ADATA 2 GB DDR-400 (PC-3200) DIMM 2 x 1 GB Memory Kit with Heatspreader AD1U400A1G3DRH (Black) improved system performance and responsiveness Compatible with PC3200 (400 MHz), PC2700 (333 MHz), and PC2100 (266 MHz) systems Lifetime Warranty upgrade to better system performance and responsiveness first choice of memory upgrade for value-driven users