M391B5273DH0-CMA - Samsung 4GB DDR3-1866MHz PC3-14900 ECC Unbuffered CL13 240-Pin DIMM Dual Rank Memory Module

1. Memory Type: DDR3 SDRAM
2. Capacity: 4GB
3. Data Integrity Check: ECC
4. Form Factor: DIMM 240-pin
5. Memory Speed: 1866 MHz (PC3-14900)
6. CAS Latency: CL13
7. Rank: Dual Rank
8. Chip Organization: X8
9. Voltage: 1.5V
10. Error Correction Code (ECC) Support: Yes
11. Unbuffered: Yes
12. Memory Configuration: 512M x 72

Helpful notes:
1. This memory module is designed for use in servers and workstations.
2. ECC memory is more reliable than non-ECC memory as it can detect and correct single-bit errors.
3. Dual rank memory modules provide better performance than single rank modules as they allow for more simultaneous data access.