Try swapping your SATA power/data cables with new or different ones. I'd also try using different SATA headers on your motherboard (like the one your SSD is using).

That way you'll be able to diagnose where the problem is.

Try swapping your SATA power/data cables with new or different ones. I'd also try using different SATA headers on your motherboard (like the one your SSD is using). That way you'll be able to diagnose where the problem is.