CT2KIT12864AA53E - Crucial 2GB Kit (2 X 1GB) DDR2-533MHz PC2-4200 non-ECC Unbuffered CL4 240-Pin DIMM Memory

Technical Specs:
- Memory Type: DDR2 SDRAM
- Capacity: 2GB (2 x 1GB)
- Speed: 533MHz (PC2-4200)
- Latency Timings: CL4
- Form Factor: DIMM 240-pin
- Error Correction: Non-ECC
- Buffered/Unbuffered: Unbuffered

Helpful Notes:
- DDR2-533MHz is a relatively slow speed by today's standards, and may not be compatible with newer motherboards.
- Non-ECC memory is less reliable than ECC memory, but also less expensive.
- This kit is designed for desktop computers, not laptops.