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- Description
- Specifications
TN78Y is a 32 GB DDR4 registered DIMM (RDIMM) built as two ranks of x4 devices, running at 2666 MT/s on 1.2 V. Its SDDC support covers all modes, whereas the 16 GB two-rank x8 RDIMM VM51C in the same PowerEdge C4140 memory set is limited to Advanced ECC.
In the PowerEdge C4140, TN78Y is the 32 GB RDIMM for the original Intel Xeon Scalable processor family. With second-generation Xeon Scalable processors the C4140 uses 8WKDY for its 32 GB two-rank x4 RDIMM, with a speed range of 2933 down to 2666 MT/s.
The C4140 has 24 DIMM slots, with six DDR4 channels per processor and two DIMMs per channel, and a memory range of 16 GB minimum to 1.5 TB maximum. It takes RDIMMs and LRDIMMs; UDIMMs and NVDIMMs are not supported. All memory on all processors and channels runs at one speed and voltage, which defaults to the highest speed that both the CPU and the DIMMs can run.
The processor sets the ceiling for a 2666 MT/s module such as TN78Y. In the original Xeon Scalable family, Platinum SKUs support memory up to 2666 MT/s, while Gold and Silver SKUs support up to 2400 MT/s.
| TN78Y Specs | |
| Dell part number | TN78Y |
| Capacity | 32 GB |
| Type | DDR4 RDIMM |
| Speed | 2666 MT/s |
| Ranks per DIMM | 2 |
| Data width | x4 |
| Voltage | 1.2 V |
| SDDC support | All Modes |
| Fits | PowerEdge C4140 with Intel Xeon Scalable processor family |