1.DDR3 is a type of RAM used for system memory while GDDR3 is a type of RAM used for graphics cards. 2.GDDR3 memory is much faster than DDR3 memory. 3.GDDR3 memory is more expensive than DDR3 memory. 4.GDDR3 memory addresses can be read and written at once while DDR3 memory addresses cannot.
generic - relating to or common to or descriptive of all members of a genus; the generic name. 2. generic - (of drugs) not protected by trademark; `Acetaminophen' is the generic form of the proprietary drug `Tylenol'.
The only differences between generics and their brand-name counterparts is the generics are less expensive and may look slightly different (e.g. different shape or color), as trademark laws prevent a generic from looking exactly like the brand-name drug.