So, after some troubleshooting I think some of the SATA ports on my motherboard have given up the ghost. While buying a new mobo would be the ideal option, I'm on LGA1150 which is a dead end and buying a whole new motherboard seems pretty overkill (and also expensive for a dead socket), so a PCI-E card seems the best option. I've seen 4 port ones for around £25 which is fair, but I'm worried about speeds. I'd only be connecting 7200rpm drives up, no SSDs, so that means I rough max of around 200MB/s? The motherboard has pci-e x1 slots gen2, meaning it can do around 500MB/s each way? Meaning that I'd be capable of writing to two drives at full speed while also reading? That would be fine if it's the case, but just want to check I've got my numbers correct before I go out and buy something that might turn out to be the wrong thing!