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49Y3693 . Is a DDR3 Module. DDR3 Modules run from 1066 to 1600 MT/s (million transfers per second). This module has a total capacity of 2GB. The Bus Type is PC-10600. Registered ECC help prevent data corruption and maintain data integrity, usually used in servers. Has a data transfer rate of 1333 Mhz.

00Y3653 . Is a DDR3 Module. DDR3 Modules run from 1066 to 1600 MT/s (million transfers per second). This is a 4GB module. Contains a PC-12800 Memory Bus Type. Corrects errors with its Error Correction Code (ECC) making it suitable for conditions where data integrity is vital. You can expect the data to transfer at a rate of 1600 Mhz.

Increasing memory in your IBM system is a very cost-effective way to help boost performance allow you to open more applications at once and save time and hassle. Since IBM is responsible for the design testing manufacturing and quality of IBM memory compatibility with your IBM computer is backed by IBM Service and Support.