TS4GCQ0682 - Transcend 4GB Kit (2 X 2GB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory

1. Memory Type: DDR SDRAM
2. Memory Size: 4 GB (2 x 2 GB)
3. Memory Speed: 266 MHz
4. Memory Standard: PC2100
5. Error Correction Code (ECC): ECC Registered
6. CAS Latency: CL2.5
7. Pin Count: 184-Pin DIMM
8. Voltage: 2.5V
9. Memory Rank: Dual Rank
10. Module Configuration: 256M x 72
11. Memory Organization: 2Rx8
12. Memory Form Factor: DIMM 184-pin

Notes:
1. ECC registered memory is more reliable than non-ECC memory as it can detect and correct errors.
2. Dual rank memory allows for better performance in certain applications.
3. Make sure your motherboard supports DDR-266MHz PC2100 memory before purchasing.