1. 30 Pin SIMM

2. 30 Pin SIMM BASE

3. 30 Pin SIMM

4. 72 Pin SIMM
1 MB, 4 MB, 8 MB, 16 MB,
32 MB each Module

5. 72 Pin SIMM and it’s Base

6. 168 PIN DIMM
32 MB, 64 MB, 128 MB EACH Module

7. DDR1 Module (184 Pin)
Available in 266 / 333 / 400
MHz Versions

8. DDR 1 RAM Module
Available in 128 MB, 256 MB and 512
MB each Module

9. DDR 1 RAM Module (with cover)

10. 240 Pins
Available in 400 / 533 / 667 MHz Versions

11. Difference between DDR1 and DDR2

12. Difference between DDR1 and DDR2

14. SD Ram is actually SDR SDRAM, and DD Ram is actually
DDR SDRAM, though the former does not usually have the
SDR in front of it. The letters SDR and DDR stand for Single
Data Rate and Double Data Rate, and the letters SDRAM
stand for Synchronous Dynamic Random Access Memory.
The main difference between SDR and DDR memory is
speed. There are a lot of little differences, but the main one
(IMHO) that affects the user is speed: DDR can transfer
data at roughly twice the speed of SDR. More speedy data
rates = better performance. Just remember, the
motherboard you are using must include the appropriate
chipset to support the different RAM types. They are not
interchangeable. SDR SDRAM comes in three main flavors:
PC66, PC100 and PC133. Each successive number refers
to the bus speed of the RAM in MHz, thus PC66 runs at 66
MHz, PC100 runs at 100 MHz, etc. SDR SDRAM has 168
pins at the connector.

15. DDR SDRAM has 184 pins at the connector, which is one
reason you can't just use DDR instead of SDR, and comes
in many different flavors; PC2100 which runs at 266 MHz,
PC2700 which runs at 333 MHz, PC3200 which runs at 400
MHz, etc. In order to know which type of RAM you need, you
must know what your motherboard supports. I recommend
searching the motherboard manufacturer's website for this
info, or review sites like www.tomshardware.com or
www.sharkyextreme.com .

16. Memory Module