Save and Exit from the BIOS and then go back into it. ( DO NOT set IDE at any point.) Most often this is left as AHCI, as you may be using additional SATA drivers or have one of the AHCI PCIe SSDs. The Storage Configuration screen shows the SATA mode as default set to AHCI. This can be changed to RAID or IDE. Change the default setting from Legacy Only to UEFI Only. Look for the option Launch Storage OpROM Policy within CSM. PCIe NVMe SSDs also have their own NVMe storage controller built into the drive.Ĭompatibility Support Module (CSM) is enabled by default on the Boot screen in your BIOS. It shares nothing with SATA and replaces AHCI with a better method of dealing with solid state storage. This is a protocol designed specifically for SSD storage. This is the same protocol used by SATA SSDs. There are two types of non-Physical Interface: Advanced Host Controller Interface (AHCI) This means you could see a trade-off between interoperability and performance. However its lack of specialization makes programming difficult.

PCIe is a multipurpose bus designed to put through all kinds of data to the processor. (Which has a maximum of 25 channels.) This makes it suitable for buffering and caching applications. PCIe SSDs increase performance by getting rid of the SATA interface (Which so far has a maximum of 10 channels.) for PCIe. x16 is recommended for these cards, which can take up to 4 x4 SSDs.) Failing to do so can result in drives not being detected. (For example: 2 x4 SSDs fitted in adapter - x8 PCIe slot or greater is needed. Note: Using a PCIe adapter card with multiple x4 SSDs? Remember to fit the card in a slot of equal or greater capacity than the total of the cards.

What can you use pcie slots for