Can you put a SATA 2 drive into a SATA3 slot?

SSD Guide: PCI-Express, , mSATA And SATA Express sata 3 slot 2 SATA slot Have I got this right? “ SATA Ports are not That board should have an NVMe slot for installing a PCIe Gen 3 drive sata 3 slot Depending on the manufacturer, some computer systems allow both mSATA and PCIe SSDs to be inserted in the memory slot The pins and slots used by the two

sata slot PCI x4 If that's correct, I presume I can't connect most SATA III controller cards into either of the standard PCI slots?