Hello Sargith, Please be informed that the WD_BLACK SN850 SSD comes in two variants with/or without heatsink. Long load times are obsolete with next-gen PCIe® Gen4 technology, reaching irrational read/write speeds up to 7000/5300MB/s**. Arm your system with RGB lighting, an optional heatsink model. If you are purchasing the drive on WD Online Store, then you can contact our Online Store Support https://shop.westerndigital.com/. For more information on the drive refer to the link: http://products.wdc.com/library/AAG/ENG/data-sheet-wd-black-sn850-nvme-ssd.pdf -Need Help? Please see our "'Contact Us" page for information.