I recently built my own PC and I'm having trouble because it won't POST and nothing shows up on the screen. Here's what I've assembled: AMD Ryzen 9950x3d, 32GB of Gskill RAM, an ASUS 870-P motherboard, a Thermalright Peerless Assassin tower cooler, an XFX RX 9070 XT graphics card, a Super Flower Leadex PSY power supply, and a Samsung 990 EVO 2TB SSD. I took my time over a few days due to work, double-checked that everything is seated properly and connected to the PSU. When I turn it on, the RGB lights and fans come to life, but the GPU output isn't showing anything. The fans on the GPU aren't spinning either, although there's a light on the GPU shroud. Unfortunately, I can't see the POST LEDs on the motherboard, so I'm really stuck trying to figure out what the problem could be.
5 Answers
Try using just one stick of RAM in the second slot. If that doesn’t boot, swap it out with the other stick in different slots. If it still doesn’t work, start investigating the individual components, starting with the PSU and all the connections.
What’s the wattage on your PSU? Sometimes, underpowered systems can lead to issues like this. If you’ve got an 850W, that should be sufficient, but always good to double-check.
One thing you could try is removing your graphics card and connecting your monitor directly to the motherboard. This way, you can see if the onboard graphics work at all, giving you more information about where the issue might be.
It’s worth noting that AM5 CPUs can take a bit longer on their first boot due to memory training, especially if you have four sticks of RAM. Sometimes they can take 5 to 12 minutes! Try booting with just two sticks or even just one module in the second slot. Oh, and make sure you’ve connected the CPU power cables on the motherboard. Remember, GPU fans usually don’t spin unless there’s a load.
Definitely try booting with just the integrated graphics for now. If that works, then it’s likely an issue with the GPU. It’s a good way to narrow down the problem.
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