HardwareSecret today learns us the main differences between DDR (DDR2 and DDR3) and GDDR (GDDR2 and GDDR3) memories.
Here is a snippet: RAM memory is also used on video cards to make the video memory circuit. Until recently the video memory used the exact same technology as the system RAM memory that is installed on the motherboard. High-end video cards, however, needed memory chips faster than the ones used on the PC. So the manufacturers decided to go for DDR2 and DDR3 technologies. Read more at HardwareSecrets