DDR and SD

[Gunner]

How do I spot the difference between a DDR and SD RAM ? And what is Dual Core processing ?

[ashu888ashu888]

SDRAM has 168 pins and two notches at the connector, which prevents it from being used in a DDR SDRAM motherboard and vice versa. It comes mainly in PC66, PC100 and PC133; the bus speeds of the RAM in MHz.

DDR SDRAM has 184 pins and a single notch at the connector. It comes in speeds of PC1600 (166 MHz), PC1800 (200 MHz), PC2100 (266 MHz), PC2700 (333 MHz), PC3200 (400 MHz), and PC4400 (550 Mhz). The numbers represent the theoretical maximum bandwidth of the DDR SDRAM in Megabytes per second (MB/s). For example, PC2100 has a theoretical maximum bandwidth of 2100 MB/s.
See this for a DDR RAM Image:www.ec.ingrammicro.de/jpg/3423799.jpg and this for SD RAM Image:www.totalpc.it/images/SD-RAM.gif

Also see this from WIKIPEDIA:www.en.wikipedia.org/wiki/DDR_RAM

Cheers n e-peace....

[sujithtom]

The most simple method to spot the diffrence between SD and DDR is

The chip link thingy or the circuit in DDR is sperated in the middle while in case of SD its somewat like 3/4 and 1/4. I don't know how to explain this in better words..

Dual Core (or multi core)

A multi-core microprocessor is one which combines two or more independent processors into a single package, often a single integrated circuit (IC). A dual-core device contains only two independent microprocessors. In general, multi-core microprocessors allow a computing device to exhibit some form of thread-level parallelism (TLP) without including multiple microprocessors in separate physical packages. This form of TLP is often known as chip-level multiprocessing, or CMP.

http://en.wikipedia.org/wiki/Dual_Core