Version of Windows?

Is the new SSD a SATA3 or M.2 NVME SSD?

Are you trying to replace an existing drive or will the new SSD be an additional drive? 

Have you checked the supported drive configurations for Precision 3660?

Are any of your existing drives in a RAID configuration?

Reboot and tap F2 to open BIOS setup.  Is SATA Operation set to RAID or something else? Don't change that setting!