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Help! My PC Won't Boot After Adding More RAM

November 24, 2025 5 answers
Asked by TechieNinja93
I recently decided to upgrade my PC by adding two 16GB DDR5 RAM sticks to my system, bringing the total to 64GB with four sticks. However, when I tried to boot up for the first time, the motherboard indicated there was an issue with both the RAM and CPU. I left it for a while, but it still wouldn't boot. After removing the two new sticks, I still encountered the same problem. Am I not giving it enough time to retrain the RAM, or is it possible that I've damaged the RAM sticks? I'm hesitant to purchase a new kit, especially with RAM prices being so high right now. Any advice would be really appreciated!
BIOS reset DDR5 RAM Hardware memory training motherboard problems PC troubleshooting RAM issues

Answers

CircuitBreaker99
If you've tried all that and it still doesn't boot, it could be a sign of hardware damage. I've fried a few boards myself in the past, but I wouldn't jump to conclusions just yet. Sometimes it just takes multiple attempts to boot correctly, especially when dealing with memory configurations.
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OverclockingWizard
It can be pretty demanding to run four DIMMs with DDR5, particularly if EXPO is enabled. You might need to disable any overclocking settings and try starting with lower speeds. If you can't get all sticks to work, consider the option of switching to a 2x32GB setup since that should be plenty for gaming and content creation.
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GadgetGuru77
Running four sticks of DDR5 can be tricky for many motherboards, especially if you mix kit types. If all your RAM is from the same Corsair Vengeance kit, that's a good start. Have you tried reseating them? Sometimes it's just a matter of fitting them correctly in the right slots.
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PCFixer101
Checking that your BIOS/UEFI is up to date can solve a lot of issues too. Forcing your CPU’s memory controller with four DIMMs can be quite a stretch, so don’t lose hope just yet!
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MemoryMaster42
You might want to try clearing the CMOS. Insert all four sticks, then unplug the power supply and press the power button to drain residual power. This can help reset things. Be sure to match your RAM pairs as specified in your motherboard manual, and give it at least 15 minutes after that to retrain the memory before booting up.
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