Specification
Marvell 88SE9215 chipset
Ports:8 SATA 6GB/s Ports
Compliant with PCI-E Specification V2.0 and backward compatible with PCI-E 1.X
Supports Native Command Queuing (NCQ)
Compatible with SATA 6G, 3G and 1.5G Hard drives
Compliant with PCI-E Specification v2.0 and backward compatible with PCI-E v1.x
PCI Express x1 Interface, and Compatible with PCI Express x1, x2, x4, x8 and x16 Slots
Marvell 88SE9215+JMicron JMB5xx chipset
Supports 10TB hard disk drives
Non-RAID standard SATA controller 
Features
System Requirements:Windows 10/8.1/8/7(32/64bit)/XP/Linux
Interface:PCI Express x1 interface. Compatible with PCI-E X1,X4,X8,X16 Slots
NOTE:
Synology can only recognize 4 SATA
Since Lenovo and Dell have shielded the BIOS settings, there may be compatibility issues
If you want to insert the system disk on this card, please confirm that your system disk is installed in AHCI mode, otherwise the system cannot be started. The BIOS sets the system disk to the first boot and the hard disk interface option to Disabled. 
Installation instructions
1:Please clean the gold finger of SATA3.0 card by eraser , Plug the SATA cable of the chassis into the card. then connect all the hard disks.
2:Turn off the power of the computer and open the back cover of the PC; Remove the bars corresponding to the free slot on the chassis.
3:Insert the expansion card into the corresponding PCI-E expansion slot of the host
4:Secure the iron strip of the expansion card to the chassis with a screwdriver.
5:Close the chassis and plug in the power cord to boot. After entering the system, install the driver
Driver Installation <For Windows XP/Vista/7/8/10(32/64 bit)>
1. Insert the companion drive CD into the CD drive;
2. Open "My Computer", find the location of the disc, open the disc;
3. Locate the "CD:\ SATA CARD\Marvell\9215\drvsetup inside the .exe driver file;
4. Then follow the instructions of the computer to complete the installation, then restart the computer
Check the installation
Suitable for PCI-E card with Marvell 88SE9215+JMicron JMB5xx Chipset:
Open the "Device Manager", expand the "Universal Serial Bus Controller" option, if there is "Marvell 92xx SATA 6G Controller", the hardware and driver are installed successfully; if there is "unknown device" or other information, the hardware or The driver did not install successfully.
If there is "Standard SATA AHCI Controller" hardware information under "Device Manager" or
"IDE ATA/ATAPI Controller", that means the driver didn't installed under windows10.
Package
1xSATA 3.0 Expansion Card
1xLow Profile Bracket