIOS flash from a rear USB port without CPU, RAM or any peripherals connected.

If supported, try flashing the board to the latest BIOS.

[sapphiretr]

Yes but there is no power. Without that power I can not update BIOS.

[FunkZ]

Assuming you have followed the instructions laid out in Chapter 2.5 (starting page 2-14) of the user manual, and still not getting power to the board, you will need to contact ASUS support.

https://dlcdnets.asus.com/pub/ASUS/mb/SocketsTR5/Pro_WS_WRX90E-SAGE_SE/E25489_Pro_WS_WRX90E-SAGE_SE_...

[sapphiretr]

This is my third build with the same cpu and mobo. I did not do any different work regarding the build, I even checked the previous builds for errors many times, everything is the same. By the way, the other 2 previous systems are working without any problems.

I ordered the same Motherboard and it is coming tomorrow. I will try with that. If the problem persists I will send the CPU back.
Besides i tried also with TRX50 and the same power problem exist but i will sure with WRX90.

[BigAl01]

Are you sure you are using momentary contact power and reset switches?  Have you tried another set of power / reset switches?  I assume it isn't the PSU power toggle switch on the back of the unit if you have any LEDs illuminated, but I would flip that switch a few times too.  

Another possibility is shorting between the motherboard and the case.  I usually build my computers outside of the case if I can, just to make sure it works before I install everything inside the case.  Try pulling the motherboard out and placing it on the work surface if you can.

[sapphiretr]

After having that problem i took out the motherboard from the case and tried the possibilities bu no power and no boot again.
Asus WRX90 motherboard has power and reset buttons(indicated as 34 on the picture above) on itself. I also tried the F-Panel (indicated as 35 on the picture above) power sw. No change.

[sapphiretr]

I solved the problem.
I bought the processor as tray package because I couldn’t find it in a box. The processor was removed from its orange plastic and turned upside down. The triangle mark on the top left corner of the processor was at the bottom when it was installed on the motherboard. The motherboard cuts off the power because of this.
This realization was also very interesting. When someone who encountered the same problem on this forum wrote that he was scammed by a 5000 series processor instead of a 7000 series, I noticed at the last moment that the processor was installed upside down while checking the processor to see if something like this happened to him.
I will be adding the pictures showing the correct and incorrect placements to this message in case it helps someone else later. I installed the processor correctly now and the system immediately worked normally. Thank you to those who are interested and answered. I hope this topic will be helpful to those who experience such a problem later.
Also interesting is that when you insert the AMD Threadripper Pro 7000 series processor into the motherboard correctly, the AMD logo is upside down.
My advice to you is to definitely buy a $10K processor in a box. If you absolutely have to buy a tray, check it very carefully when buying.

Correct placementWrong placementIt is working now !

[BigAl01]

Glad to hear that you solved the problem.  With the older design CPUs (pins on the back of the CPU, and holes in the socket) you couldn't insert the CPU incorrectly without forcing it and thus bending pins.  I'm surprised that it's possible to insert the newer design CPU into the socket incorrectly.  There should be a notch or something to allow insertion only one way in my opinion.