Buying DDR computer memory chips requires many considerations, including clock speed, clock frequency, transfer rate, storage space, electronic interface capabilities, on-die termination, prefetch buffers, off-chip drivers, latency, band width, and operating voltage, some of which rise or fall in effectiveness to the implementation of the other ingredients involved.

DDR, DDR2, and DDR3, are each significantly different from one another, so it depends on the particular operating system to be used and personal preference. In the end, variation in price based on model and storage capacity makes buying DDR computer memory chips a task necessitating some technical knowledge and understanding.

Below are a good amount of models of the DDR memory chip and the comparative prices. This will provide a clearer idea for those interested in buying DDR computer memory chips:

1. DDR PC2100, Memory Part #: 554cm-147 (128 MB/s): DDR 16X64-266MHz DDR266 PC2100 Compatible Memory. Sale: $29.95

2. DDR PC2100, Memory Part#: 512cm-165 (256 MB/s): DDR PC2100 266MHz ECC 184pin. Sale: $62.95.

3. DDR-ECC PC2100, Memory Part #: 513cm-167 (512 MB/s): DDR ECC PC2100 184pin 266MHz 2.5V Compatible Memory. Sale: $69.95.

4. DDR PC2100 EEC, Memory Part #: 539cm-539 (1GB): 1024MB/s DDR PC2100 266MHz ECC Non-Registered 184pin Memory Upgrade. Sale: $139.95.

As can be seen, when purchasing DDR computer memory chips, each one is noticeably unique than the others and therefore has a contrastive price. Sales and discounts are usually available, especially online, and are also affected by the uniqueness of the item.

Obtaining DDR computer memory chips is important in enhancing computer system performance in one way or another. Still, some models work well in certain electronic systems and not in others, so its just as important to know the system as it does the respective strengths and weaknesses of the current DDR memory chips.