Bejavr M.2 PCIe NVMe X4 Adapter with Aluminum Heat Sink, Support PCIe 3.0 4.0 X4 X8 X16 Slot.
Q: Can i boot off of the drive from this adapter?
A: Usually older computer motherboards do not support booting from PCIe, As long as your motherboard has a modern enough chipset that supports booting from PCI Express m.2, yes this will work just fine as a boot drive adapter
Q: Included with the kit are two Thermal pads, one thick and one thin. If both are used which one goes where?
A: （thick）Put one between the ssd and the carrier and （thin）one between the ssd and the heat sink.
➊➤PCIe M.2 NVMe Adapter Card x1
➋➤Regular/Low Profile PCIe Bracket x2
➌➤Aluminum Heatsink x1
➍➤Heat conducting silica gel pad x2
➏➤Screw kit x1
M.2 PCIe Adapter Supports PCI-Express X4, X8, X16 slots.
NVMe PCIe Adapter Apply to 2280/2260/2242/2230mm M.2 NVMe and AHCI SSD. Not Compatible with B-Key SATA M.2 SSD.
PCIe M.2 Adapter Supports Windows 11/10/8、Windows Server 2012 R2、Linux、Fedora、SUSE、Ubuntu、Red Hat（No driver required）.
M.2 to PCIe Adapter with (tall and short) 2 mounting brackets and aluminum heat sink.
The data read/write speed is CPU/PC motherboard/M.2 SSD related, e.g. which PCIe version does it support? For example, PCIe 2.0/3.0/4.0, the speed is limited by the lowest hardware configuration.
Usually older PC motherboards do not support booting a computer system from PCIe, and booting a system from M.2 requires a newer, more modern chipset to do this.