2GB DDR3 1333MHz
DDR3 SDRAM modules use DDR architecture to achieve high-speed operation. DDR3 architecture is basically an 8n-prefetch architecture that transfers two data words per clock cycle at the input-output pins. Initially, it was launched with 1.5v DDR3 DRAM; later DDR3 DRAM works at 1.35v. 1.35v is usually compatible with all 1.5v platforms. Long-DIMM (or Desktop RAM) comprises 240 connector pins, whereas SO-DIMM (Laptop RAM) comprises 204 connector pins. Long DIMM of both DDR2 and DDR3 has 240 pins, but they can easily be identified as their notch location of DDR3 is nearer to pin 1 as opposed to DDR2 Long-DIMM. It typically has data transfer rates of PC3-6400 (800MT/s), PC3-8500 (1066MT/s), PC3-10600 (1333MT/s), PC3-12800 (1600MT/s), or PC3-14900 (1866MT/s).