I had a similar thing with a psu and the extra 8 pin power cable, the mobo drew too much power for it and melted the plastic around the connection on an extension cable. Lesson learned, new psu, no cheap extension cable for my overclocked cpu. But I'm surprised you didn't spot the melted psu connector.
Try a reformat and a disk checking software to see if the ssd is recoverable.
At least the cpu is under warranty, and your gpu is safe
Speaking to the guy who built my pc for me (the PSU is 2nd hand), the melted connector isnt actually used, so should be ok.
The SSD is physically broken due to an installation error. I'll ask them to attempt to recover the contents, but I didn't have anything important on it, just some video games that's all. So I'm not fussed about recovering it. I've got my windows key saved separately and it's linked to my account too.
Just sucks that I got a duff CPU