RAM swapped to Corsair - no bleeps
Was this with the GPU in the board.
GPU installed (with Corsair) - back to 3 bleeps.
Which RAM was in the board at the time.
I tried swapping the CPU and am wondering if I was giving false information.
Please don't go off and do things on your own, troubleshooting from afar is hard enough on its own so you doing stuff that we know nothing about makes things impossible.
BIOS beeps do vary both by meaning and by BIOS vendor, three rapid BIOS error beeps commonly means bad RAM while three long = a keyboard error or bad RAM for some BIOS vendors.