Issue with PC when switching CPU from Ryzen 5 4600G to Ryzen 7 5800x
Issue with PC when switching CPU from Ryzen 5 4600G to Ryzen 7 5800x
Hello, I'm having trouble getting my PC to post after a CPU upgrade. When swapping CPUs my MOBO will go through the posting process before getting stuck on the white VGA light, the green BOOT light will light up shortly afterwards (The VGA light stays on). I updated the BIOS to the most recent version (5003), there is no visible damage to the CPU.
I have tried booting after removing and reinstering the CMOS battery and without the CMOS battery
I have tried reseating the CPU multiple times
I have tried booting with and without the GPU
I have tried booting with one stick of RAM
I have gently cleaned the contacts on the new CPU with alcohol and a toothbrush
Upon reinserting the old CPU the computer boots just fine.
MOBO: Asus TUF x570-Plus Wifi
Old CPU: Ryzen 5 4600G
New CPU: Ryzen 7 5800x
GPU: MSI Ventus GeForce RTX 4070 12GB
RAM: 2 X 8 DDR4-3600
PSU: Corsair RM750x White 750W 80+ Gold
Storage: 1 TB SSD, 250 GB SSD, 3 TB HDD
Was die CPU neu gekauft oder gebraucht? Wo hast du sie erworben?
Before giving up and returning it, there are two suggestions I’d suggest.
Initially, attempt a thorough reset. Follow the instructions precisely. It may not fix everything, but it could. Over the years, many users here and on my workbench have found this method effective when other options fail. Avoid a partial approach. Simply swapping out and reinserting the CMOS battery isn’t the same as this process. It could help or it might not, but it’s always worth trying when a new CPU or graphics card refuses to cooperate.
BIOS Hard Reset procedure
Turn off the device, power down the power supply, and detach the PSU cable from the wall or supply unit.
Take out the CMOS battery on the motherboard for roughly three to five minutes. In certain situations, you may need to remove the graphics card to access it.
While the battery is removed, keep pressing the power button on the case continuously for 15–30 seconds to drain any remaining charge in the CMOS circuit. Once the time is up, reinsert the battery carefully, making sure it’s oriented correctly.
If you had to remove the graphics card, you can reinstall it now, but be sure to reconnect any power cables and your display cable.
Reattach the PSU power cable, turn the power back on, and restart the system. It should show the POST screen and offer options to set up CMOS/BIOS. Enter the BIOS setup, adjust boot settings for Windows or legacy systems, and if needed, configure OS-specific parameters like XMP profiles, fan settings, or memory configurations.
Save your changes and exit. If the system successfully boots, you can proceed further—reverting to BIOS settings as required.
In some instances, after resetting the BIOS, it may be necessary to load default or optimal values in the BIOS to restore hardware tables properly.
It’s also important to consider alternative displays if the issue stems from a video signal problem. Trying HDMI can be beneficial, especially if you’re experiencing display issues or visual difficulties that prevent accessing BIOS.
If a different monitor works, it’s a good solution.
Lastly, if the CPU cooler is involved, check that the alignment marks match between the CPU and motherboard. If they do, remove the CPU and inspect for bent pins. If not, the fault is likely with the CPU itself.