Double Data Rate (DDR) SDRAM memory is a product built upon the foundation of older PC100/PC133 memory technology. DDR SDRAM memory can do two operations per clock cycle, unlike SDRAM memory which only supports one operation per the computer's clock cycle. By having DDR technology, you are doubling the memory bandwidth over the corresponding single-data-rate SDRAM.
DDR2 is the evolution of DDR memory technology. DDR2 memory features lower power consumption, higher data bandwidths, faster speeds and enhanced thermal performance.
| Apple Memory Upgrades Descriptions |
Part Number |
| iMac 1.83, 2.0GHz Intel Core Duo (MA199LL/A, MA200LL/A); MacBook Pro 1.67, 1.83, 2.0GHz (MA199LL/A; MA200LL/A; MA090LL/A; MA091LL/A); Mac mini 1.5GHz Core Solo, 1.66GHz Core Duo (MA205LL/A, MA206LL/A)
|
| 512MB DDR2 PC2-5300 667MHz 200-PIN SODIMM 1.8v |
AP667D2S5/512MB |
| 1GB DDR2 PC2-5300 667MHz 200-PIN SODIMM 1.8v |
AP667D2S5/1GB |
| 2GB (Kit 2 x 1GB) DDR2 PC2-5300 667MHz 200-PIN SODIMM 1.8v |
AP667D2S5/1GB (x2) |
| PowerMac G5 2.0, 2.3GHz Dual/Quad Core (M9590LL/A, M9591LL/A, M9592LL/A)
|
| 1GB Kit DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
M9590LL/A-1GB |
| 2GB Kit DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
M9590LL/A-2GB |
| 4GB Kit DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
M9590LL/A-4GB |
| iMac G5 w/ iSight 1.9, 2.1GHz (MA063LL/A, MA064LL/A)
|
| 256MB DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
AA533D2N4/256 |
| 512MB DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
AP533D2N4/512 |
| 1GB DDR2 PC2-4200 533MHz 240-PIN DIMM 1.8v |
AP533D2N4/1GB |
| 2GB PC2-4200 533MHz 240-PIN DIMM 1.8v |
AP533D2N4/2GB |
| iMac G5 1.6, 1.8GHz (M9248LL/A, M9249LL/A, M9250LL/A, M9843LL/A, M9844LL/A, M9845LL/A)
|
| 256MB DDR PC3200 400MHz 184-PIN DIMM 1.8v |
KTA-IMAC400/256-AA |
| 512MB DDR PC3200 400MHz 184-PIN DIMM 1.8v |
KTA-IMAC400/512-AA |
| 1GB DDR PC3200 400MHz 184-PIN DIMM 1.8v |
KTA-IMAC400/1G-AA |
| PowerMac G5 1.8GHz (M9555LL/A)
|
| 512MB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
AA16C3264-PC400 |
| 1GB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
AA16C6464-PC400 |
| 2GB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
AA32C12864-PC400 |
| PowerMac G5/Dual 1.8, 2.0, 2.3, 2.5, 2.7GHz (M9031LL/A, M9032LL/A, M9393LL/A, M9454LL/A, M9455LL/A, M9457LL/A, M9747LL/A, M9748LL/A, M9749LL/A)
|
| 512MB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
512MBDDRKIT-PC400 |
| 1GB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
1GBDDRKIT-PC400 |
| 2GB Kit DDR PC3200 400MHz 184-PIN DIMM 1.8v |
2GBDDRKIT-PC400 |
| PowerMac G5 1.6GHz (M9020LL/A)
|
| 512MB Kit DDR PC2700 333MHz 184-PIN DIMM 1.8v |
512MBDDRKIT-PC333 |
| 1GB Kit DDR PC2700 333MHz 184-PIN DIMM 1.8v |
1GBDDRKIT-PC333 |
| 2GB Kit DDR PC2700 333MHz 184-PIN DIMM 1.8v |
2GBDDRKIT-PC333 |
Drivers 
