Question MSI B450 Gaming Pro Carbon Max Wifi and AMD 5700x3D won't boot

[Similisora]

Hello,

I recently received a new CPU (AMD Ryzen 5700x3D) but I can't start my PC with it, it is stuck on the CPU red light on my motherboard. I litterally tried everything I found on Internet (reddit, MSI, AMD, etc.) but nothing worked for me.

Before this, I had an ADM Ryzen 3600 and everythings was working fine. If I put it back, this is ok.

There is my setup :​

• Motherboard : B450 GAMING PRO CARBON MAX WIFI
• CPU (old -> new) : AMD Ryzen 5 3600 -> AMD Ryzen 7 5700x3D
• GPU : GeForce RTX™ 2060 GAMING Z 6G
• RAM : Corsair VENGEANCELPX16GB (2 x 8 Go) DDR4 3600 (Pc4-28800) C181.35V
• PSU : Seasonic Core GM - 650W (80 + Gold)
• SSD 1 (OS) : Samsung 970 EVO Plus
• SSD 2 (Data) : Samsung SSD 860

What I have already tried :​

MOBO side :

• I flashed the bios to the version recommanded on the official MSI support site (7B85v2E). Then I tried the latest beta version (7B85v2G1). Same thing, still stuck with CPU red light.
• I checked if CPU was really ok for my B450 mobo, and yes : https://fr.msi.com/Motherboard/B450-GAMING-PRO-CARBON-MAX-WIFI/support#cpu
• I cleared the CMOS : first I use the jumper (shorting the two pins with a screwdriver), then I removed the battery (>15 min) and press power button to drain all remaining electricity).

CPU side :

• There is no pin bent on the CPU. A tech store near from my house tested it on an other mobo and they confirm me that it's working. So it's not an issue about the CPU.
• I bought an AMD Ryzen 5700x (not 3D) and everything works with it.
• I tried to wait 5min while booting but still stuck on CPU red light.

Memory side :

• I tried to boot with only one RAM : same issue. I tried the 4 slots.
• I removed the 2 RAM : the red light goes to DRAM. So CPU seems POST. But as I said, the CPU is working on another mobo.
• I checked the RAM compatibility and it seems OK (DDR4 3600). The tech in the store tried with another RAM and still won't boot.

PSU side :

• I checked the PSU connected to the 8 CPU PWR pins : all seems fine. I don't think I need the last 4 for a 105W CPU.

So it seems to be an issue with the BIOS, as the 5700x works but the 3D does not (new 5000 series). On the MSI support page, the 5700x doesn't need the same recent update.

But my BIOS is up to date so I don't understand (I checked the version on BIOS and Windows 11).



Guys I'm really lost, I don't know what to do anymore but since this should work, I don't want to give up now.



Do you have any idea ?

 

[steveb1976]

try and take out ssd(or nvme) and power on, if you get to bios , then the drive is the issue...

what windows version are you using.. i know its window 11, , but is it 23h2 or 24h2...

win 24h2 forces hard drives to us HMB higher that 23h2, (this will only affect drives without "DRAM" what hard drive do you use?

 

[Similisora]

try and take out ssd(or nvme) and power on, if you get to bios , then the drive is the issue...

what windows version are you using.. i know its window 11, , but is it 23h2 or 24h2...

win 24h2 forces hard drives to us HMB higher that 23h2, (this will only affect drives without "DRAM" what hard drive do you use?

SSD nvme Samsung 970 evo plus
SSD sata Samsung 870 evo

I think I have the last version available of w11

 

[Similisora]

SSD nvme Samsung 970 evo plus
SSD sata Samsung 870 evo

I think I have the last version available of w11

Btw since this upgrade I have the error message « A security setting is detecting this as a vuljetable driver and blocking it from loading ». About AMDRyzenMasterDriver.sys

Don’t know if it could be linked but I don’t think so because its link to Windows, not the BIOS ?

 

[triplex1]

If I remember correctly, I told you earlier that if you have an extra disk, try doing a clean install.From Ryzenmaster, if you get an error, reinstall it and it will fix it.

 

[Paistikas]

Hello,

I recently received a new CPU (AMD Ryzen 5700x3D) but I can't start my PC with it, it is stuck on the CPU red light on my motherboard. I litterally tried everything I found on Internet (reddit, MSI, AMD, etc.) but nothing worked for me.

Before this, I had an ADM Ryzen 3600 and everythings was working fine. If I put it back, this is ok.

There is my setup :​

• Motherboard : B450 GAMING PRO CARBON MAX WIFI
• CPU (old -> new) : AMD Ryzen 5 3600 -> AMD Ryzen 7 5700x3D
• GPU : GeForce RTX™ 2060 GAMING Z 6G
• RAM : Corsair VENGEANCELPX16GB (2 x 8 Go) DDR4 3600 (Pc4-28800) C181.35V
• PSU : Seasonic Core GM - 650W (80 + Gold)
• SSD 1 (OS) : Samsung 970 EVO Plus
• SSD 2 (Data) : Samsung SSD 860

What I have already tried :​

MOBO side :

• I flashed the bios to the version recommanded on the official MSI support site (7B85v2E). Then I tried the latest beta version (7B85v2G1). Same thing, still stuck with CPU red light.
• I checked if CPU was really ok for my B450 mobo, and yes : https://fr.msi.com/Motherboard/B450-GAMING-PRO-CARBON-MAX-WIFI/support#cpu
• I cleared the CMOS : first I use the jumper (shorting the two pins with a screwdriver), then I removed the battery (>15 min) and press power button to drain all remaining electricity).

CPU side :

• There is no pin bent on the CPU. A tech store near from my house tested it on an other mobo and they confirm me that it's working. So it's not an issue about the CPU.
• I bought an AMD Ryzen 5700x (not 3D) and everything works with it.
• I tried to wait 5min while booting but still stuck on CPU red light.

Memory side :

• I tried to boot with only one RAM : same issue. I tried the 4 slots.
• I removed the 2 RAM : the red light goes to DRAM. So CPU seems POST. But as I said, the CPU is working on another mobo.
• I checked the RAM compatibility and it seems OK (DDR4 3600). The tech in the store tried with another RAM and still won't boot.

PSU side :

• I checked the PSU connected to the 8 CPU PWR pins : all seems fine. I don't think I need the last 4 for a 105W CPU.

So it seems to be an issue with the BIOS, as the 5700x works but the 3D does not (new 5000 series). On the MSI support page, the 5700x doesn't need the same recent update.

But my BIOS is up to date so I don't understand (I checked the version on BIOS and Windows 11).



Guys I'm really lost, I don't know what to do anymore but since this should work, I don't want to give up now.



Do you have any idea ?

Hello stranger. I am unfortunately in the exact same situation as you are.
I had Ryzen 5 3600 and I switched to Ryzen 7 5700x3D. Never get anywhere other than BIOS screen where I can update the BIOS until the world ends.

My setup:
Ryzen 7 5700x3D
MSI B450 Gaming Pro Carbon AC
Kingston FURY Renegade RGB DDR4 3600 MHz CL16 32 Gt
Some 650w PSU
Windows 10

So far I have tried:

• Flash the BIOS with a USB stick and the handy button located in the motherboard -> It did something but didn't help
• Update the BIOS from BIOS screen with M-Flash. Using a USB stick with this update 7B85v1H4(Beta version). The BIOS screen shows that my BIOS version is E7B85AMS.1H4 (which I think matches the update file) so it did update it
• Tried three different older update files (someone said 7B85v1G should definately work)
• Reset the CMOS thingy with jumping the jbat1 AND removed the battery for a really long time - All that did was reset my BIOS clock. The version is still the same
• Lower the MHz on my memory all the way down to 1600 MHz - No help. Some say that 5700x3D only supports 3200 MHz

When I turn my computer on it flashes the CPU debug red light I think two or three times and the computer goes automatically to BIOS setup screen. If I exit from the setup it just loops back to it after the computer restarts.

Did you get anywhere with your issue or are we together on this?

 

[steveb1976]

clear c-mos.(pull battery for 5-10 minute.. optional). then power on.. and you should see the computer reboot a few times. let it do this , it might take about 5-10 minutes. and seem like its doing nothing.. but be patient.. and then it shoud boot into bios or windows (if drives are detected). if nothing.. then turn of for 5 minutes.(press power button to clear any power in pc.. .. turn on again and see if it boots into bios or windows. look at your keyboard for any signs of life.(lights coming on) and the debug lights on motherboard. if still nothing.. you can try
holding down "power button + reset button" together at same time for 10 seconds and then RELEASE.. this will kick in your "Backup bios" (most motherboards have them. and it should kick into bios or windows. you could also try putting in old cpu and seeing if you get into bios or windows. if so it might be the new cpu has issue.

also when you did the bio flash... did you do it via Bios part or the " bios flashback" or rear of motheboard.. as you would need to change "rom file name and extension" (for bios flashback)

 

[triplex1]

Hello stranger. I am unfortunately in the exact same situation as you are.
I had Ryzen 5 3600 and I switched to Ryzen 7 5700x3D. Never get anywhere other than BIOS screen where I can update the BIOS until the world ends.

My setup:
Ryzen 7 5700x3D
MSI B460 Gaming Pro Carbon AC
Kingston FURY Renegade RGB DDR4 3600 MHz CL16 32 Gt
Some 650w PSU
Windows 10

So far I have tried:

• Flash the BIOS with a USB stick and the handy button located in the motherboard -> It did something but didn't help
• Update the BIOS from BIOS screen with M-Flash. Using a USB stick with this update 7B85v1H4(Beta version). The BIOS screen shows that my BIOS version is E7B85AMS.1H4 (which I think matches the update file) so it did update it
• Tried three different older update files (someone said 7B85v1G should definately work)
• Reset the CMOS thingy with jumping the jbat1 AND removed the battery for a really long time - All that did was reset my BIOS clock. The version is still the same
• Lower the MHz on my memory all the way down to 1600 MHz - No help. Some say that 5700x3D only supports 3200 MHz

When I turn my computer on it flashes the CPU debug red light I think two or three times and the computer goes automatically to BIOS setup screen. If I exit from the setup it just loops back to it after the computer restarts.

Did you get anywhere with your issue or are we together on this?

MSI B460 Gaming Pro Carbon AC
You're making a mistake somewhere, the motherboard you're talking about isn't AMD.

 

[Paistikas]

MSI B460 Gaming Pro Carbon AC
You're making a mistake somewhere, the motherboard you're talking about isn't AMD.

You are correct. B450 is what I ment.