Standard : 800 MHz DDR2 SDRAM; two slots supporting dual channel memory 1024 MB, 2048 MB, 4096 MB, or 8192 MB.
Maximum : Upgradeable to 8192 MB with 4096 MB SODIMMs in slots 1 and 2.
Dual-channel : Maximized dual-channel performance requires SODIMMs of the same size and speed in both memory slots.