I assembled a PC using a mix of new and older parts, but initially got no video output. The build includes a new RX 9060 XT 16GB, Samsung 990 2TB SSD, Ryzen 7 5800X, a second-hand X570 Aorus Gaming Elite motherboard, 2x16GB G.Skill DDR4-3200 CL16 memory, and a 450W SFX power supply. The fans and motherboard RGB turn on, and I updated the BIOS using Q-Flash. I also tested the graphics card directly in the motherboard without a riser. The CPU, RAM, and power supply worked together several years ago, but the system would not display anything this time. Removing the graphics card made the keyboard and motherboard lighting come on, though the 5800X has no integrated graphics. After resetting the BIOS and removing one RAM stick, I was able to enter the BIOS. What was likely causing the problem, and what should I check before continuing?
2 Answers
The power supply is worth checking too. A 450W SFX unit may be marginal for a Ryzen 7 5800X and a modern graphics card, especially if it is several years old. Make sure the GPU power cables are fully connected and avoid relying on questionable adapters. If the machine still fails with both RAM sticks installed, test with a known-good, higher-capacity PSU and inspect the motherboard and GPU for damage.
Since resetting the BIOS and removing one memory stick let you reach the BIOS, the most likely issue was memory training, a bad seating/contact issue, or an unstable DIMM configuration. Test each stick individually in the recommended slot, usually A2, then try both sticks in the proper paired slots. Once the system is stable, enable the memory profile and confirm it can boot reliably.
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