ColeIsDaBest

Okay good luck, let me know if you get it to work. Worst case you can use it in another system in the future.

You'd need other ram sticks in order to check. Do you have any others?

That would do it. Poor thing probably just cannot keep up.

Yeah I'm starting to think the CPU or motherboard is dead. These error codes do not make any sense.

CPU led, interesting. CPU failures are pretty rare but not unheard of. Has this system worked in the past or are these new components? I also have an ASUS board, sometimes it reports RAM issues as CPU errors so I would not say it's 100% the CPU yet. How many ram sticks are you using? I know you said you tried reseating the RAM, but can you try again now that we are getting different codes? I you have multiple sticks can you try using only one in all the slots and then try the other one in all the slots?

Yeah that is a pretty low level function though, there are a lot of things higher up that need to be working properly for the computer to start up. I was once working on a motherboard which appeared fine, but was not actually delivering ATX 12V power to the CPU, so everything else was working fine (Fans, lights, drives spinning, GPU fans, etc...) but it would get farther into the boot sequence without the CPU power cable inserted. Ended up reviving that board after watching Linus's video on putting board inside the oven to reflow solder, but it promptly died a few days later :P. Also, having LEDs lit up does not necessarily mean the PSU is "working". The PSU has different operating modes and it needs to switch to a higher power mode to power up the computer. If the PSU is unable to do this the computer will not start.

Ok, is this with the GPU / RAM installed? Can you plug in a keyboard and tell me if the Numlock LED indicator turns on? Also when the board is booting try pressing the caps lock key and see if the caps lock indicator turns on. These are good indicators of low level functions so I'm curious what happens. Can you keep a close eye on these LEDs and tell me what they are doing? I'm particularly interested in what the last one to be illuminated is before it restarts.

Okay what do you mean by that, there are several kinds of boot looping. Does anything come up on the display? Can you send a video of it? This is really good progress by the way.

"00"? That code is "Not Used".... Okay can you install the CPU cooler properly now (No need to replace thermal paste yet, just secure it with the screws) and install the RAM and GPU.

Okay this is a Hail Mary, can you reseat the CPU? Take off the heatsink and remove the CPU from the socket (Leaving the thermal paste on) then inspect the socket for bent pins and the back of the CPU for burn marks. If you see no issues then reinstall the CPU carefully and place the cooler back on. If the motherboard is on it's back you don't need to screw in the cooler yet, just place it on top so it's making contact. You don't need to replace the thermal paste for now, we are just trying to see if we can get it to start / give a different post code at all. If it does give a different code it will not be putting out too much heat long enough to be of concern, try to power off the system though and don't let it sit too long. If this doesn't work try again a second time. Let me know what happens.

Yikes that's not good. It's happening really early on. Can you try the BIOS switch thing? Your board comes with two BIOS chips so this may solve it. Also can you make sure the PCIe lane switch is in the right positions?

According to https://www.evga.com/articles/00960/EVGA-1000-850-750-650-GQ-Power-Supplies/ "The EVGA ECO mode feature ensures that the power supply stays completely silent during low to medium loads. The fan does not spin until necessary, allowing for completely silent operation!" Damn it. When you do the test you'll need to try to listen for any clicks / coil whine from the PSU instead since the fan will not spin unless it is under high load. Also EVGA power supplies are really good in my experience and I've never seen one fail, so my gut feeling is moving towards a dead motherboard now.

Okay and you plugged in the 8pin CPU cable from your power supply into the 8pin CPU header at the top of the board right? You likely do not need to use the other 4pin one, that is usually only if you install a really power hungry CPU and do heavy overclocking. I ran one of my machines for years without using the extra 4pin CPU power.

Yeah You need to quote me in, just saw this now. What power connector is this? CPU (4pin, maybe 8pin) or GPU (PCIe 6pin or 8pin) If it does the same thing without the GPU installed at all that means the error is happening prior to ever getting to the GPU. Can you try again with no memory installed? I'm trying to determine where in the boot sequence it's failing.

Nah, you'd get fan spin even with a dead, faulty or non existent CPU, GPU or RAM. It's likely the motherboard or power supply. Can you follow this guide and tell me what you find? https://www.techdim.com/test-computer-power-supply/ I'm mostly interested in the "Checking if PSU Powers On" section. Can you tell me what model the power supply is? It may be a fancy one and not turn the fan on under low loads, so I need to know if that's the case.