QNAP 6-Bay NAS Diskless Celeron QC 2.9GHz 8GBIntel quad core dual port 2. 5GbE NAS supports M. 2 SSD caching and PCIe expandability for high speed transmission and virtualization applications TS 664 is a compact 6 bay NAS with superior performance. Supporting up to 110 TB storage and 4 TB M. 2 SSD caching* at an affordable price, the TS 664 fulfills your multitasking challenges for file management, backup, collaboration, and video conversion. 2. 5GbE is a must! TS 664 is as fast as a single port