| CPU | GPU | MOBO | RAM | PSU |
| AMD Ryzen 5 3600 | Gigabyte GeForce RTX 3080 EAGLE OC (10GB) | ASUS ROG STRIX B550-E GAMING | HyperX Fury (1x, 16GB, DDR4-3200, DIMM 288) | Corsair AX (850W) |
I am trying to assemble a new PC with the parts above. First I got everything but the PSU, but realized that my 8 years old PSU did not have any cables for the CPU after assembling it. I could turn on the PC, both the CPU, GPU and case fans turned on, but the CPU did not boot because it did not have enough power. There was a red LED button indicating that.
I let everything assembled in the case and let it stand for two days until the new PSU arrived. I switched the PSUs, hooked the 24 pin cable for the motherboard , four SATA connections (2 HDD, 1 SSD, 1 cable for the case), the 8 pin for the CPU and the 2x8 pin for the GPU.
After plugging in and turning on the PSU, the decorating LEDs on the motherboard went on. Full of excitement, I pushed the power button, but to my disappointment nothing happened. No fans, no noise, no red LEDs nothing.
So far I've tried the following before trying to boot:
Take out the GPU
Unplug every SATA except for my SSD with the boot partition
Move the memory to every slot (originally it was in the recommended second slot)
Switch the mother board to see if the power button is broken, it worked
Re-plug front panel connectors
Jump the motherboard
Connect additional 4 pins for the CPU
Take out cmos battery for a few minutes and put it back
Pull out every single cable from the PSU and plug it back
I've spent many hours trying to come up with a possible fix but I'm at my wits end. I will proceed to disassemble everything and start from scratch, any ideas are welcome in the meanwhile.
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