The T110 II takes UDIMMs and the NT8GC72B4NB1NJ-CG are RDIMMs. Page 86 of the user guide contains the section on memory.

  • 2Gb DRAM technology
  • Supports 2 channels per processor
  • Supports Un-buffered (UDIMM) ECC DDR3 DIMMs.
  • DDR3 speeds of 1333 and 1600 (with Ivy Bridge Processor) supported
  • Single Rank and Dual Rank UDIMMs supported
  • No RDIMM support
  • Low-voltage(LV) DIMM supported @ 3.5V only
  • Non-ECC DIMMs are not supported
  • Support for up to 32GB UDIMM memory (with 4 x 8GB UDIMMs)
  • No support for quad rank DIMMs
  • Single DIMM configuration only with DIMM in socket A1

https://www.dell.com/community/PowerEdge-Hardware-General/Upgrade-RAM-PowerEdge-Dell-T110-II/td-p/6051633